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Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2018	Jul. 31, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Entity Registrant Name	HC2 Holdings, Inc.
Entity Central Index Key	0001006837
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding (in shares)		44,707,771

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Revenue	$ 455,038	$ 340,383	$ 870,515	$ 694,925
Life, accident and health earned premiums, net	19,905	20,235	39,945	40,176
Net investment income	19,342	16,939	37,066	32,243
Net realized and unrealized gains on investments	2,494	1,095	2,943	1,876
Net revenue	496,779	378,652	950,469	769,220
Operating expenses
Cost of revenue	400,609	308,664	776,283	623,078
Policy benefits, changes in reserves, and commissions	35,391	30,443	67,674	61,930
Selling, general and administrative	57,055	41,707	109,143	81,563
Depreciation and amortization	9,057	7,295	18,713	14,692
Other operating (income) expense, net	185	1,738	(2,067)	(1,820)
Total operating expenses	502,297	389,847	969,746	779,443
Loss from operations	(5,518)	(11,195)	(19,277)	(10,223)
Interest expense	(17,181)	(12,073)	(36,506)	(26,188)
Gain on sale of subsidiary	102,141	0	102,141	0
Income from equity investees	10,752	4,003	5,521	11,696
Other income (expenses), net	(968)	(3,193)	124	(8,334)
Income (loss) from continuing operations before income taxes	89,226	(22,458)	52,003	(33,049)
Income tax (expense) benefit	(9,462)	1,985	(11,093)	(3,306)
Net income (loss)	79,764	(20,473)	40,910	(36,355)
Less: Net (income) loss attributable to noncontrolling interest and redeemable noncontrolling interest	(24,398)	2,562	(20,540)	3,948
Net income (loss) attributable to HC2 Holdings, Inc.	55,366	(17,911)	20,370	(32,407)
Less: Preferred stock and deemed dividends from conversions	703	793	1,406	1,376
Net income (loss) attributable to common stock and participating preferred stockholders	$ 54,663	$ (18,704)	$ 18,964	$ (33,783)
Income (loss) per Common Share
Basic (in usd per share)	$ 1.11	$ (0.44)	$ 0.39	$ (0.80)
Diluted (in usd per share)	$ 1.08	$ (0.44)	$ 0.38	$ (0.80)
Weighted average common shares outstanding:
Basic (in shares)	44,180	42,691	44,114	42,322
Diluted (in shares)	45,503	42,691	45,284	42,322

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 79,764	$ (20,473)	$ 40,910	$ (36,355)
Other comprehensive income (loss)
Foreign currency translation adjustment	(6,205)	2,224	(1,700)	3,349
Unrealized gain (loss) on available-for-sale securities	(22,931)	19,000	(51,593)	30,976
Other comprehensive income (loss)	(29,136)	21,224	(53,293)	34,325
Comprehensive income (loss)	50,628	751	(12,383)	(2,030)
Comprehensive (income) loss attributable to noncontrolling interests and redeemable noncontrolling interests	(24,090)	2,562	(20,232)	3,948
Comprehensive income (loss) attributable to HC2 Holdings, Inc.	$ 26,538	$ 3,313	$ (32,615)	$ 1,918

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Investments:
Fixed maturity securities, available-for-sale at fair value	$ 1,249,253	$ 1,340,626
Equity securities	79,557	47,500
Mortgage loans	69,890	52,109
Policy loans	17,768	17,944
Other invested assets	86,109	85,419
Total investments	1,502,577	1,543,598
Cash and cash equivalents	112,304	97,885
Accounts receivable, net	346,702	322,446
Recoverable from reinsurers	531,269	526,337
Deferred tax asset	991	1,661
Property, plant and equipment, net	368,914	374,660
Goodwill	128,846	131,741
Intangibles, net	120,280	117,105
Other assets	142,453	102,258
Total assets	3,254,336	3,217,691
Liabilities, temporary equity and stockholders’ equity
Life, accident and health reserves	1,728,167	1,693,961
Annuity reserves	237,373	243,156
Value of business acquired	40,500	42,969
Accounts payable and other current liabilities	296,339	347,492
Deferred tax liability	8,634	10,740
Debt obligations	668,505	593,172
Other liabilities	79,529	70,174
Total liabilities	3,059,047	3,001,664
Commitments and contingencies
Temporary equity
Preferred stock	26,325	26,296
Redeemable noncontrolling interest	8,396	1,609
Total temporary equity	34,721	27,905
Stockholders’ equity
Common stock, $.001 par value;80,000,000 shares authorized; 45,121,231 and 44,570,004 shares issued and 44,676,335 and 44,190,826 shares outstanding at June 30, 2018 and December 31, 2017, respectively	45	44
Additional paid-in capital	259,999	254,685
Treasury stock, at cost: 444,896 and 379,178 shares at June 30, 2018 and December 31, 2017, respectively	(2,434)	(2,057)
Accumulated deficit	(197,148)	(221,189)
Accumulated other comprehensive income (loss)	(9,175)	41,688
Total HC2 Holdings, Inc. stockholders’ equity	51,287	73,171
Noncontrolling interest	109,281	114,951
Total stockholders’ equity	160,568	188,122
Total liabilities, temporary equity and stockholders’ equity	$ 3,254,336	$ 3,217,691

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Jun. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock (in shares)	80,000,000	80,000,000
Common stock, shares issued (in shares)	45,121,231	44,570,004
Common stock, shares outstanding (in shares)	44,676,335	44,190,826
Treasury stock (in shares)	444,896	379,178

Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($)
$ in Thousands

Total

Common Stock

Additional Paid-In Capital

Treasury Stock

Retained Earnings (Accumulated Deficit)

Accumulated Other Comprehensive Income (Loss)

Total HC2 Stockholders' Equity

Non-controlling Interest

Temporary Equity

Beginning balance (in shares) at Dec. 31, 2016

41,811,000

Beginning balance at Dec. 31, 2016

$ 67,439

$ 42

$ 241,485

$ (1,387)

$ (174,278)

$ (21,647)

$ 44,215

$ 23,224

$ 31,985

Increase (Decrease) in Stockholders' Equity [Roll Forward]

Share-based compensation

3,809

Dividend paid to noncontrolling interests

(378)

Fair value adjustment of redeemable noncontrolling interest

(533)

533

Exercise of stock options (in shares)

129,000

Exercise of stock options

462

Taxes paid in lieu of shares issued for share-based compensation (in shares)

(105,000)

Taxes paid in lieu of shares issued for share-based compensation

(582)

Preferred stock dividend

(1,063)

Amortization of issuance costs and beneficial conversion feature

(35)

Issuance of common stock (in shares)

363,000

Issuance of common stock

Conversion of preferred stock to common stock (in shares)

803,000

Conversion of preferred stock to common stock

3,027

$ 1

3,026

3,027

(3,228)

Transactions with noncontrolling interests

332

Net income (loss)

(35,337)

(32,407)

(2,930)

Net loss

(36,355)

(1,018)

Other comprehensive income (loss)

34,325

Ending balance (in shares) at Jun. 30, 2017

43,001,000

Ending balance at Jun. 30, 2017

71,150

$ 43

247,167

(1,969)

(206,685)

12,678

51,234

19,916

28,639

Increase (Decrease) in Stockholders' Equity [Roll Forward]

Cumulative effect of accounting adjustment | Accounting Standards Update 2014-09

^[1]

667

376

291

Cumulative effect of accounting adjustment | Accounting Standards Update 2016-01

^[1]

1,635

3,295

(1,660)

1,635

Beginning balance (in shares) at Dec. 31, 2017

44,190,000

Beginning balance at Dec. 31, 2017

188,122

$ 44

254,685

(2,057)

(221,189)

41,688

73,171

114,951

27,905

Increase (Decrease) in Stockholders' Equity [Roll Forward]

Share-based compensation

6,605

Fair value adjustment of redeemable noncontrolling interest

$ (3,311)

(3,311)

3,311

Exercise of stock options (in shares)

102,242

82,000

Exercise of stock options

$ 372

372

Taxes paid in lieu of shares issued for share-based compensation (in shares)

(65,000)

Taxes paid in lieu of shares issued for share-based compensation

(377)

Preferred stock dividend

(1,000)

Amortization of issuance costs and beneficial conversion feature

(30)

Issuance of common stock (in shares)

470,000

Issuance of common stock

$ 1

Transactions with noncontrolling interests

(21,227)

2,678

3,781

6,459

(27,686)

4,968

Net income (loss)

41,651

20,370

21,281

Net loss

40,910

(741)

Other comprehensive income

(52,540)

(52,984)

444

(752)

Other comprehensive income (loss)

(53,293)

Ending balance (in shares) at Jun. 30, 2018

44,677,000

Ending balance at Jun. 30, 2018

$ 160,568

$ 45

$ 259,999

$ (2,434)

$ (197,148)

$ (9,175)

$ 51,287

$ 109,281

$ 34,721

[1]	See Note 2 for further information about adjustments resulting from the Company’s adoption of new accounting standards in 2018.

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net loss	$ 40,910	$ (36,355)
Adjustments to reconcile net income (loss) to cash (used in) provided by operating activities:
Provision for doubtful accounts receivable	818	(506)
Share-based compensation expense	4,793	2,624
Depreciation and amortization	21,993	17,234
Amortization of deferred financing costs and debt discount	4,658	3,460
Amortization of (discount) premium on investments	2,418	4,255
Gain on sale of subsidiary	(2,448)	(3,879)
(Gain) loss on sale or disposal of a subsidiary	(102,141)	0
Lease termination costs	0	249
Asset impairment expense	381	1,810
Income from equity investees	(5,521)	(11,696)
Impairment of investments	0	6,089
Net realized and unrealized gains on investments	(2,988)	(1,896)
Loss on contingent consideration	0	319
Receipt of dividends from equity investees	3,081	917
Deferred income taxes	423	(8,784)
Annuity benefits	4,191	4,346
Loss on early extinguishment of debt	2,537	0
Other operating activities	(1,241)	2,718
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	(23,082)	19,848
Recoverable from reinsurers	(4,931)	(3,595)
Other assets	(21,434)	(12,729)
Life, accident and health reserves	34,133	34,700
Accounts payable and other current liabilities	(9,712)	(8,056)
Other liabilities	12,008	5,843
Cash (used in) provided by operating activities:	(41,154)	16,916
Cash flows from investing activities:
Purchase of property, plant and equipment	(20,234)	(17,019)
Disposal of property, plant and equipment	3,500	382
Purchase of investments	(207,548)	(157,599)
Sale of investments	155,545	70,750
Maturities and redemptions of investments	40,000	74,957
Purchase of equity method investments	(127)	(10,390)
Cash received for business disposition, net of cash disposed	93,272	0
Cash paid for business acquisitions, net of cash acquired	(45,965)	0
Other investing activities	(2,023)	373
Cash provided by (used in) investing activities:	16,420	(38,546)
Cash flows from financing activities:
Proceeds from debt obligations	180,326	104,410
Principal payments on debt obligations	(110,736)	(44,127)
Annuity receipts	1,308	1,563
Annuity surrenders	(11,208)	(10,600)
Transactions with noncontrolling interest	(14,889)	332
Payment of dividends	(1,000)	(2,262)
Taxes paid in lieu of shares issued for share-based compensation	(377)	(583)
Proceeds from the exercise of warrants and stock options	488	450
Other financing activities	(805)	(116)
Cash provided by financing activities:	43,107	49,067
Effects of exchange rate changes on cash and cash equivalents	(371)	319
Net change in cash and cash equivalents and restricted cash	18,002	27,756
Cash and cash equivalents and restricted cash, beginning of period	98,853	115,869
Cash and cash equivalents and restricted cash, end of period	116,855	143,625
Supplemental cash flow information:
Cash paid for interest	33,944	23,224
Cash paid for taxes	11,512	8,647
Non-cash investing and financing activities:
Property, plant and equipment included in accounts payable	1,202	1,630
Investments included in accounts payable	750	21,433
Conversion of preferred stock to common stock	0	4,433
Dividends payable to shareholders	$ 500	$ 500

Organization and Business	6 Months Ended
Organization and Business	Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Business	1. Organization and Business HC2 Holdings, Inc. ("HC2" and, together with its consolidated subsidiaries, the "Company", "we" and "our") is a diversified holding company which seeks to acquire and grow attractive businesses that we believe can generate long-term sustainable free cash flow and attractive returns. While the Company generally intends to acquire controlling equity interests in its operating subsidiaries, the Company may invest to a limited extent in a variety of debt instruments or noncontrolling equity interest positions. The Company’s shares of common stock trade on the NYSE under the symbol "HCHC". The Company currently has eight reportable segments based on management’s organization of the enterprise - Construction, Marine Services, Energy, Telecommunications, Insurance, Life Sciences, Broadcasting, and Other, which includes businesses that do not meet the separately reportable segment thresholds. 1.Our Construction segment is comprised of DBM Global Inc. ("DBMG") and its wholly-owned subsidiaries. DBMG is a fully integrated Building Information Modelling modeler, detailer, fabricator and erector of structural steel and heavy steel plate. DBMG models, details, fabricates and erects structural steel for commercial and industrial construction projects such as high- and low-rise buildings and office complexes, hotels and casinos, convention centers, sports arenas, shopping malls, hospitals, dams, bridges, mines and power plants. DBMG also fabricates trusses and girders and specializes in the fabrication and erection of large-diameter water pipe and water storage tanks. Through Aitken, DBMG manufactures pollution control scrubbers, tunnel liners, pressure vessels, strainers, filters, separators and a variety of customized products. The Company maintains an approximately 92% controlling interest in DBMG. 2.Our Marine Services segment is comprised of Global Marine Systems Limited ("GMSL"). GMSL is a leading provider of engineering and underwater services on submarine cables. GMSL aims to maintain its leading market position in the telecommunications maintenance segment and seeks opportunities to grow its installation activities in the three market sectors (telecommunications, offshore power, and oil and gas) while capitalizing on high market growth in the offshore power sector through expansion of its installation and maintenance services in that sector. The Company maintains an approximately 72% controlling interest in GMSL. 3.Our Energy segment is comprised of American Natural Gas, LLC ("ANG"). ANG is a premier distributor of natural gas motor fuel. ANG designs, builds, owns, acquires, operates and maintains compressed natural gas fueling stations for transportation vehicles. The Company maintains an approximately 68% controlling interest in ANG. 4.Our Telecommunications segment is comprised of PTGi International Carrier Services ("ICS"). ICS operates a telecommunications business including a network of direct routes and provides premium voice communication services for national telecommunications operators, mobile operators, wholesale carriers, prepaid operators, voice over internet protocol service operators and internet service providers. ICS provides a quality service via direct routes and by forming strong relationships with carefully selected partners. The Company maintains a 100% interest in ICS. 5.Our Insurance segment is comprised of Continental General Insurance Company ("CGI" or the "Insurance Company"). CGI provides long-term care, life and annuity coverage that help protect policy and certificate holders from the financial hardships associated with illness, injury, loss of life, or income continuation. The Company maintains a 100% interest in CGI. 6.Our Life Sciences segment is comprised of Pansend Life Sciences, LLC ("Pansend"). Pansend maintains controlling interests of approximately 80% in Genovel Orthopedics, Inc. ("Genovel"), which seeks to develop products to treat early osteoarthritis of the knee and approximately 74% in R2 Dermatology Inc. ("R2"), which develops skin lightening technology. Pansend also invests in other early stage or developmental stage healthcare companies including an approximately 50% interest in Medibeacon Inc., and an investment in Triple Ring Technologies, Inc. 7.Our Broadcasting segment is comprised of HC2 Broadcasting Holdings Inc. (“Broadcasting”) and its subsidiaries. Broadcasting strategically acquires and operates Over-The-Air ("OTA") broadcasting stations across the United States. In addition, Broadcasting, through its wholly-owned subsidiary, HC2 Network Inc. (“Network”), operates Azteca America, a Spanish-language broadcast network offering high quality Hispanic content to a diverse demographic across the United States. Broadcasting maintains an approximately 50% controlling interest in DTV America Corporation ("DTV"). 8.In our Other segment, we invest in and grow developmental stage companies that we believe have significant growth potential. Among the businesses included in this segment is the Company's approximately 56% controlling interest in 704Games Company ("704Games"), which owns licenses to create and distribute NASCAR® video games.

Summary of Significant Accounting Policies

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

2. Summary of Significant Accounting Policies

Basis of Presentation

The accompanying unaudited Condensed Consolidated Financial Statements of the Company included herein have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). The financial statements reflect all adjustments that are, in the opinion of management, necessary for a fair statement of such information. All such adjustments are of a normal recurring nature. Certain information and note disclosures, including a description of significant accounting policies normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP"), have been condensed or omitted pursuant to such rules and regulations. Certain prior amounts have been reclassified or combined to conform to the current year presentation. These reclassifications and combinations had no effect on previously reported net loss attributable to controlling interest or accumulated deficit. These interim financial statements should be read in conjunction with the Company’s annual consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2017, filed with the SEC on March 14, 2018, as amended by amendment no.1, filed on April 2, 2018 (collectively, "Form 10-K"). The results of operations for the three and six months ended June 30, 2018 are not necessarily indicative of the results for any subsequent periods or the entire fiscal year ending December 31, 2018.

Use of Estimates and Assumptions

The preparation of the Company’s Condensed Consolidated Financial Statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates and assumptions used.

Accounting Pronouncements Adopted in the Current Year

The Company’s 2017 Form 10-K includes discussion of significant recent accounting pronouncements that either have impacted or may impact our financial statements in the future. The following discussion provides information about recently adopted and recently issued or changed accounting guidance (applicable to the Company ) that have occurred since the Company filed its 2017 Form 10-K. The Company has implemented all new accounting pronouncements that are in effect and that may impact its Condensed Consolidated Financial Statements and does not believe that there are any other new accounting pronouncements that have been issued that might have a material impact on its financial condition, results of operations or liquidity.

Effective January 1, 2018 the Company adopted the accounting pronouncements described below.

Statement of Cash Flows

In November 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Codification ("ASC") 2016-18, Restricted Cash - a consensus of the FASB Emerging Issues Task Force. This guidance requires entities to show the changes in the total cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. As a result, entities will no longer present transfers between cash and cash equivalents and restricted cash and cash equivalents in the statement of cash flows. When cash, cash equivalents, restricted cash and restricted cash equivalents are presented in more than one line item on the balance sheet, the new guidance requires a reconciliation of the totals in the statement of cash flows to the related captions in the balance sheet. This reconciliation can be presented either on the face of the statement of cash flows or in the notes to the financial statements. This standard was applied retrospectively, which resulted in the recast of the prior reporting period in the condensed consolidated statements of cash flows. A reconciliation of cash and cash equivalents and restricted cash from our condensed consolidated statements of cash flows to the amounts reported within our condensed consolidated balance sheet is included in our condensed consolidated statements of cash flows.

The following table provides a reconciliation of cash and cash equivalents and restricted cash to amounts reported within the Condensed Consolidated Balance Sheets and Condensed Consolidated Statements of Cash Flows (in thousands):



	June 30, 2018		June 30, 2017
Cash and cash equivalents, beginning of period	$	97,885	$	115,371
Restricted cash included in other assets	968		498
Total cash and cash equivalents and restricted cash	$	98,853	$	115,869

Cash and cash equivalents, end of period	$	112,304	$	143,130
Restricted cash included in other assets	4,551		495
Total cash and cash equivalents and restricted cash	$	116,855	$	143,625

Recognition and Measurement of Financial Assets and Financial Liabilities

In January 2016, the FASB issued ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities. The update provides that equity investments with readily determinable values be measured at fair value and changes in the fair value flow through net income. These changes historically have run through other comprehensive income. Equity investments without readily determinable fair values have the option to be measured at fair value or at cost, adjusted for changes in observable prices minus impairment. Changes in either method are also recognized in net income. The standard requires a qualitative assessment of impairment indicators at each reporting period. For financial liabilities, entities that elect the fair value option must recognize the change in fair value attributable to instrument-specific credit risk in other comprehensive income rather than net income. Lastly, regarding deferred tax assets, the need for a valuation allowance on a deferred tax asset will need to be assessed related to available-for-sale debt securities. This standard was adopted prospectively as of January 1, 2018 and resulted in a $3.3 million cumulative effect adjustment credit to retained earnings related to the following investments:



Equity securities which were previously classified as available-for-sale	$	1,660
Equity securities which were previously accounted for under the cost method	1,635
Total	$	3,295

See Note 5. Investments and Note 6. Fair Value of Financial Instruments for further details.

Revenue Recognition

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) ("ASC 606"). This ASU supersedes the revenue recognition requirements in Revenue Recognition (Topic 605). Under the new guidance, an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In March 2016, the FASB issued ASU 2016-08, Revenue from Contracts with Customers (Topic 606): Principal Versus Agent Considerations, which clarifies the guidance in ASU 2014-09. In April 2016, the FASB issued ASU 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing, an update on identifying performance obligations and accounting for licenses of intellectual property. In May 2016, the FASB issued ASU 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients, which includes amendments for enhanced clarification of the guidance. In December 2016, the FASB issued ASU 2016-20, Technical Corrections and Improvements to Revenue from Contracts with Customers (Topic 606), which includes amendments of a similar nature to the items typically addressed in the technical corrections and improvements project. Lastly, in February 2017, the FASB issued ASU 2017-05, clarifying the scope of asset derecognition guidance and accounting for partial sales of nonfinancial assets to clarify the scope of ASC 610-20, Other Income - Gains and Losses from Derecognition of Nonfinancial Assets, and provide guidance on partial sales of nonfinancial assets. This ASU clarifies that the unit of account under ASU 610-20 is each distinct nonfinancial or in substance nonfinancial asset and that a financial asset that meets the definition of an "in substance nonfinancial asset" is within the scope of ASC 610-20. This ASU eliminates rules specifically addressing sales of real estate and removes exceptions to the financial asset derecognition model. The ASUs described above are effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. See Note 3. Revenue for further details.

New Accounting Pronouncements

Reporting Comprehensive Income

In February 2018, the FASB issued ASU 2018-02, Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from AOCI. The new guidance is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years and should be applied either in the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate income tax rate or law in U.S. Tax Reform is recognized. Early adoption is permitted. Current GAAP guidance requires that the effect of a change in tax laws or rates on deferred tax liabilities or assets to be included in income from continuing operations in the reporting period that includes the enactment date, even if the related income tax effects were originally charged or credited directly to AOCI. The new guidance allows a reclassification of AOCI to retained earnings for stranded tax effects resulting from U.S. Tax Reform. Also, the new guidance requires certain disclosures about stranded tax effects. The Company is currently in the process of evaluating the impact of this guidance on our consolidated financial statements and expects minimal impact.

Accounting for Leases

In February 2016, the FASB issued ASU 2016-02, Leases. The new standard establishes a right-of-use model that requires a lessee to record a right-of-use asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. A modified retrospective transition approach is required for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the consolidated financial statements, with certain practical expedients available. The Company has started evaluating its lease arrangements to determine the impact of this amendment on the financial statements. The evaluation includes an extensive review of the leases, which are primarily related to our vessels and office space. Additionally, the Company has begun tracking separate accounting records for leases entered into starting January 1, 2017 under the new guidance to facilitate future implementation. In January 2018, the FASB issued ASU 2018-01, Leases (Topic 842) - Land Easement Practical Expedient for Transition to Topic 842, which provides an optional transition practical expedient to not evaluate under Topic 842 existing or expired land easements that were not previously accounted for as leases under the current leases guidance in Topic 840. The effective date and transition requirements for ASU 2018-01 are the same as ASU 2016-02. Early adoption is permitted. The Company is continuing to evaluate the impact this standard will have on its financial statements. While not yet quantified, the Company expects a material impact to its Condensed Consolidated Balance Sheets from recognizing additional assets and liabilities of operating leases upon adoption. The actual increase in assets and liabilities will depend on the volume and terms of leases in place at the time of adoption. The Company plans to elect the optional practical expedient to retain the current classification of leases, and therefore, does not anticipate a material impact to the Condensed Consolidated Statements of Income or Cash Flows. The Company also expects that adoption of the new standard will require changes to internal controls over financial reporting.

Subsequent Events

ASC 855, Subsequent Events ("ASC 855"), establishes general standards of accounting and disclosure of events that occur after the balance sheet date but before financial statements are issued or available to be issued. ASC 855 requires HC2 to evaluate events that occur after the balance date as of which HC2's financial statements are issued, and to determine whether adjustments to or additional disclosures in the financial statements are necessary. HC2 has evaluated subsequent events through the date these financial statements were issued. See Note 22. Subsequent Events for the summary of the subsequent events.

Revenue

6 Months Ended

Jun. 30, 2018

Revenue from Contract with Customer [Abstract]

Revenue

3. Revenue

The Company adopted ASC 606 on January 1, 2018. The adoption of ASC 606 represents a change in accounting principle that aligns revenue recognition with the timing of when promised goods or services are transferred to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. To achieve this core principle, the Company applies the following five steps in accordance with ASC 606:

Identify the contract with a customer

A contract with a customer exists when: (a) the parties have approved the contract and are committed to perform their respective obligations, (b) the rights of the parties can be identified, (c) payment terms can be identified, (d) the arrangement has commercial substance, and (e) collectibility of consideration is probable. Judgment is required when determining if the contractual criteria are met, specifically in the earlier stages of a project when a formally executed contract may not yet exist. In these situations, the Company evaluates all relevant facts and circumstances, including the existence of other forms of documentation or historical experience with our customers that may indicate a contractual agreement is in place and revenue should be recognized. In determining if the collectibility of consideration is probable, the Company considers the customer’s ability and intention to pay such consideration through an evaluation of several factors, including an assessment of the creditworthiness of the customer and our prior collection history with such customer.

Identify the performance obligations in the contract

At contract inception, the Company assesses the goods or services promised in a contract and identifies, as a separate performance obligation, each distinct promise to transfer goods or services to the customer. The identified performance obligations represent the “unit of account” for purposes of determining revenue recognition. In order to properly identify separate performance obligations, the Company applies judgment in determining whether each good or service provided is: (a) capable of being distinct, whereby the customer can benefit from the good or service either on its own or together with other resources that are readily available to the customer, and (b) distinct within the context of the contract, whereby the transfer of the good or service to the customer is separately identifiable from other promises in the contract.

In addition, when assessing performance obligations within a contract, the Company considers the warranty provisions included within such contract. To the extent the warranty terms provide the customer with an additional service, other than assurance that the promised good or service complies with agreed upon specifications, such warranty is accounted for as a separate performance obligation. In determining whether a warranty provides an additional service, the Company considers each warranty provision in comparison to warranty terms which are standard in the industry.

Determine the transaction price

The transaction price represents the amount of consideration to which the Company expects to be entitled in exchange for transferring promised goods or services to our customers. The consideration promised within a contract may include fixed amounts, variable amounts, or both. To the extent the performance obligation includes variable consideration, including contract bonuses and penalties that can either increase or decrease the transaction price, the Company estimates the amount of variable consideration to be included in the transaction price utilizing one of two prescribed methods, depending on which method better predicts the amount of consideration to which the entity will be entitled. Such methods include: (a) the expected value method, whereby the amount of variable consideration to be recognized represents the sum of probability weighted amounts in a range of possible consideration amounts, and (b) the most likely amount method, whereby the amount of variable consideration to be recognized represents the single most likely amount in a range of possible consideration amounts. When applying these methods, the Company considers all information that is reasonably available, including historical, current and estimates of future performance.

Variable consideration is included in the transaction price only to the extent it is probable, in the Company’s judgment, that a significant future reversal in the amount of cumulative revenue recognized under the contract will not occur when the uncertainty associated with the variable consideration is subsequently resolved. This threshold is referred to as the variable consideration constraint. In assessing whether to apply the variable consideration constraint, the Company considers if factors exist that could increase the likelihood or the magnitude of a potential reversal of revenue, including, but not limited to, whether: (a) the amount of consideration is highly susceptible to factors outside of the Company’s influence, such as the actions of third parties, (b) the uncertainty surrounding the amount of consideration is not expected to be resolved for a long period of time, (c) the Company’s experience with similar types of contracts is limited or that experience has limited predictive value, (d) the Company has a practice of either offering a broad range of price concessions or changing the payment terms and conditions of similar contracts in similar circumstances, and (e) the contract has a large number and broad range of possible consideration amounts.

Pending change orders represent one of the most common forms of variable consideration included within contract value and typically represent contract modifications for which a change in scope has been authorized or acknowledged by our customer, but the final adjustment to contract price is yet to be negotiated. In estimating the transaction price for pending change orders, the Company considers all relevant facts, including documented correspondence with the customer regarding acknowledgment and/or agreement with the modification, as well as historical experience with the customer or similar contractual circumstances. Based upon this assessment, the Company estimates the transaction price, including whether the variable consideration constraint should be applied.

Changes in the estimates of transaction prices are recognized on a cumulative catch-up basis in the period in which the revisions to the estimates are made. Such changes in estimates can result in the recognition of revenue in a current period for performance obligations which were satisfied or partially satisfied in prior periods. Such changes in estimates may also result in the reversal of previously recognized revenue if the ultimate outcome differs from the Company’s previous estimate.

Allocate the transaction price to performance obligations in the contract

For contracts that contain multiple performance obligations, the Company allocates the transaction price to each performance obligation based on a relative standalone selling price. The Company determines the standalone selling price based on the price at which the performance obligation would have been sold separately in similar circumstances to similar customers. If the standalone selling price is not observable, the Company estimates the standalone selling price taking into account all available information such as market conditions and internal pricing guidelines. In certain circumstances, the standalone selling price is determined using an expected profit margin on anticipated costs related to the performance obligation.

Recognize revenue as performance obligations are satisfied

The Company recognizes revenue at the time the related performance obligation is satisfied by transferring a promised good or service to its customers. A good or service is considered to be transferred when the customer obtains control. The Company can transfer control of a good or service and satisfy its performance obligations either over time or at a point in time. The Company transfers control of a good or service over time and, therefore, satisfies a performance obligation and recognizes revenue over time if one of the following three criteria are met: (a) the customer simultaneously receives and consumes the benefits provided by the Company’s performance as we perform, (b) the Company’s performance creates or enhances an asset that the customer controls as the asset is created or enhanced, or (c) the Company’s performance does not create an asset with an alternative use to us, and we have an enforceable right to payment for performance completed to date.

For our performance obligations satisfied over time, we recognize revenue by measuring the progress toward complete satisfaction of that performance obligation. The selection of the method to measure progress towards completion can be either an input method or an output method and requires judgment based on the nature of the goods or services to be provided.

Revenue from contracts with customers consist of the following (in thousands):



	Three Months Ended June 30, 2018		Six Months Ended June 30, 2018
Revenue⁽¹⁾
Construction	$	176,910	$	335,851
Marine Services	68,376		105,098
Energy	7,078		11,580
Telecommunications	190,529		392,832
Broadcasting	11,089		21,745
Other	1,056		3,409
Total revenue	$	455,038	$	870,515

⁽¹⁾ The Insurance segment does not have revenues in scope of ASU 2014-09.

Accounts receivables, net from contracts with customers consist of the following (in thousands):



	June 30, 2018
Accounts receivables with customers
Construction	$	194,381
Marine Services	51,716
Energy	3,278
Telecommunications	80,223
Broadcasting	9,462
Other	3,988
Total accounts receivables with customers	$	343,048

Construction Segment

DBMG performs its services primarily under fixed-price contracts and recognizes revenue over time using the input method to measure progress for its projects. The nature of the projects does not provide measurable value to the customer over time and control does not transfer to the customer at discrete points in time. The customer receives value over the term of the project based on the amount of work that has been completed towards the delivery of the completed project. The most reliable measure of progress is the cost incurred towards delivery of the completed project. Therefore, the input method provides the most reliable method to measure progress. Revenue recognition begins when work has commenced. Costs include all direct material and labor costs related to contract performance, subcontractor costs, indirect labor, and fabrication plant overhead costs, which are charged to contract costs as incurred. Revenues relating to changes in the scope of a contract are recognized when DBMG and customer or general contractor have agreed on both the scope and price of changes, the work has commenced, it is probable that the costs of the changes will be recovered and that realization of revenue exceeding the costs is assured beyond a reasonable doubt. Revisions in estimates during the course of contract work are reflected in the accounting period in which the facts requiring the revision become known. Provisions for estimated losses on uncompleted contracts are made in the period a loss on a contract becomes determinable.

Construction contracts with customers generally provide that billings are to be made monthly in amounts which are commensurate with the extent of performance under the contracts. Contract receivables arise principally from the balance of amounts due on progress billings on jobs under construction. Retentions on contract receivables are amounts due on progress billings, which are withheld until the completed project has been accepted by the customer.

Disaggregation of Revenues

DBMG's revenues are principally derived from contracts to provide fabrication and erection services to its customers. Contracts represent majority of the revenue of the Construction segment and are generally recognized over time. A majority of contracts are domestic, fixed priced, and are in excess of one year. Disaggregation of the Construction segment, by market or type of customer, is used to evaluate its financial performance.

The following table disaggregates DBMG's revenue by market (in thousands):



	Three Months Ended June 30, 2018		Six Months Ended June 30, 2018
Commercial	$	67,790	$	137,441
Convention	22,177		53,828
Healthcare	29,245		57,086
Other	57,692		87,472
Total revenue from contracts with customers	176,904		335,827
Other revenue	6		24
Total Construction segment revenue	$	176,910	$	335,851

Contract Assets and Contract Liabilities

The timing of revenue recognition may differ from the timing of invoicing to customers. Contract assets include unbilled amounts from our long-term construction projects when revenue recognized under the cost-to-cost measure of progress exceed the amounts invoiced to our customers, as the amounts cannot be billed under the terms of our contracts. Such amounts are recoverable from our customers based upon various measures of performance, including achievement of certain milestones, completion of specified units or completion of a contract. In addition, many of our time and materials arrangements, as well as our contracts to perform turnaround services within the United States industrial services segment, are billed in arrears pursuant to contract terms that are standard within the industry, resulting in contract assets and/or unbilled receivables being recorded, as revenue is recognized in advance of billings. Also included in contract assets are amounts we seek or will seek to collect from customers or others for errors or changes in contract specifications or design, contract change orders or modifications in dispute or unapproved as to both scope and/or price or other customer-related causes of unanticipated additional contract costs (claims and unapproved change orders). Our contract assets do not include capitalized costs to obtain and fulfill a contract. Contract assets are included in Other assets in the Condensed Consolidated Balance Sheets.

Contract assets and contract liabilities consisted of the following (in thousands):



	June 30, 2018			December 31, 2017
Contract assets	$	32,871		$	25,676
Contract liabilities	$	(46,991	)	$	(29,862	)

The change in contract assets is a result of the recording of $30.3 million of costs in excess of billings driven by new commercial projects, offset by $23.1 million of costs in excess of billings transferred to receivables from contract assets recognized at the beginning of the period. The change in contract liabilities is a results of periodic billing in excess of costs of $46.0 million driven largely by new commercial projects, offset by revenue recognized that was included in the contract liability balance at the beginning of the period $28.9 million.

Transaction Price Allocated to Remaining Unsatisfied Performance Obligations

The transaction price allocated to remaining unsatisfied performance obligations consisted of the following (in thousands):



	Within one year		Within five years		Total
Commercial	$	161,867	$	—	$	161,867
Convention	138,511		15,000		153,511
Healthcare	66,253		—		66,253
Other	221,770		53,000		274,770
Remaining unsatisfied performance obligations	$	588,401	$	68,000	$	656,401

DBMG's remaining unsatisfied performance obligations, otherwise referred to as backlog, increase with awards of new contracts and decrease as it performs work and recognizes revenue on existing contracts. DBMG includes a project within its remaining unsatisfied performance obligations at such time the project is awarded and agreement on contract terms has been reached. DBMG's remaining unsatisfied performance obligations include amounts related to contracts for which a fixed price contract value is not assigned when a reasonable estimate of total transaction price can be made. DBMG expects to recognize this revenue over the next twenty-four months.

Remaining unsatisfied performance obligations include unrecognized revenues to be realized from uncompleted construction contracts. Although many of DBMG's contracts are subject to cancellation at the election of its customers, in accordance with industry practice, DBMG does not limit the amount of unrecognized revenue included within its remaining unsatisfied performance obligations due to the inherent substantial economic penalty that would be incurred by its customers upon cancellation.

Marine Services Segment

GMSL generally generates revenue by providing maintenance services for subsea telecommunications cabling, installing subsea cables, providing installation, maintenance and repair of fiber optic communication and power infrastructure to offshore oil and gas platforms, and installing inter-array power cables for use in offshore wind farms.

Telecommunication - Maintenance & Installation

GMSL performs its services within telecommunication market primarily under fixed-price contracts and recognizes revenue over time using the input method to measure progress for its projects. The nature of the projects does not provide measurable value to the customer over time and control does not transfer to the customer at discrete points in time. The customer receives value over the term of the project based on the amount of work that has been completed towards the delivery of the completed project. Depending on the project, the most reliable measure of progress is either the cost incurred or time elapsed towards delivery of the completed project. Therefore, the input method provides the most reliable method to measure progress. Revenue recognition begins when work has commenced. Costs include all direct material and labor costs related to contract performance, indirect labor, and overhead costs, which are charged to contract costs as incurred. Revisions in estimates during the course of contract work are reflected in the accounting period in which the facts requiring the revision become known. Provisions for estimated losses on uncompleted contracts are made in the period a loss on a contract becomes determinable.

Maintenance revenues within this market are attributable to standby vessels and the provision of cable storage depots for repair of fiber optic telecommunications cables in defined geographic zones, and its maintenance business is provided through contracts with consortia of approximately 60 global telecommunications providers. These contracts are generally five to seven years long.

Installation revenues within this market are generated through installation of cable systems including route planning, mapping, route engineering, cable laying, and trenching and burial. GMSL’s installation business is project-based with contracts typically lasting one to five months.

Power - Operations, Maintenance & Construction Support

Majority of revenues within this market are generated through the provision of crew transfer vessels and turbine technicians on the maintenance of offshore windfarms. Services are provided at agreed day rates and are recognized as revenues at the point in time at which the performance obligations are met. Additional revenues are generated through the provision of approved safety training courses to personnel operating on offshore wind turbines. Courses are supplied at agreed rates and recognized at the point in time at which the courses are provided.

Power - Cable Installation & Repair

Installation and repair revenues within this market are attributable to the provision of engineering solutions, which includes the charter of cable laying vessels and related subsea assets. These contracts are either charged at agreed day rates and are recognized as revenues at the point in time at which the performance obligations are met, or are under fixed-price contracts, in which case revenue is recognized over time using the input method to measure progress for its projects.

Disaggregation of Revenues

GMSL's revenues are principally derived from contracts to provide maintenance and installation services to its customers. Contracts represent a majority of revenues at the Marine Services segment of which approximately 73% and 72% we recognized over time during the three and six months ended June 30, 2018, respectively.

The following table disaggregates GMSL's revenue by market (in thousands):



	Three Months Ended June 30, 2018		Six Months Ended June 30, 2018
Telecommunication - Maintenance	$	22,090	$	43,872
Telecommunication - Installation	16,498		23,796
Power - Operations, Maintenance & Construction Support	11,923		16,585
Power - Cable Installation & Repair	17,865		20,845
Total revenue from contracts with customers	68,376		105,098
Other revenue	—		—
Total Marine Services segment revenue	$	68,376	$	105,098

Contract Assets and Contract Liabilities

The timing of revenue recognition may differ from the timing of invoicing to customers. Contract assets include unbilled amounts from our long-term projects when revenue recognized exceeds the amounts invoiced to our customers, as the amounts cannot be billed under the terms of our contracts. Such amounts are recoverable from our customers based upon various measures of performance, including achievement of certain milestones, completion of specified units or completion of a contract. In addition, many of our time and materials arrangements, as well as our contracts to perform services are billed in arrears pursuant to contract terms that are standard within the industry, resulting in contract assets and/or unbilled receivables being recorded, as revenue is recognized in advance of billings. Contract assets are included in Other assets in the Condensed Consolidated Balance Sheets.

Contract liabilities from our long-term construction contracts occur when amounts invoiced to our customers exceed revenues recognized. Contract liabilities additionally include advanced payments from our customers on certain contracts. Contract liabilities decrease as we recognize revenue from the satisfaction of the related performance obligation. Contract liabilities are included in Other liabilities in the Condensed Consolidated Balance Sheets.

Contract assets and contract liabilities consisted of the following (in thousands):



	June 30, 2018			December 31, 2017
Contract assets	$	16,687		$	6,610
Contract liabilities	$	(214	)	$	(3,106	)

Transaction Price Allocated to Remaining Unsatisfied Performance Obligations

The transaction price allocated to remaining unsatisfied performance obligations consisted of the following (in thousands):



	Within one year		Within five years		Thereafter		Total
Telecommunication - Maintenance	$	36,567	$	262,025	$	40,836	$	339,428
Telecommunication - Installation	3,804		—		—		3,804
Power - Operations, Maintenance & Construction Support	12,285		10,913		3,734		26,932
Power - Cable Installation & Repair	1,993		—		—		1,993
Remaining unsatisfied performance obligations	$	54,649	$	272,938	$	44,570	$	372,157

GMSL's remaining unsatisfied performance obligations, otherwise referred to as backlog, increase with awards of new contracts and decrease as it performs work and recognizes revenue on existing contracts. GMSL includes a project within its remaining unsatisfied performance obligations at such time the project is awarded and agreement on contract terms has been reached. GMSL's remaining unsatisfied performance obligations include amounts related to contracts for which a fixed price contract value is not assigned when a reasonable estimate of total transaction price can be made.

Remaining unsatisfied performance obligations consist predominantly from projects within telecommunication maintenance market. These revenues are generated through long-term contracts for the provision of vessels and cable depots in maintaining and repairing subsea telecoms cables around the globe. Revenues are recognized over time to reflect both the duration that the vessels and depots are provided on standby duties and the amount of work that has been completed.

Energy Segment

ANG's revenues are principally derived from sales of compressed natural gas. ANG recognizes revenue from the sale of natural gas fuel primarily at the time the fuel is dispensed.

As a result of the Bipartisan Budget Act of 2018, signed into law on February 9, 2018, all Alternative Fuel Tax Credit ("AFETC") revenue for vehicle fuel ANG sold in 2017 was collected in the second quarter of 2018. Net revenue after customer rebates for such credits for 2017 were $2.6 million, which was recognized during the second quarter of 2018, the period in which the credit became available.

Disaggregation of Revenues

The following table disaggregates ANG's revenue by type (in thousands):



	Three Months Ended June 30, 2018		Six Months Ended June 30, 2018
Volume-related	$	4,059	$	8,123
Maintenance services	19		48
Total revenue from contracts with customers	4,078		8,171
RNG Incentives	367		742
Alternative Fuel Tax Credit	2,576		2,576
Other revenue	57		91
Total Energy segment revenue	$	7,078	$	11,580

Telecommunications Segment

ICS operates an extensive network of direct routes and offers premium voice communication services for carrying a mix of business, residential and carrier long-distance traffic, data and Internet traffic. Customers may have a bilateral relationship with ICS, meaning they have both a customer and vendor relationship with ICS. In these cases, ICS sells the customer access to the ICS network but also purchases access to the customer’s network.

Net revenue is derived from carrying business, residential and carrier long-distance traffic, and data traffic. For certain voice services, net revenue is earned based on the number of minutes during a call, and is recorded upon completion of a call. Completed calls are billable activity while incomplete calls are non-billable. Incomplete calls may occur as a result of technical issues or because the customer’s credit limit was exceeded and thus the customer routing of traffic was prevented.

Revenue for a period is calculated from information received through ICS’s network switches, such as minutes and market rates. Customized software has been designed to track the information from the switch and analyze the call detail records against stored detailed information about revenue rates. This software provides ICS with the ability to perform a timely and accurate analysis of revenue earned in a period.

Net revenue represents gross revenue, net of allowance for doubtful accounts receivable, service credits and service adjustments. Cost of revenue includes network costs that consist of access, transport and termination costs. The majority of ICS’s cost of revenue is variable, primarily based upon minutes of use, with transmission and termination costs being the most significant expense.

Disaggregation of Revenues

ICS's revenues is predominantly derived from wholesale of international long distance minutes (in thousands):



	Three Months Ended June 30, 2018		Six Months Ended June 30, 2018
Termination of long distance minutes	$	190,529	$	392,832
Total revenue from contracts with customers	190,529		392,832
Other revenue	—		—
Total Telecommunications segment revenue	$	190,529	$	392,832

Broadcasting Segment

Broadcasting advertising revenue is generated primarily from the sale of television airtime for programs or advertisements. Broadcasting advertising revenue is recognized when the program or advertisement is broadcast. Revenues are reported net of agency commissions, which are calculated as a stated percentage applied to gross billings. The broadcasting advertising contracts are generally short-term in nature.

Retransmission consent revenue consists of payments received from cable, satellite and other multiple video program distribution systems for their retransmission of our broadcast signals and generally based on per subscriber basis. Retransmission consent revenue is recognized as earned over the life of the retransmission consent contract and varies from month to month generally based on the average number of subscribers.

Local Marketing Agreements (“LMAs”) revenue is generated primarily from the sale of television airtime in return for a fixed fee or additional commission on the related sales incurred by the third party. In a typical LMA, the licensee of a station makes available, for a fee, airtime on its station to a party which supplies content to be broadcast during that airtime and collects revenue from advertising aired during such content. LMA revenue is recognized over the life of the contract, when the program is broadcast. The LMA fees that we charge can be fixed or commission-based and the LMA contracts that we enter into are generally short-term in nature.

Retransmission and LMA commission based revenues are usage/sales-based and recognized as revenue when the subsequent usage occurs. Transaction prices are based on the contract terms, with no material judgements or estimates.

The following table disaggregates the Broadcasting segment's revenue by type (in thousands):



	Three Months Ended June 30, 2018		Six Months Ended June 30, 2018
Advertising	$	7,016	$	13,764
LMA	2,796		5,489
Retransmission	907		1,850
Other	370		642
Total revenue from contracts with customers	11,089		21,745
Other revenue	—		—
Total Broadcasting segment revenue	$	11,089	$	21,745

Contract Liabilities

Audience deficiency units ("ADU") liability is recognized as an available return to customers as fulfillment for under-delivered guaranteed viewership per the related agreement. ADU balance was $1.3 million and $1.6 million as of June 30, 2018 and December 31, 2017, respectively. Broadcasting measures the potential obligation based on Nielsen ratings and cost per view, and is subsequently made whole in the following period.

Transaction Price Allocated to Remaining Unsatisfied Performance Obligations

The transaction price allocated to remaining unsatisfied performance obligations consisted of $8.8 million of advertising revenues of which $3.5 million is expected to be recognized within one year and $5.3 million is expected to be recognized within five years.

Other Segment

Our Other segment's revenues are driven by 704Games. 704Games derives revenue principally from sales of software games and related content and services on (1) consoles and (2) mobile devices. Console revenue includes revenue associated with the sale of 704Games' software games, whether delivered via a physical disc (e.g., packaged goods) or via the Internet (full-game downloads). Console revenue also includes in game purchases within the Xbox and PlayStation online stores (PlayStation, Xbox, or Apple/Google play). Mobile revenue includes revenue from 704Games' free to download (“freemium”) mobile game that requires 704Games' hosting support for micro-transactions (e.g. purchases for in game use). Sales are recognized as revenues at the point in time at which control had passed to the customer, either when physical discs are received by distributors or when digital goods are purchased.

704Games reduces revenue for estimated price reductions which may occur with its distributors and retailers. Price reductions represent 704Games' practice to provide a credit allowance to lower the wholesale price on a particular product to incentivize end consumer purchases. The amount of the price reduction is generally the difference between the original wholesale price and the reduced wholesale price.

The price protection reserve for estimated price reductions are recorded as a reduction of sales in the same period that the revenue is recognized. This reserve is a subjective critical estimate that has a direct impact on reported net revenues, and is calculated based on historical price concessions, estimated future price concessions and information provided by retailers regarding their inventory levels. 704Games' price protection reserves are classified as liabilities and included within Accounts Payable and Other Current Liabilities. 704Games continually monitors current pricing trends and wholesaler inventory levels to ensure the sales allowance is fairly stated.

Disaggregation of Revenues

The following table disaggregates the Other segment's revenue by type (in thousands):



	Three Months Ended June 30, 2018		Six Months Ended June 30, 2018
Digital	$	650	$	1,905
Disc	139		840
Mobile	267		664
Total revenue from contracts with customers	1,056		3,409
Other revenue	—		—
Total Other segment revenue	$	1,056	$	3,409

Acquisitions and Dispositions

6 Months Ended

Jun. 30, 2018

Business Combinations [Abstract]

Acquisitions and Dispositions

4. Acquisitions and Dispositions

Construction Segment

2017 Acquisitions

On November 1, 2017, DBMG consummated the acquisition of 100% of the shares of North American operations of Candraft VSI ("Candraft"). Candraft is a premier bridge infrastructure detailing and modeling company. On December 1, 2017, DBMG consummated the acquisition of the assets from Mountain States Steel, Inc. ("MSS") including inventory, machinery & equipment, real estate, employees and certain intangible assets. MSS is a premier custom structural steel fabricator for construction projects including bridges, stadiums and power plants. The aggregate fair value of the consideration paid in connection with the acquisitions of Candraft and MSS was $17.8 million, including $16.1 million in cash. Both transactions were accounted for as business acquisitions.

The fair value of consideration transferred and its allocation among the identified assets acquired, liabilities assumed, intangibles and residual goodwill are summarized as follows (in thousands):



Purchase price allocation
Accounts receivable	$	473
Property, plant and equipment	12,730
Goodwill	2,290
Intangibles	1,608
Other assets	909
Total assets acquired	18,010
Accounts payable and other current liabilities	(23		)
Other liabilities	(167		)
Total liabilities assumed	(190		)
Total net assets acquired	$	17,820

Goodwill was determined based on the residual differences between fair value of consideration transferred and the value assigned to tangible and intangible assets and liabilities. Among the factors that contributed to goodwill was approximately $1.5 million assigned to the assembled and trained workforce for 2017. Goodwill is not amortized and is not deductible for tax purposes.

Acquisition costs incurred by DMBG in 2017, in connection with the 2017 acquisitions were approximately $3.3 million, which were included in selling, general and administrative expenses. The acquisition costs were primarily related to legal, accounting and valuation services.

Results of acquired businesses were included in our Consolidated Statements of Operations since their respective acquisition dates. Pro forma results of operations have not been presented because they are not material to our consolidated results of operations.

Marine Services Segment

2017 Acquisitions

On November 30, 2017, GMSL acquired 5 assets and 19 employees and contractors based in Aberdeen, Scotland from Fugro N.V. The fair value of the purchase consideration was $87.2 million and comprised of 23.6% share in GMH LLC and a short-term loan of $7.5 million to Fugro N.V. The decision to acquire was made to support the overall group strategy of growing the Power and Oil & Gas businesses. The transaction was accounted for as a business acquisition.

The limited liability company agreement of GMH was amended and restated upon consummation of the Acquisition to reflect such issuance and to provide the Fugro Member with certain rights, including the right to designate two out of the up to seven members of its board of directors, the right to approve certain actions outside the ordinary course of business, certain "tag-along" rights to participate in sales of membership units by other members and, after five years and subject to the Fugro Member first offering its membership units to the other members at a price based upon independent valuations, the right to cause GMHL to be put up for sale in a process led by an investment banking firm.

Fair value of consideration transferred and its allocation among the identified assets acquired, liabilities assumed, intangibles, and residual goodwill are summarized as follows (in thousands):



Purchase price allocation
Cash and cash equivalents	$	2,212
Property, plant and equipment	73,320
Goodwill	11,783
Other assets	596
Total assets acquired	87,911
Accounts payable and other current liabilities	(676		)
Total liabilities assumed	(676		)
Total net assets acquired	$	87,235

Acquisition costs incurred by GMSL in 2017, in connection with the 2017 acquisition were approximately $1.8 million, which were included in selling, general and administrative expenses. The acquisition costs were primarily related to legal, accounting and valuation services.

Results of acquired businesses were included in our Consolidated Statements of Operations since their respective acquisition dates. Pro forma results of operations are also presented because the Fugro acquisition was material to our consolidated results of operations.

Broadcasting Segment

2018 Acquisitions

During the six months ended June 30, 2018, Broadcasting completed a series of transactions for a total cash consideration of $13.2 million. All transactions were accounted for as asset acquisitions.

The following table summarizes the allocation of the purchase price to the fair value of identifiable assets acquired, liabilities assumed, and intangibles (in thousands):



Purchase price allocation
Property, plant and equipment	$	721
Intangibles	12,446
Total assets acquired	13,167
Total liabilities assumed	—
Total net assets acquired	$	13,167

2017 Acquisitions

During the year ended December 31, 2017, Broadcasting and its subsidiaries completed the following transactions (in thousands):



	DTV		Mako		Azteca		Other		Total
Cash	$	13,467	$	18,192	$	—	$	12,104	$	43,763
Accounts payable	—		—		33,000		—		33,000
Equity	—		4,994		—		—		4,994
Debt obligations	2,405		5,250		—		—		7,655
Fair value of previously held interest	1,780		—		—		—		1,780
Fair value of consideration	$	17,652	$	28,436	$	33,000	$	12,104	$	91,192

In November 2017, Broadcasting closed a series of transactions that resulted in the ownership of over 50% of the shares of common stock of DTV for a total consideration of $17.7 million. DTV is an aggregator and operator of Low Power Television ("LPTV") licenses and stations across the United States. DTV currently owns and operates 52 LPTV stations in more than 40 cities. DTV’s distribution platform currently provides carriage for more than 30 television broadcast networks. DTV maintains a focus on technological innovation. DTV exclusively adopted Internet Protocol (IP) as a transport to provide Broadcast-as-a-Service, making it the only adopter of all IP-transport to the home. The transaction was accounted for as business acquisition.

In November 2017, HC2 LPTV Holdings Inc. ("HC2 LPTV"), a wholly-owned subsidiary of Broadcasting, closed on a transaction with Mako Communications, LLC and certain of its affiliates ("Mako") to purchase all the assets in connection with Mako’s ownership and operation of LPTV stations that resulted in HC2 acquiring 38 operating stations in 28 cities, for a total consideration of $28.4 million. Mako is a family owned and operated business headquartered in Corpus Christi, Texas, that has been acquiring, building, and maintaining Class A and LPTV stations all across the United States since 2000. The transaction was accounted for as business acquisition.

In November 2017, Network acquired Azteca America, a Spanish-language broadcast network, from affiliates of TV Azteca, S.A.B. de C.V. ("Azteca") (AZTECACPO.MX) (Latibex:XTZA). As part of the bifurcated transaction structure, a wholly-owned subsidiary of Broadcasting signed a definitive acquisition agreement with Northstar Media, LLC ("Northstar"), a licensee of numerous broadcast television licenses in the United States. Under the agreement with Northstar, a wholly-owned subsidiary of Broadcasting acquired Northstar’s broadcast television stations, which carry Azteca America programming. In February 2018, Broadcasting closed on the acquisition and funded the $33.0 million consideration balance. The transaction was accounted for as business acquisition.

In November and December of 2017, Broadcasting closed three additional acquisitions for a total consideration of $12.1 million. All three transactions were accounted for as asset acquisitions.

The following table summarizes the allocation of the purchase price to the fair value of identifiable assets acquired, liabilities assumed, intangibles and residual goodwill (in thousands):



Purchase price allocation
Cash and cash equivalents	$	61
Accounts receivable	9,134
Property, plant and equipment	12,097
Goodwill	21,402
Intangibles	80,378
Other assets	1,290
Total assets acquired	124,362
Accounts payable and other current liabilities	(8,036		)
Deferred tax liability	(6,072		)
Debt obligations ⁽¹⁾	(4,480		)
Other liabilities	(86		)
Total liabilities assumed	(18,674		)
Enterprise value	105,688
Less fair value of noncontrolling interest	14,496
Total net assets acquired	$	91,192

⁽¹⁾Debt obligations includes a $2.0 million note with CGI, which is eliminated on the Condensed Consolidated Balance Sheet.

The following table summarizes acquired intangible assets (in thousands):

Results of operations from acquisitions completed by Broadcasting segment since their respective acquisition dates have been included in our Consolidated Statements of Operations.

Life Sciences Segment

On June 8, 2018, Pansend closed on the sale of its approximately 75.9% ownership in BeneVir to Janssen Biotech, Inc. (“Janssen”). In conjunction with the closing of the transaction, Janssen made an upfront cash payment of $140.0 million. Pansend received a cash payment of $93.4 million and expects to receive an additional cash payment of $13.3 million, currently held in an escrow, for a total consideration of $106.7 million. Escrow will be released within fifteen months subsequent to the closing date, assuming there are no pending or unresolved indemnified claims. Pansend recorded a gain on the sale of $102.1 million, of which $21.7 million was allocated to noncontrolling interests. HC2 received a cash payment of $72.8 million and expects to receive an additional cash payment of $9.2 million upon the release of the escrow.

Under the terms of the merger agreement, Pansend is eligible to receive payments of up to $189.7 million upon the achievement of specified development milestones and up to $493.1 million upon the achievement of specified levels of annual net sales of licensed products. From these potential milestone payments, HC2 is eligible to receive up to $512.2 million.

Pro Forma Adjusted Summary

Disclosure of proforma information under ASC 805 related to the Azteca acquisition has not been provided as it would be impracticable to do so. After making every reasonable effort to do so, the Company is unable to obtain reliable historical GAAP financial statements for Azteca. Amounts would require estimates so significant as to render the disclosure irrelevant.

The following schedule presents unaudited consolidated pro forma results of operations data as if the acquisition of Fugro had occurred on January 1, 2017. This information does not purport to be indicative of the actual results that would have occurred if the acquisitions had actually been completed on the date indicated, nor is it necessarily indicative of the future operating results or the financial position of the combined company (in thousands):



	Three Months Ended June 30, 2017			Six Months Ended June 30, 2017
Net revenue	$	389,715		$	791,346
Net income (loss) from continuing operations	$	(22,825	)	$	(33,784	)
Net income (loss) attributable to HC2 Holdings, Inc.	$	(18,278	)	$	(33,141	)

Investments

6 Months Ended

Jun. 30, 2018

Investments, Debt and Equity Securities [Abstract]

Investments

5. Investments

Fixed Maturity Securities

The following tables provide information relating to investments in fixed maturity securities (in thousands):



June 30, 2018	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Fixed maturity securities
U.S. Government and government agencies	$	14,708	$	308	$	(205	)	$	14,811
States, municipalities and political subdivisions	362,775		9,644		(1,446		)	370,973
Residential mortgage-backed securities	86,850		4,909		(637		)	91,122
Commercial mortgage-backed securities	39,331		133		(506		)	38,958
Asset-backed securities	147,542		875		(2,022		)	146,395
Corporate and other	575,516		19,738		(8,260		)	586,994
Total fixed maturity securities	$	1,226,722	$	35,607	$	(13,076	)	$	1,249,253



December 31, 2017	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Fixed maturity securities
U.S. Government and government agencies	$	15,283	$	470	$	(31	)	$	15,722
States, municipalities and political subdivisions	377,549		18,953		(1,052		)	395,450
Foreign government	6,331		—		(333		)	5,998
Residential mortgage-backed securities	101,974		4,185		(1,264		)	104,895
Commercial mortgage-backed securities	30,152		269		(16		)	30,405
Asset-backed securities	145,479		2,610		(163		)	147,926
Corporate and other	589,803		51,891		(1,464		)	640,230
Total fixed maturity securities	$	1,266,571	$	78,378	$	(4,323	)	$	1,340,626

The Company has investments in mortgage-backed securities ("MBS") that contain embedded derivatives (primarily interest-only MBS) that do not qualify for hedge accounting. The Company recorded the change in the fair value of these securities within Net realized and unrealized gains on investments. These investments had a fair value of $11.6 million and $12.3 million as of June 30, 2018 and December 31, 2017, respectively. The change in fair value related to these securities resulted in a gain of $0.2 million and a loss of $0.7 million for the three months ended June 30, 2018 and 2017, respectively and gains of $0.7 million and a loss of $0.7 million for the six months ended June 30, 2018 and 2017, respectively.

Maturities of Fixed Maturity Securities Available-for-sale

The amortized cost and fair value of fixed maturity securities available-for-sale as of June 30, 2018 are shown by contractual maturity in the table below (in thousands). Actual maturities can differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Asset and mortgage-backed securities are shown separately in the table below, as they are not due at a single maturity date:



	Amortized Cost		Fair Value
Corporate, Municipal, U.S. Government and Other securities
Due in one year or less	$	13,753	$	13,600
Due after one year through five years	129,070		128,942
Due after five years through ten years	165,275		165,518
Due after ten years	644,901		664,718
Subtotal	952,999		972,778
Mortgage-backed securities	126,181		130,080
Asset-backed securities	147,542		146,395
Total	$	1,226,722	$	1,249,253

The tables below show the major industry types of the Company’s corporate and other fixed maturity securities (in thousands):



	June 30, 2018						December 31, 2017
	Amortized Cost		Fair Value		% of Total		Amortized Cost		Fair Value		% of Total
Finance, insurance, and real estate	$	215,159	$	215,813	36.8	%	$	191,234	$	203,735	31.8	%
Transportation, communication and other services	158,600		160,973		27.4	%	186,114		201,802		31.5	%
Manufacturing	97,192		101,014		17.2	%	100,942		111,391		17.4	%
Other	104,565		109,194		18.6	%	111,513		123,302		19.3	%
Total	$	575,516	$	586,994	100.0	%	$	589,803	$	640,230	100.0	%

A portion of certain other-than-temporary impairment ("OTTI") losses on fixed maturity securities is recognized in Accumulated Other Comprehensive Income ("AOCI"). For these securities the net amount, which is recognized in the Condensed Consolidated Statements of Operations in the below line items, represents the difference between the amortized cost of the security and the net present value of its projected future cash flows discounted at the effective interest rate implicit in the debt security prior to impairment. Any remaining difference between the fair value and amortized cost is recognized in AOCI. The Company recorded the following (in thousands):



	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Net realized and unrealized gains on investments	$	—	$	—	$	—	$	—
Other income (expenses), net	—		2,800		—		6,070
Total Other-Than-Temporary Impairments	$	—	$	2,800	$	—	$	6,070

The following table presents the total unrealized losses for the 245 and 126 fixed maturity securities held by the Company as of June 30, 2018 and December 31, 2017, respectively, where the estimated fair value had declined and remained below amortized cost by the indicated amount (in thousands):



	June 30, 2018					December 31, 2017
	Unrealized Losses			% of Total		Unrealized Losses			% of Total
Fixed maturity securities
Less than 20%	$	(12,836	)	98.2	%	$	(4,230	)	93.7	%
20% or more for less than six months	(240		)	1.8	%	(174		)	3.9	%
20% or more for six months or greater	—			—	%	(110		)	2.4	%
Total	$	(13,076	)	100.0	%	$	(4,514	)	100.0	%

The determination of whether unrealized losses are "other-than-temporary" requires judgment based on subjective as well as objective factors. Factors considered and resources used by management include (i) whether the unrealized loss is credit-driven or a result of changes in market interest rates, (ii) the extent to which fair value is less than cost basis, (iii) cash flow projections received from independent sources, (iv) historical operating, balance sheet and cash flow data contained in issuer SEC filings and news releases, (v) near-term prospects for improvement in the issuer and/or its industry, (vi) third party research and communications with industry specialists, (vii) financial models and forecasts, (viii) the continuity of dividend payments, maintenance of investment grade ratings and hybrid nature of certain investments, (ix) discussions with issuer management, and (x) ability and intent to hold the investment for a period of time sufficient to allow for anticipated recovery in fair value.

The Company analyzes its MBS for OTTI each quarter based upon expected future cash flows. Management estimates expected future cash flows based upon its knowledge of the MBS market, cash flow projections (which reflect loan-to-collateral values, subordination, vintage and geographic concentration) received from independent sources, implied cash flows inherent in security ratings and analysis of historical payment data.

The Company believes it will recover its cost basis in the non-impaired securities with unrealized losses and that the Company has the ability to hold the securities until they recover in value. The Company neither intends to sell nor does it expect to be required to sell the securities with unrealized losses as of June 30, 2018. However, unforeseen facts and circumstances may cause the Company to sell fixed maturity and equity securities in the ordinary course of managing its portfolio to meet certain diversification, credit quality and liquidity guidelines.

The following tables present the estimated fair values and gross unrealized losses for the 245 and 126 fixed maturity and equity securities held by the Company that have estimated fair values below amortized cost as of each of June 30, 2018 and December 31, 2017, respectively. The Company does not have any OTTI losses reported in AOCI. These investments are presented by investment category and the length of time the related fair value has remained below amortized cost (in thousands):



June 30, 2018	Less than 12 months					12 months of greater					Total
June 30, 2018	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Fixed maturity securities
U.S. Government and government agencies	$	12,548	$	(205	)	$	—	$	—		$	12,548	$	(205	)
States, municipalities and political subdivisions	111,992		(1,081		)	6,978		(365		)	118,970		(1,446		)
Residential mortgage-backed securities	15,268		(552		)	1,459		(85		)	16,727		(637		)
Commercial mortgage-backed securities	35,308		(506		)	—		—			35,308		(506		)
Asset-backed securities	74,271		(1,836		)	3,740		(186		)	78,011		(2,022		)
Corporate and other	183,883		(6,068		)	24,439		(2,192		)	208,322		(8,260		)
Total fixed maturity securities	$	433,270	$	(10,248	)	$	36,616	$	(2,828	)	$	469,886	$	(13,076	)



December 31, 2017	Less than 12 months					12 months of greater					Total
December 31, 2017	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Fixed maturity securities
U.S. Government and government agencies	$	5,044	$	(17	)	$	2,199	$	(14	)	$	7,243	$	(31	)
States, municipalities and political subdivisions	32,939		(834		)	10,757		(218		)	43,696		(1,052		)
Foreign government	—		—			5,999		(333		)	5,999		(333		)
Residential mortgage-backed securities	5,139		(546		)	16,150		(718		)	21,289		(1,264		)
Commercial mortgage-backed securities	5,053		(12		)	1,003		(4		)	6,056		(16		)
Asset-backed securities	19,771		(64		)	3,963		(99		)	23,734		(163		)
Corporate and other	18,478		(824		)	19,433		(640		)	37,911		(1,464		)
Total fixed maturity securities	$	86,424	$	(2,297	)	$	59,504	$	(2,026	)	$	145,928	$	(4,323	)

As of June 30, 2018, investment grade fixed maturity securities (as determined by nationally recognized rating agencies) represented approximately 54.7% of the gross unrealized loss and 61.0% of the fair value. As of December 31, 2017, investment grade fixed maturity securities represented approximately 7.3% of the gross unrealized loss and 10.4% of the fair value. Certain risks are inherent in connection with fixed maturity securities, including loss upon default, price volatility in reaction to changes in interest rates, and general market factors and risks associated with reinvestment of proceeds due to prepayments or redemptions in a period of declining interest rates.

Equity Securities

Beginning in 2018 upon adopting ASU 2016-01, changes in fair value of equity securities are reported in Net realized and unrealized gains (losses) on investments. The following tables provide information relating to investments in equity securities measured at fair value (in thousands):



	June 30, 2018		December 31, 2017
Equity securities
Common stocks	$	9,329	$	4,928
Perpetual preferred stocks	70,228		42,572
Total equity securities	$	79,557	$	47,500

Other Invested Assets

Beginning in 2018 upon adopting ASU 2016-01, certain investments in equity securities that do not have a readily determinable fair value are carried at cost minus impairment, if any, plus or minus changes resulting from observable price changes or at fair value. Carrying values of other invested assets were as follows (in thousands):



	June 30, 2018						December 31, 2017
	Measurement Alternative		Equity Method		Fair Value		Cost Method		Equity Method		Fair Value
Common Equity	$	—	$	1,750	$	—	$	—	$	1,484	$	—
Preferred Equity	1,600		11,794		—		2,484		14,197		—
Derivatives	—		—		280		422		—		260
Joint Ventures	—		70,685		—		—		66,572		—
Total	$	1,600	$	84,229	$	280	$	2,906	$	82,253	$	260

Summarized financial information for subsidiaries not consolidated as of and for the six months ended June 30, 2018 and 2017 were as follows (information for two of the investees is reported on a one month lag, in thousands):



	2018			2017
Net revenue	$	201,207		$	247,398
Gross profit	$	70,678		$	76,520
Income (loss) from continuing operations	$	10,628		$	(5,903	)
Net income (loss)	$	(2,699	)	$	(19,868	)

Current assets	$	363,745		$	308,876
Noncurrent assets	$	182,730		$	192,156
Current liabilities	$	230,303		$	209,526
Noncurrent liabilities	$	159,917		$	122,891

Net Investment Income

The major sources of net investment income were as follows (in thousands):



	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Fixed maturity securities, available-for-sale at fair value	$	16,242		$	15,550		$	31,887		$	29,475
Equity securities	677			574			1,262			1,249
Mortgage loans	1,648			564			2,853			1,028
Policy loans	280			291			557			589
Other invested assets	524			3			597			7
Gross investment income	19,371			16,982			37,156			32,348
External investment expense	(29		)	(43		)	(90		)	(105		)
Net investment income	$	19,342		$	16,939		$	37,066		$	32,243

Net Realized and Unrealized Gains (Losses) on Investments

The major sources of net realized and unrealized gains and losses on investments were as follows (in thousands):



	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Realized gains on fixed maturity securities	$	2,407		$	2,424		$	3,720		$	3,385
Realized losses on fixed maturity securities	(550		)	(462		)	(1,265		)	(917		)
Realized gains on equity securities	—			110			—			110
Realized losses on equity securities	(26		)	(31		)	(26		)	(31		)
Net unrealized gains (losses) on equity securities	478			—			(191		)	—
Net unrealized gains (losses) on derivative instruments	185			(946		)	705			(671		)
Net realized and unrealized gains (losses)	$	2,494		$	1,095		$	2,943		$	1,876

Fair Value of Financial Instruments

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

6. Fair Value of Financial Instruments

Assets by Hierarchy Level

Assets and liabilities measured at fair value on a recurring basis are summarized below (in thousands):



June 30, 2018			Fair Value Measurement Using:
June 30, 2018	Total		Level 1		Level 2		Level 3
Assets
Fixed maturity securities
U.S. Government and government agencies	$	14,811	$	4,899	$	9,912	$	—
States, municipalities and political subdivisions	370,973		—		370,564		409
Residential mortgage-backed securities	91,122		—		78,855		12,267
Commercial mortgage-backed securities	38,958		—		16,907		22,051
Asset-backed securities	146,395		—		13,651		132,744
Corporate and other	586,994		2,081		517,621		67,292
Total fixed maturity securities	1,249,253		6,980		1,007,510		234,763
Equity securities
Common stocks	9,329		8,846		—		483
Perpetual preferred stocks	70,228		7,474		38,389		24,365
Total equity securities	79,557		16,320		38,389		24,848
Derivatives	280		—		—		280
Total assets accounted for at fair value	$	1,329,090	$	23,300	$	1,045,899	$	259,891



Liabilities
Warrant liability	$	3,316	$	—	$	—	$	3,316
Other	907		—		—		907
Total liabilities accounted for at fair value	$	4,223	$	—	$	—	$	4,223



December 31, 2017			Fair Value Measurement Using:
December 31, 2017	Total		Level 1		Level 2		Level 3
Assets
Fixed maturity securities
U.S. Government and government agencies	$	15,722	$	5,094	$	10,628	$	—
States, municipalities and political subdivisions	395,450		—		389,439		6,011
Foreign government	5,998		—		5,998		—
Residential mortgage-backed securities	104,895		—		90,283		14,612
Commercial mortgage-backed securities	30,405		—		18,248		12,157
Asset-backed securities	147,926		—		14,184		133,742
Corporate and other	640,230		2,098		611,844		26,288
Total fixed maturity securities	1,340,626		7,192		1,140,624		192,810
Equity securities
Common stocks	4,928		4,771		—		157
Perpetual preferred stocks	42,572		7,665		28,470		6,437
Total equity securities	47,500		12,436		28,470		6,594
Derivatives	260		—		—		260
Total assets accounted for at fair value	$	1,388,386	$	19,628	$	1,169,094	$	199,664



Liabilities
Warrant liability	$	3,826	$	—	$	—	$	3,826
Other	944		—		—		944
Total liabilities accounted for at fair value	$	4,770	$	—	$	—	$	4,770

The Company reviews the fair value hierarchy classifications each reporting period. Changes in the observability of the valuation attributes may result in a reclassification of certain financial assets or liabilities. Such reclassifications are reported as transfers in and out of Level 3, or between other levels, at the beginning fair value for the reporting period in which the changes occur. The Company transferred $5.1 million of equity securities between Level 1 and Level 2 during the six months ended June 30, 2018, reflecting the level of market activity in these instruments. There were no transfers between Level 1 and Level 2 during the three and six months ended June 30, 2017.

Availability of secondary market activity and consistency of pricing from third-party sources impacts the Company's ability to classify securities as Level 2 or Level 3. The Company’s assessment resulted in a net transfer into Level 3 of $12.3 million primarily related to structured securities during the six months ended June 30, 2018. The Company’s assessment resulted in a net transfer out of Level 3 of $79.5 million primarily related to structured securities during the six months ended June 30, 2017.

The methods and assumptions the Company uses to estimate the fair value of assets and liabilities measured at fair value on a recurring basis are summarized below:

Fixed Maturity Securities. The fair values of the Company’s publicly-traded fixed maturity securities are generally based on prices obtained from independent pricing services. Prices from pricing services are sourced from multiple vendors, and a vendor hierarchy is maintained by asset type based on historical pricing experience and vendor expertise. In some cases, the Company receives prices from multiple pricing services for each security, but ultimately uses the price from the pricing service highest in the vendor hierarchy based on the respective asset type. Consistent with the fair value hierarchy described above, securities with validated quotes from pricing services are generally reflected within Level 2, as they are primarily based on observable pricing for similar assets and/or other market observable inputs.

If the Company ultimately concludes that pricing information received from the independent pricing service is not reflective of market activity, non-binding broker quotes are used, if available. If the Company concludes the values from both pricing services and brokers are not reflective of market activity, it may override the information from the pricing service or broker with an internally developed valuation, however, this occurs infrequently. Internally developed valuations or non-binding broker quotes are also used to determine fair value in circumstances where vendor pricing is not available. These estimates may use significant unobservable inputs, which reflect the Company’s assumptions about the inputs that market participants would use in pricing the asset. Pricing service overrides, internally developed valuations and non-binding broker quotes are generally based on significant unobservable inputs and are reflected as Level 3 in the valuation hierarchy.

The inputs used in the valuation of corporate and government securities include, but are not limited to, standard market observable inputs which are derived from, or corroborated by, market observable data including market yield curve, duration, call provisions, observable prices and spreads for similar publicly traded or privately traded issues that incorporate the credit quality and industry sector of the issuer.

For structured securities, valuation is based primarily on matrix pricing or other similar techniques using standard market inputs including spreads for actively traded securities, spreads off benchmark yields, expected prepayment speeds and volumes, current and forecasted loss severity, rating, weighted average coupon, weighted average maturity, average delinquency rates, geographic region, debt-service coverage ratios and issuance-specific information including, but not limited to: collateral type, payment terms of the underlying assets, payment priority within the tranche, structure of the security, deal performance and vintage of loans.

When observable inputs are not available, the market standard valuation techniques for determining the estimated fair value of certain types of securities that trade infrequently, and therefore have little or no price transparency, rely on inputs that are significant to the estimated fair value but that are not observable in the market or cannot be derived principally from or corroborated by observable market data. These unobservable inputs are sometimes based in large part on management judgment or estimation, and cannot be supported by reference to market activity. Even though unobservable, these inputs are based on assumptions deemed appropriate given the circumstances and are believed to be consistent with what other market participants would use when pricing such securities.

The fair values of private placement securities are primarily determined using a discounted cash flow model. In certain cases, these models primarily use observable inputs with a discount rate based upon the average of spread surveys collected from private market intermediaries who are active in both primary and secondary transactions, taking into account, among other factors, the credit quality and industry sector of the issuer and the reduced liquidity associated with private placements. Generally, these securities have been reflected within Level 3. For certain private fixed maturities, the discounted cash flow model may also incorporate significant unobservable inputs, which reflect the Company’s own assumptions about the inputs market participants would use in pricing the security. To the extent management determines that such unobservable inputs are not significant to the price of a security, a Level 2 classification is made. Otherwise, a Level 3 classification is used.

Equity Securities. The balance consists principally of common and preferred stock of publicly and privately traded companies. The fair values of publicly traded equity securities are primarily based on quoted market prices in active markets and are classified within Level 1 in the fair value hierarchy. The fair values of preferred equity securities, for which quoted market prices are not readily available, are based on prices obtained from independent pricing services and these securities are generally classified within Level 2 in the fair value hierarchy. The fair value of common stock of privately held companies was determined using unobservable market inputs, including volatility and underlying security values and was classified as Level 3.

Cash Equivalents. The balance consists of money market instruments, which are generally valued using unadjusted quoted prices in active markets that are accessible for identical assets and are primarily classified as Level 1. Various time deposits carried as cash equivalents are not measured at estimated fair value and, therefore, are excluded from the tables presented.

Derivatives. The balance consists of common stock purchase warrants and call options. The fair values of the call options are primarily based on quoted market prices in active markets and are classified within Level 1 in the fair value hierarchy. Depending on the terms, the common stock warrants were valued using either Black-Scholes analysis or Monte Carlo Simulation. Fair value was determined using unobservable market inputs, including volatility and underlying security values. As such, the common stock purchase warrants were classified as Level 3.

Warrant Liability. The balance represents warrants issued in connection with the acquisition of the Insurance business and recorded within other liabilities on the Condensed Consolidated Balance Sheets. Fair value was determined using the Monte Carlo Simulation because the adjustments for exercise price and warrant shares represent path dependent features; the exercise price from comparable periods needs to be known to determine whether a subsequent sale of shares occurs at a price that is lower than the current exercise price. The analysis entails a Geometric Brownian Motion based simulation of 100 unique price paths of the Company's stock for each combination of assumptions. Fair value was determined using unobservable market inputs, including volatility, and a range of assumptions regarding a possibility of an equity capital raise each year and the expected size of future equity capital raises. The present value of a given simulated scenario was based on intrinsic value at expiration discounted to the valuation date, taking into account any adjustments to the exercise price or warrant shares issuable. The average present value across all 100 independent price paths represents the estimate of fair value for each combination of assumptions. Therefore, the warrant liability was classified as Level 3.

Level 3 Measurements and Transfers

The following tables summarize changes to the Company’s financial instruments carried at fair value and classified within Level 3 of the fair value hierarchy for the three and six months ended June 30, 2018 and 2017, respectively (in thousands):



				Total realized/unrealized gains (losses) included in
	Balance at March 31, 2018				Net earnings (loss)			Other comp. income (loss)				Purchases and issuances		Sales and settlements				Transfer to Level 3		Transfer out of Level 3			Balance at June 30, 2018
Assets
Fixed maturity securities
States, municipalities and political subdivisions		$	6,427		$	(1	)		$	(8	)	$	—		$	—		$	—	$	(6,009	)	$	409
Residential mortgage-backed securities		7,249			32				282			—			(826		)	5,530		—			12,267
Commercial mortgage-backed securities		17,751			(39		)		(166		)	4,524			(19		)	—		—			22,051
Asset-backed securities		137,888			460				(1,768		)	18,500			(19,402		)	—		(2,934		)	132,744
Corporate and other		37,595			20				(858		)	23,876			(2,528		)	9,187		—			67,292
Total fixed maturity securities		206,910			472				(2,518		)	46,900			(22,775		)	14,717		(8,943		)	234,763
Equity securities
Common stocks		606			(123		)		—			—			—			—		—			483
Perpetual preferred stocks		23,910			455				—			—			—			—		—			24,365
Total equity securities		24,516			332				—			—			—			—		—			24,848
Derivatives		270			10				—			—			—			—		—			280
Total financial assets		$	231,696		$	814			$	(2,518	)	$	46,900		$	(22,775	)	$	14,717	$	(8,943	)	$	259,891



				Total realized/unrealized (gains) losses included in
	Balance at March 31, 2018			Net (earnings) loss			Other comp. (income) loss			Purchases and issuances		Sales and settlements			Transfer to Level 3		Transfer out of Level 3		Balance at June 30, 2018
Liabilities
Warrant liability		$	2,828	$	488			$	—	$	—		$	—	$	—	$	—	$	3,316
Other		1,233		(326		)		—		—			—		—		—		907
Total financial liabilities		$	4,061	$	162			$	—	$	—		$	—	$	—	$	—	$	4,223



				Total realized/unrealized gains (losses) included in
	Balance at December 31, 2017				Net earnings (loss)			Other comp. income (loss)				Purchases and issuances		Sales and settlements				Transfer to Level 3		Transfer out of Level 3			Balance at June 30, 2018
Assets
Fixed maturity securities
States, municipalities and political subdivisions		$	6,011		$	—			$	(132	)	$	121		$	—		$	418	$	(6,009	)	$	409
Residential mortgage-backed securities		14,612			124				619			—			(5,267		)	5,530		(3,351		)	12,267
Commercial mortgage-backed securities		12,157			(79		)		(264		)	10,276			(39		)	—		—			22,051
Asset-backed securities		133,742			1,158				(3,276		)	68,000			(63,946		)	—		(2,934		)	132,744
Corporate and other		26,288			45				(870		)	29,014			(2,895		)	15,710		—			67,292
Total fixed maturity securities		192,810			1,248				(3,923		)	107,411			(72,147		)	21,658		(12,294		)	234,763
Equity securities
Common stocks		157			(123		)		—			—			—			449		—			483
Perpetual preferred stocks		6,437			455				—			14,943			—			2,530		—			24,365
Total equity securities		6,594			332				—			14,943			—			2,979		—			24,848
Derivatives		260			20				—			—			—			—		—			280
Total financial assets		$	199,664		$	1,600			$	(3,923	)	$	122,354		$	(72,147	)	$	24,637	$	(12,294	)	$	259,891



				Total realized/unrealized (gains) losses included in
	Balance at December 31, 2017			Net (earnings) loss			Other comp. (income) loss			Purchases and issuances		Sales and settlements			Transfer to Level 3		Transfer out of Level 3		Balance at June 30, 2018
Liabilities
Warrant liability		$	3,826	$	(510	)		$	—	$	—		$	—	$	—	$	—	$	3,316
Other		944		(37		)		—		—			—		—		—		907
Total financial liabilities		$	4,770	$	(547	)		$	—	$	—		$	—	$	—	$	—	$	4,223



				Total realized/unrealized gains (losses) included in
	Balance at March 31, 2017			Net earnings (loss)			Other comp. income (loss)				Purchases and issuances		Sales and settlements				Transfer to Level 3			Transfer out of Level 3			Balance at June 30, 2017
Assets
Fixed maturity securities
U.S. Government and government agencies		$	15	$	—			$	—		$	—		$	—			$	—	$	(15	)		$	—
States, municipalities and political subdivisions		6,598		(111		)		(840		)	227			—				1,636		—				7,510
Residential mortgage-backed securities		53,737		(148		)		(9		)	3,417			(3,804		)		2,163		(36,871		)		18,485
Commercial mortgage-backed securities		35,973		(119		)		92			—			(2,752		)		—		(29,440		)		3,754
Asset-backed securities		87,160		(23		)		1,990			53,546			(11,341		)		—		(11,734		)		119,598
Corporate and other		26,720		(55		)		(1,769		)	4,933			(4,098		)		1,312		(6,504		)		20,539
Total fixed maturity securities		210,203		(456		)		(536		)	62,123			(21,995		)		5,111		(84,564		)		169,886
Equity securities
Common stocks		3,531		(2,842		)		1,401			—			—				—		—				2,090
Total equity securities		3,531		(2,842		)		1,401			—			—				—		—				2,090
Derivatives		3,694		(1,539		)		—			—			—				—		—				2,155
Total financial assets		$	217,428	$	(4,837	)		$	865		$	62,123		$	(21,995	)		$	5,111	$	(84,564	)		$	174,131



				Total realized/unrealized (gains) losses included in
	Balance at March 31, 2017			Net (earnings) loss			Other comp. (income) loss			Purchases and issuances		Sales and settlements			Transfer to Level 3			Transfer out of Level 3		Balance at June 30, 2017
Liabilities
Warrant liability		$	4,223	$	(132	)		$	—	$	—		$	—		$	—	$	—		$	4,091
Contingent liability		11,642		88				—		—			—			—		—			11,730
Other		675		367				—		—			—			—		—			1,042
Total financial liabilities		$	16,540	$	323			$	—	$	—		$	—		$	—	$	—		$	16,863



				Total realized/unrealized gains (losses) included in
	Balance at December 31, 2016			Net earnings (loss)			Other comp. income (loss)				Purchases and issuances		Sales and settlements				Transfer to Level 3			Transfer out of Level 3			Balance at June 30, 2017
Assets
Fixed maturity securities
U.S. Government and government agencies		$	32	$	—			$	—		$	—		$	(17	)		$	—	$	(15	)		$	—
States, municipalities and political subdivisions		5,690		—				(43		)	227			—				1,636		—				7,510
Residential mortgage-backed securities		55,954		(743		)		879			3,465			(6,362		)		2,163		(36,871		)		18,485
Commercial mortgage-backed securities		43,018		115				75			—			(10,014		)		—		(29,440		)		3,754
Asset-backed securities		73,217		1,051				307			81,271			(24,514		)		—		(11,734		)		119,598
Corporate and other		20,366		(3,322		)		4,872			7,933			(4,118		)		1,312		(6,504		)		20,539
Total fixed maturity securities		198,277		(2,899		)		6,090			92,896			(45,025		)		5,111		(84,564		)		169,886
Equity securities
Common stocks		4,575		(2,842		)		357			—			—				—		—				2,090
Total equity securities		4,575		(2,842		)		357			—			—				—		—				2,090
Derivatives		3,813		(1,658		)		—			—			—				—		—				2,155
Total financial assets		$	206,665	$	(7,399	)		$	6,447		$	92,896		$	(45,025	)		$	5,111	$	(84,564	)		$	174,131



				Total realized/unrealized (gains) losses included in
	Balance at December 31, 2016			Net (earnings) loss		Other comp. (income) loss			Purchases and issuances		Sales and settlements			Transfer to Level 3			Transfer out of Level 3		Balance at June 30, 2017
Liabilities
Warrant liability		$	4,058	$	33		$	—	$	—		$	—		$	—	$	—		$	4,091
Contingent liability		11,411		319			—		—			—			—		—			11,730
Other		816		226			—		—			—			—		—			1,042
Total financial liabilities		$	16,285	$	578		$	—	$	—		$	—		$	—	$	—		$	16,863

Internally developed fair values of Level 3 assets represent less than 1% of the Company’s total assets. Any justifiable changes in unobservable inputs used to determine internally developed fair values would not have a material impact on the Company’s financial position.

Fair Value of Financial Instruments Not Measured at Fair Value

The following table presents the carrying amounts and estimated fair values of the Company’s financial instruments, which were not measured at fair value on a recurring basis. The table excludes carrying amounts for cash, accounts receivable, costs and recognized earnings in excess of billings, accounts payable, accrued expenses, billings in excess of costs and recognized earnings, and other current assets and liabilities approximate fair value due to relatively short periods to maturity (in thousands):



June 30, 2018					Fair Value Measurement Using:
June 30, 2018	Carrying Value		Estimated Fair Value		Level 1		Level 2		Level 3
Assets
Mortgage loans	$	69,890	$	69,890	$	—	$	—	$	69,890
Policy loans	17,768		17,768		—		17,768		—
Other invested assets	1,600		1,600		—		—		1,600
Total assets not accounted for at fair value	$	89,258	$	89,258	$	—	$	17,768	$	71,490
Liabilities
Annuity benefits accumulated ⁽¹⁾	$	237,373	$	237,373	$	—	$	—	$	237,373
Debt obligations ⁽²⁾	624,326		631,626		—		631,626		—
Total liabilities not accounted for at fair value	$	861,699	$	868,999	$	—	$	631,626	$	237,373



December 31, 2017					Fair Value Measurement Using:
December 31, 2017	Carrying Value		Estimated Fair Value		Level 1		Level 2		Level 3
Assets
Mortgage loans	$	52,109	$	52,110	$	—	$	—	$	52,110
Policy loans	17,944		17,944		—		17,944		—
Other invested assets	2,906		3,757		—		—		3,757
Total assets not accounted for at fair value	$	72,959	$	73,811	$	—	$	17,944	$	55,867
Liabilities
Annuity benefits accumulated ⁽¹⁾	$	243,156	$	240,361	$	—	$	—	$	240,361
Debt obligations ⁽²⁾	544,211		552,413		—		552,413		—
Total liabilities not accounted for at fair value	$	787,367	$	792,774	$	—	$	552,413	$	240,361

⁽¹⁾Excludes life contingent annuities in the payout phase.

⁽²⁾ Excludes certain lease obligations accounted for under ASC 840, Leases.

Mortgage Loans on Real Estate. The fair value of mortgage loans on real estate is estimated by discounting cash flows, both principal and interest, using current interest rates for mortgage loans with similar credit ratings and similar remaining maturities. As such, inputs include current treasury yields and spreads, which are based on the credit rating and average life of the loan, corresponding to the market spreads. The valuation of mortgage loans on real estate is considered Level 3 in the fair value hierarchy.

Policy Loans. The policy loans are reported at the unpaid principal balance and carry a fixed interest rate. The Company determined that the carrying value approximates fair value because (i) policy loans present no credit risk as the amount of the loan cannot exceed the obligation due upon the death of the insured or surrender of the underlying policy; (ii) there is no active market for policy loans (i.e., there is no commonly available exit price to determine the fair value of policy loans in the open market); (iii) policy loans are intricately linked to the underlying policy liability and, in many cases, policy loan balances are recovered through offsetting the loan balance against the benefits paid under the policy; and (iv) policy loans can be repaid by policyholders at any time, and this prepayment uncertainty reduces the potential impact of a difference between amortized cost (carrying value) and fair value. The valuation of policy loans is considered Level 2 in the fair value hierarchy.

Annuity Benefits Accumulated. The fair value of annuity benefits was determined using the surrender values of the annuities and classified as Level 3.

Long-term Obligations. The fair value of the Company’s long-term obligations was determined using Bloomberg Valuation Service BVAL. The methodology combines direct market observations from contributed sources with quantitative pricing models to generate evaluated prices and classified as Level 2.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Accounts Receivable, net

6 Months Ended

Jun. 30, 2018

Receivables [Abstract]

Accounts Receivable, net

7. Accounts Receivable, net

Accounts receivable, net consist of the following (in thousands):



	June 30, 2018			December 31, 2017
Contracts in progress	$	189,056		$	167,809
Trade receivables	94,559			106,937
Unbilled retentions	64,043			50,957
Other receivables	3,654			476
Allowance for doubtful accounts	(4,610		)	(3,733		)
Total accounts receivable, net	$	346,702		$	322,446

- Definition

The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.

+ References + Details

Recoverable from Reinsurers

6 Months Ended

Jun. 30, 2018

Insurance [Abstract]

Recoverable from Reinsurers

8. Recoverable from Reinsurers

Recoverable from reinsurers consists of the following (in thousands):



		June 30, 2018				December 31, 2017
Reinsurer	A.M. Best Rating	Amount		% of Total		Amount		% of Total
Hannover Life Reassurance Co	A+	$	336,435	63.4	%	$	336,852	64.0	%
Loyal American Life Insurance Co (Cigna)	A-	143,086		26.9	%	140,552		26.7	%
Great American Life Insurance Co	A	51,748		9.7	%	48,933		9.3	%
Total		$	531,269	100.0	%	$	526,337	100.0	%

Property, Plant and Equipment, net

6 Months Ended

Jun. 30, 2018

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment, net

9. Property, Plant and Equipment, net

Property, plant and equipment consists of the following (in thousands):



	June 30, 2018		December 31, 2017
Land	$	30,271	$	30,313
Building and leasehold improvements	37,911		34,632
Plant and transportation equipment	9,301		6,631
Cable-ships and submersibles	250,968		251,840
Equipment, furniture and fixtures, and software	142,223		127,409
Construction in progress	6,370		19,927
	477,044		470,752
Less: Accumulated depreciation	108,130		96,092
Total	$	368,914	$	374,660

Depreciation expense was $11.1 million and $8.5 million for the three months ended June 30, 2018 and 2017, respectively. These amounts included $1.7 million and $1.3 million of depreciation expense within cost of revenue for the three months ended June 30, 2018 and 2017, respectively.

Depreciation expense was $22.3 million and $16.8 million for the six months ended June 30, 2018 and 2017, respectively. These amounts included $3.3 million and $2.5 million of depreciation expense within cost of revenue for the six months ended June 30, 2018 and 2017, respectively.

Total net book value of equipment, cable-ships, and submersibles under capital leases consisted of $42.2 million and $45.3 million as of June 30, 2018 and December 31, 2017, respectively.

Goodwill and Intangibles, net

6 Months Ended

Jun. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangibles, net

10. Goodwill and Intangibles, net

Goodwill

The changes in the carrying amount of goodwill by segment were as follows (in thousands):



	Construction			Marine Services		Energy		Telecom		Insurance		Life Sciences			Broadcasting			Other		Total
Balance at December 31, 2017		$	38,607	$	14,251	$	2,122	$	3,378	$	47,290	$	3,620			$	20,678	$	1,795	$	131,741
Measurement period adjustment		—		—		—		—		—		—				725		—		725
Disposition		—		—		—		—		—		(3,620		)		—		—		(3,620		)
Balance at June 30, 2018		$	38,607	$	14,251	$	2,122	$	3,378	$	47,290	$	—			$	21,403	$	1,795	$	128,846

An interim goodwill impairment evaluation was performed on each reporting unit as of June 30, 2018. After considering all quantitative and qualitative factors, the Company has determined that it is more likely than not that the reporting units' fair values exceed carrying values as of the period end.

Through the sale of BeneVir in 2018, of $3.6 million of goodwill was deconsolidated. See Note 4. Acquisitions and Dispositions, for additional detail regarding our acquisitions and dispositions.

Indefinite-lived Intangible Assets

Balances of Indefinite-lived Intangible Assets as of June 30, 2018 and December 31, 2017 were as follows (in thousands):



	June 30, 2018		December 31, 2017
State licenses	$	2,450	$	2,450
FCC licenses	88,196		76,490
Developed technology	—		6,392
Total	$	90,646	$	85,332

Through the sale of BeneVir in 2018, $6.4 million of developed technology were sold to a third party. See Note 4. Acquisitions and Dispositions, for additional detail regarding our acquisitions and dispositions.

The Broadcasting segment strategically acquires assets across the United States, which results in the recording of FCC licenses. As long as the Company acts within the requirements and constraints of the regulatory authorities, the renewal and extension of these licenses is reasonably certain at minimal costs. Accordingly we have concluded that the acquired FCC licenses are indefinite-lived intangible assets.

In 2018, FCC licenses increased $11.7 million, $12.4 million through acquisitions, offset by $0.6 million of measurement period adjustments and $0.1 million of impairments, driven by licenses dismissed by the FCC.

Definite Lived Intangible Assets

The gross carrying amount and accumulated amortization of amortizable intangible assets by major intangible asset class is as follows:



	Weighted-Average Original Useful Life	June 30, 2018							December 31, 2017
	Weighted-Average Original Useful Life	Gross Carrying Amount		Accumulated Amortization			Net		Gross Carrying Amount		Accumulated Amortization			Net
Trade names	11 Years	$	13,981	$	(5,166	)	$	8,815	$	13,981	$	(4,527	)	$	9,454
Customer relationships	12 Years	21,657		(5,646		)	16,011		21,657		(4,681		)	16,976
Developed technology	4 Years	3,823		(3,749		)	74		3,823		(3,601		)	222
Other	4 Years	5,378		(644		)	4,734		5,374		(253		)	5,121
Total		$	44,839	$	(15,205	)	$	29,634	$	44,835	$	(13,062	)	$	31,773

Amortization expense for definite lived intangible assets for the three months ended June 30, 2018 and 2017 was $1.1 million and $1.3 million, respectively, and was included in Depreciation and amortization in the Condensed Consolidated Statements of Operations.

Amortization expense for definite lived intangible assets for the six months ended June 30, 2018 and 2017 was $2.1 million and $2.7 million, respectively, and was included in Depreciation and amortization in the Condensed Consolidated Statements of Operations.

Life, Accident and Health Reserves

6 Months Ended

Jun. 30, 2018

Insurance [Abstract]

Life, Accident and Health Reserves

11. Life, Accident and Health Reserves

Life, accident and health reserves consist of the following (in thousands):



	June 30, 2018		December 31, 2017
Long-term care insurance reserves	$	1,487,477	$	1,453,442
Traditional life insurance reserves	98,380		99,951
Other accident and health insurance reserves	142,310		140,568
Total life, accident and health reserves	$	1,728,167	$	1,693,961

The following table sets forth changes in the liability for claims for the portion of our long-term care insurance reserves in scope of the ASU 2015-09 disclosure requirements (in thousands):



	Six Months Ended June 30,
	2018			2017
Beginning balance	$	243,454		$	226,970
Less: recoverable from reinsurers	(100,610		)	(97,858		)
Beginning balance, net	142,844			129,112
Incurred related to insured events of:
Current year	36,396			33,411
Prior years	2,643			(2,880		)
Total incurred	39,039			30,531
Paid related to insured events of:
Current year	(1,360		)	(1,584		)
Prior years	(25,250		)	(20,984		)
Total paid	(26,610		)	(22,568		)
Interest on liability for policy and contract claims	2,678			2,409
Ending balance, net	157,951			139,484
Add: recoverable from reinsurers	106,387			107,673
Ending balance	$	264,338		$	247,157

The company experienced an unfavorable claims reserve development of $2.6 million and a favorable claims reserve development of $2.9 million for the six months ended June 30, 2018 and 2017, respectively. The reserve deficiency is primarily attributed to policyholder behavior, where claimants were delaying the reporting of their claims more than recent history. The reserve sufficiency is being driven by claim terminations as the result of policyholder deaths that released significant reserves which is attributable to the normal volatility in the reserves, due to the number of claims that are currently open.

Accounts Payable and Other Current Liabilities

6 Months Ended

Jun. 30, 2018

Payables and Accruals [Abstract]

Accounts Payable and Other Current Liabilities

12. Accounts Payable and Other Current Liabilities

Accounts payable and other current liabilities consist of the following (in thousands):



	June 30, 2018		December 31, 2017
Accounts payable	$	100,200	$	119,236
Accrued expenses and other current liabilities	73,927		99,489
Accrued interconnection costs	75,665		73,383
Accrued payroll and employee benefits	35,778		44,312
Accrued interest	5,220		4,636
Accrued income taxes	5,549		6,436
Total accounts payable and other current liabilities	$	296,339	$	347,492

Debt Obligations

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Debt Obligations

13. Debt Obligations

Debt obligations consist of the following (in thousands):



	June 30, 2018			December 31, 2017
Corporate
11.0% Senior Secured Notes due in 2019	$	510,000		$	400,000
Construction
LIBOR plus 2.25% Notes, due in 2024⁽¹⁾	5,388			6,738
LIBOR plus 1.5%, due 2023 and 2025	41,697			19,670
Marine Services
Notes payable and revolving lines of credit, various maturity dates	31,406			23,748
Obligations under capital leases	44,025			48,500
Energy
4.5% Note due in 2022	11,900			12,454
5.00% Term Loan due in 2022	13,020			13,706
4.25% Seller Note due in 2022	1,714			2,336
LIBOR plus 3.0% Note	1,000			1,031
Other	869			996
Life Sciences
11.0% Secured Convertible Promissory Note Due in 2018	1,750			1,750
Broadcasting
LIBOR plus applicable margin Bridge Note, due in 2018	—			60,000
Notes payable, various maturity dates	10,006			10,135
Other
Notes payable, various maturity dates	—			54
Total	672,775			601,118
Issuance discount, net and deferred financing costs	(4,270		)	(7,946		)
Debt obligations	$	668,505		$	593,172

⁽¹⁾ The DBMG Facility was amended on July 24, 2018, increasing the availability of the borrowing base allowing DBMG to borrow an additional $10.0 million of the $70.0 million total line and bearing interest at LIBOR plus 2.5%. The temporary borrowing base increase and related interest expires on October 23, 2018.

Non-operating corporate

On May 7, 2018, the Company closed on $110.0 million aggregate principal amount of 11.0% Senior Secured Notes due 2019 (the “Notes”). The Notes were issued at a price of 102.0% of principal amount, which resulted in a premium of $2.2 million. The Company used the net proceeds from the issuance of the Notes to refinance the outstanding bridge loan (the "Bridge Loan") at our Broadcasting segment.

Construction

DBMG Credit Facilities

DBMG has a Credit and Security Agreement ("DBMG Facility") with Wells Fargo Credit, Inc. ("Wells Fargo"). Under the initial terms of the agreement, Wells Fargo agreed to advance up to a maximum amount of $50.0 million to DBMG, including up to $14.5 million of letters of credit (the "Revolving Line"). The Revolving Line has a floating interest rate based on LIBOR plus 2.0%, requires monthly interest payments, and matures in April 2019.

The DBMG Facility allows for the issuance by DBMG of additional loans in the form of notes of up to $10.0 million ("Real Estate Term Advance"), at LIBOR plus 2.5% and the issuance of a note payable of up to $15.0 million, ("Real Estate Term Advance 2") at LIBOR plus 2.5%, each as separate tranches of debt under the DBMG Facility.

The DBMG Facility was amended effective April 5, 2018, modifying the Revolving Line by increasing the maximum amount of the advance to $70.0 million, modifying the floating interest rate to LIBOR plus 1.5% and extending the maturity date through March 31, 2023. The amendment also created a $17.0 million long-term tranche under the $70.0 million Revolving Line with a maturity date of May 31, 2025. Additionally, The Real Estate Term Advance and Real Estate Advance 2 interest rates were modified to LIBOR plus 2.25% with a maturity date of April 30, 2024.

As of June 30, 2018, DBMG had drawn $41.7 million under the Revolving Line and had $8.8 million in outstanding letters of credit issued under the DBMG Facility, of which zero has been drawn. At June 30, 2018 there was $2.4 million outstanding under the Real Estate Term Advance and $2.9 million of borrowings outstanding under the Real Estate Term Advance 2.

Marine Services

On April 4, 2018, GMSL entered into a 7.49% fixed interest only loan, due April 3, 2019, with Shawbrook Bank Limited for £7.2 million, or approximately $9.4 million, the net proceeds used to fund capital expenditures, being mainly upgrades to cable ships, and working capital requirements on installation contracts.

Broadcasting

On February 4, 2018, the Broadcasting segment entered into a First Amendment to the $75.0 million Bridge Loan to finance acquisitions in the LPTV distribution market. The First Amendment to the Bridge Loan extends the agreement to add an additional $27.0 million in principal borrowing capacity to the existing credit agreement.

On February 6, 2018, the Broadcasting segment borrowed $42.0 million in principal amount of the Bridge Loan at LIBOR plus applicable margin, the net proceeds used to finance certain acquisitions, to pay fees, costs and expenses relating to the Bridge Loan, and for general corporate purposes.

The Bridge Loan of $102.0 million was repaid as part of the May 7, 2018 corporate financing transaction. As part of the transaction, the Broadcasting segment recorded a loss on extinguishment of debt of $2.5 million, which was recorded in Other income (expenses), net in the Condensed Consolidated Financial Statements.

Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	14. Income Taxes Income Tax (Expense) Benefit The Company used the Annual Effective Tax Rate ("ETR") approach of ASC 740-270, Interim Reporting, to calculate its 2018 interim tax provision. Income tax expense (benefit) was an expense of $9.5 million and a benefit of $2.0 million for the three months ended June 30, 2018 and 2017, respectively. The income tax expense recorded for the three months ended June 30, 2018 relates primarily to the projected expense as calculated under ASC 740 for taxpaying entities. The income tax expense generated from the sale of BeneVir will be offset by tax attributes for which a valuation allowance had been recorded. Therefore, there is no net income tax expense recorded in the income statement for the sale. The income tax benefit recorded for three months ended June 30, 2017 relates primarily to the appreciation of investments and the mix of income and losses by taxpaying entities, including the Insurance segment. Income tax was an expense of $11.1 million and $3.3 million for the six months ended June 30, 2018 and 2017, respectively. The income tax expense recorded for the six months ended June 30, 2018 relates to the projected expense as calculated under ASC 740 for taxpaying entities. The income tax expense generated from the sale of BeneVir will be offset by tax attributes for which a valuation allowance had been recorded. Therefore, there is no net income tax expense recorded in the income statement for the sale. Additionally, the tax benefits associated with losses generated by certain businesses have been reduced by a full valuation allowance as we do not believe it is more-likely-than-not that the losses will be utilized prior to expiration. The income tax expense recorded for June 30, 2017 relates to the projected expense as calculated under ASC 740 for taxpaying entities. Additionally, the tax benefits associated with losses generated by the HC2 Holdings, Inc. U.S. consolidated income tax return and certain other businesses have been reduced by a full valuation allowance as we do not believe it is more-likely-than-not that the losses will be utilized prior to expiration. As a result of the enactment of Public Law 115-97, known informally as the Tax Cuts and Jobs Act ("TCJA") on December 22, 2017, the SEC staff issued Staff Accounting Bulletin No. 118 ("SAB 118") to address the application of U.S. GAAP in situations when a registrant does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the TCJA. SAB 118 provides that the measurement period is complete when a company’s accounting is complete, but should not extend beyond one year from the enactment date. During the six months ended June 30, 2018, the Company has not recorded any measurement period adjustments to the provisional estimate recorded at December 31, 2017 for the TCJA. The accounting for the impact of the TCJA is expected to be completed by the fourth quarter of 2018. For the calendar year beginning January 1, 2018, we are subject to several provisions of the TCJA including computations under Global Intangible Low Taxed Income ("GILTI"), Base Erosion and Anti-Abuse Tax ("BEAT"), and the interest limitation rules, and we included the impact of each of these provisions in our overall tax expense for the six months ended June 30, 2018. The Company will continue to refine these calculations as we gather additional information and additional interpretive guidance is issued. NOL Limitation As of December 31, 2017, the Company has a U.S. net operating loss carryforward available to reduce future taxable income in the amount of $100.4 million, of which $77.8 million is subject to an annual limitation under Section 382 of the Internal Revenue Code. The Company expects to utilize a portion of the U.S. net operating loss carryforwards in 2018 as a result of the sale of BeneVir. Additionally, the Company has $108.3 million of U.S. net operating loss carryforwards from its subsidiaries that do not qualify to be included in the HC2 Holdings, Inc. U.S. consolidated income tax return. Unrecognized Tax Benefits The Company follows the provision of ASC 740-10, Income Taxes, which prescribes a comprehensive model for how a company should recognize, measure, present, and disclose in its financial statements uncertain tax positions that the Company has taken or expects to take on a tax return. The Company is subject to challenge from various taxing authorities relative to certain tax planning strategies, including certain intercompany transactions as well as regulatory taxes. Examinations The Company conducts business globally, and as a result, the Company or one or more of its subsidiaries files income tax returns in the United States federal jurisdiction and various state and foreign jurisdictions. In the normal course of business, the Company is subject to examination by taxing authorities throughout the world. The open tax years contain matters that could be subject to differing interpretations of applicable tax laws and regulations as they relate to the amount, character, timing or inclusion of revenue and expenses or the applicability of income tax credits for the relevant tax period. Given the nature of tax audits there is a risk that disputes may arise. Tax years 2002 - 2017 remain open for examination.

Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	15. Commitments and Contingencies Litigation The Company is subject to claims and legal proceedings that arise in the ordinary course of business. Such matters are inherently uncertain, and there can be no guarantee that the outcome of any such matter will be decided favorably to the Company or that the resolution of any such matter will not have a material adverse effect upon the Company’s Consolidated Financial Statements. The Company does not believe that any of such pending claims and legal proceedings will have a material adverse effect on its Consolidated Financial Statements. The Company records a liability in its Consolidated Financial Statements for these matters when a loss is known or considered probable and the amount can be reasonably estimated. The Company reviews these estimates each accounting period as additional information is known and adjusts the loss provision when appropriate. If a matter is both probable to result in a liability and the amounts of loss can be reasonably estimated, the Company estimates and discloses the possible loss or range of loss to the extent necessary for its Consolidated Financial Statements not to be misleading. If the loss is not probable or cannot be reasonably estimated, a liability is not recorded in its Consolidated Financial Statements. CGI Producer Litigation On November 28, 2016, CGI, a subsidiary of the Company, Great American Financial Resource, Inc. ("GAFRI"), American Financial Group, Inc., and CIGNA Corporation were served with a putative class action complaint filed by John Fastrich and Universal Investment Services, Inc. in The United States District Court for the District of Nebraska alleging breach of contract, tortious interference with contract and unjust enrichment. The plaintiffs contend that they were agents of record under various CGI policies and that CGI allegedly instructed policyholders to switch to other CGI products and caused the plaintiffs to lose commissions, renewals, and overrides on policies that were replaced. The complaint also alleges breach of contract claims relating to allegedly unpaid commissions related to premium rate increases implemented on certain long-term care insurance policies. Finally, the complaint alleges breach of contract claims related to vesting of commissions. On August 21, 2017 the Court dismissed the plaintiffs’ tortious interference with contract claim. CGI believes that the remaining allegations and claims set forth in the complaint are without merit and intends to vigorously defend against them. The case was set for voluntary mediation, which occurred on January 26, 2018. The Court stayed discovery pending the outcome of the mediation. On February 12, 2018, the parties notified the Court that mediation did not resolve the case and that the parties’ discussions regarding a possible settlement of the action were still ongoing. The Court held a status conference on March 22, 2018, during which the parties informed the Court that settlement negotiations remain ongoing. Nonetheless, the Court entered a scheduling order setting the case for trial during the week of October 15, 2019. Meanwhile, the parties’ continued settlement negotiations led to a tentative settlement. The parties are in the process of preparing a formal settlement agreement, which will be subject to Court approval. Further, the Company and CGI are seeking defense costs and indemnification for plaintiffs’ claims from GAFRI and Continental General Corporation ("CGC") under the terms of an Amended and Restated Stock Purchase Agreement ("SPA") related to the Company’s acquisition of CGI in December 2015. GAFRI and CGC rejected CGI’s demand for defense and indemnification and, on January 18, 2017, the Company and CGI filed a Complaint against GAFRI and CGC in the Superior Court of Delaware seeking a declaratory judgment to enforce their indemnification rights under the SPA. On February 23, 2017, GAFRI answered CGI’s complaint, denying the allegations. The dispute is ongoing and CGI intends to continue to pursue its right to a defense and indemnity under the SPA regardless of the tentative settlement in the class action. Meanwhile, the parties are currently involved in settlement negotiations. VAT assessment On February 20, 2017, and on August 15, 2017, the Company's subsidiary, ICS, received notices from Her Majesty’s Revenue and Customs office in the U.K. (the "HMRC") indicating that it was required to pay certain Value-Added Taxes ("VAT") for the 2015 and 2016 tax years. ICS disagrees with HMRC’s assessments on technical and factual grounds and intends to dispute the assessed liabilities and vigorously defend its interests. We do not believe the assessment to be probable and expect to prevail based on the facts and merits of our existing VAT position. DBMG Class Action On November 6, 2014, a putative stockholder class action complaint challenging the tender offer by which HC2 acquired approximately 721,000 of the outstanding common shares of DBMG was filed in the Court of Chancery of the State of Delaware, captioned Mark Jacobs v. Philip A. Falcone, Keith M. Hladek, Paul Voigt, Michael R. Hill, Rustin Roach, D. Ronald Yagoda, Phillip O. Elbert, HC2 Holdings, Inc., and Schuff International, Inc., Civil Action No. 10323 (the "Complaint"). On November 17, 2014, a second lawsuit was filed in the Court of Chancery of the State of Delaware, captioned Arlen Diercks v. Schuff International, Inc. Philip A. Falcone, Keith M. Hladek, Paul Voigt, Michael R. Hill, Rustin Roach, D. Ronald Yagoda, Phillip O. Elbert, HC2 Holdings, Inc., Civil Action No. 10359. On February 19, 2015, the court consolidated the actions (now designated as Schuff International, Inc. Stockholders Litigation) and appointed lead plaintiff and co-lead plaintiffs' counsel. The currently operative complaint was filed by Mark Jacobs. The pending complaint alleges, among other things, that in connection with the tender offer, the individual members of the DBMG Board of Directors and HC2, the controlling stockholder of DBMG, breached their fiduciary duties to members of the plaintiff class. Plaintiffs also assert that HC2 should be required to complete a short-form merger based upon plaintiffs' expectation that the Company would cash out the remaining public stockholders of DBMG following the completion of the tender offer. The complaint seeks rescission of the tender offer and/or compensatory damages, as well as attorney’s fees and other relief. The defendants filed answers to the complaint on July 30, 2015. The parties have been exploring alternative frameworks for a potential settlement. There can be no assurance that a settlement will be finalized or that the Delaware Courts would approve such a settlement even if the parties enter into a settlement agreement. If a settlement cannot be reached, the Company believes it has meritorious defenses and intends to vigorously defend this matter. Global Marine Dispute GMSL is in dispute with Alcatel-Lucent Submarine Networks Limited ("ASN") related to a Marine Installation Contract between the parties, dated March 11, 2016 (the "ASN Contract"). Under the ASN Contract, GMSL's obligations were to install and bury an optical fiber cable in Prudhoe Bay, Alaska. As of the date hereof, neither party has commenced legal proceedings. Pursuant to the ASN Contract any such dispute would be governed by English law and would be required to be brought in the English courts in London. ASN has alleged that GMSL committed material breaches of the ASN Contract, which entitles ASN to terminate the ASN Contract, take over the work themselves, and claim damages for their losses arising as a result of the breaches. The alleged material breaches include failure to use appropriate equipment and procedures to perform the work and failure to accurately estimate the amount of weather downtime needed. ASN has indicated to GMSL it has incurred $38.2 million in damages and $1.2 million in liquidated damages for the period from September 2016 to October 2016, plus interest and costs. GMSL believes that it has not breached the terms and conditions of the contract and also believes that ASN has not properly terminated the contract in a manner that would allow it to make a claim. However, ASN has ceased making payments to GMSL and as of June 30, 2018, the total sum of GMSL invoices raised and issued are $17.0 million, of which $8.1 million were settled by ASN and the balance of $8.9 million remains at risk. We believe that the allegations and claims by ASN are without merit, and that ASN is required to make all payments under unpaid invoices and we intend to defend our interests vigorously. Tax Matters Currently, the Canada Revenue Agency ("CRA") is auditing a subsidiary previously held by the Company. The Company intends to cooperate in audit matters. To date, CRA has not proposed any specific adjustments and the audit is ongoing.

Employee Retirement Plans

6 Months Ended

Jun. 30, 2018

Retirement Benefits [Abstract]

Employee Retirement Plans

16. Employee Retirement Plans

The following table presents the components of Net periodic benefit cost for the periods presented (in thousands):



	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Service cost - benefits earning during the period	$	—		$	—		$	—		$	—
Interest cost on projected benefit obligation	1,368			1,385			2,737			2,769
Expected return on assets	(1,935		)	(1,896		)	(3,869		)	(3,792		)
Actuarial gain	—			—			—			—
Foreign currency gain (loss)	(24		)	7			(49		)	14
Net periodic benefit cost (income)	$	(591	)	$	(504	)	$	(1,181	)	$	(1,009	)

For the six months ended June 30, 2018, $1.9 million of contributions have been made to the Company's pension plans, comprising $0.8 million of fixed contributions and $1.1 million of profit-related contributions (based on 2015 profits). The Company anticipates contributing an additional $2.2 million during 2018, comprising $1.8 million of fixed contributions and $0.4 million of profit-related contributions (based on 2016 profits).

Under a revised deficit recovery plan agreed between GMSL and the trustees of GMSL's pension plan dated March 20, 2018, which was subsequently submitted to the UK government’s Pension Regulator, contributions of approximately $13.1 million deferred from 2016 and 2017 due in December 2017 have been further deferred. To support this deferral, the Company has provided secured assets in the form of the CWind Phantom crew transfer vessel and two trenchers. Consistent with earlier recovery plans, the revised deficit recovery plan comprises three elements: fixed contributions, variable contributions (profit-related element) and variable contributions (dividend-related element), though the amounts and some definitions have been modified. The fixed contributions, payable in installments, comprise approximately $2.6 million in 2018, approximately $6.8 million in 2019, approximately $7.0 million in 2020, approximately $7.2 million in 2021 and approximately $3.1 million in 2022. The variable contributions (profit-related element) are calculated as 10% of GMSL's audited operating profit and paid two years in arrears in December each year from 2018. The variable contributions (dividend-related) equate to 50% of any future dividend paid by GMSL.

Share-based Compensation

6 Months Ended

Jun. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-based Compensation

17. Share-based Compensation

On April 11, 2014, HC2’s Board of Directors adopted the HC2 Holdings, Inc. Omnibus Equity Award Plan (the "2014 Plan"), which was originally approved at the annual meeting of stockholders held on June 12, 2014. On April 21, 2017, the Board of Directors, subject to stockholder approval, adopted the Amended and Restated 2014 Omnibus Equity Award Plan (the "Amended 2014 Plan"). The Amended 2014 Plan was approved by HC2's stockholders at the annual meeting of stockholders held on June 14, 2017. Subject to adjustment as provided in the Amended 2014 Plan, the Amended 2014 Plan authorized the issuance of 3,500,000 shares of common stock of HC2, plus any shares that again become available for awards under the 2014 Plan.

On April 20, 2018, the Board of Directors, subject to stockholder approval, adopted the Second Amended and Restated 2014 Omnibus Equity Award Plan (the "Second A&R 2014 Plan"). The Second A&R 2014 Plan was approved by HC2's stockholders at the annual meeting of stockholders held on June 13, 2018. Subject to adjustment as provided in the Second A&R 2014 Plan, the Second A&R 2014 Plan authorizes the issuance of up to 3,500,000 shares of common stock of HC2 plus any shares that again become available for awards under the 2014 Plan or the Amended 2014 Plan.

The Second A&R 2014 Plan provides that no further awards will be granted pursuant to the Amended 2014 Plan. However, awards previously granted under either the 2014 Plan or the Amended 2014 Plan will continue to be subject to and governed by the terms of the 2014 Plan and Amended 2014 Plan, respectively. The Compensation Committee of HC2's Board of Directors administers the 2014 Plan, the Amended 2014 Plan and the Second A&R 2014 Plan and has broad authority to administer, construe and interpret the plans.

The Second A&R 2014 Plan provides for the grant of awards of non-qualified stock options, incentive (qualified) stock options, stock appreciation rights, restricted stock awards, restricted stock units, other stock based awards, performance compensation awards (including cash bonus awards) or any combination of the foregoing. The Company typically issues new shares of common stock upon the exercise of stock options, as opposed to using treasury shares.

The Company follows guidance which addresses the accounting for share-based payment transactions whereby an entity receives employee services in exchange for either equity instruments of the enterprise or liabilities that are based on the fair value of the enterprise’s equity instruments or that may be settled by the issuance of such equity instruments. The guidance generally requires that such transactions be accounted for using a fair-value based method and share-based compensation expense be recorded, based on the grant date fair value, estimated in accordance with the guidance, for all new and unvested stock awards that are ultimately expected to vest as the requisite service is rendered.

The Company granted 662,769 and 331,616 options during the six months ended June 30, 2018 and 2017, respectively. The weighted average fair value at date of grant for options granted during the six months ended June 30, 2018, and 2017 was $2.91 and $2.72, respectively, per option. The fair value of each option grant was estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions shown as a weighted average for the year:



	Six Months Ended June 30,
	2018	2017
Expected option life (in years)	0.88 - 5.84	5.75 - 6.10
Risk-free interest rate	2.24 - 2.85%	1.84 - 2.22%
Expected volatility	47.51 - 47.89%	47.58 - 48.29%
Dividend yield	—%	—%

Total share-based compensation expense recognized by the Company and its subsidiaries under all equity compensation arrangements was $3.7 million and $1.1 million for the three months ended June 30, 2018 and 2017, respectively.

Total share-based compensation expense recognized by the Company and its subsidiaries under all equity compensation arrangements was $4.8 million and $2.6 million for the six months ended June 30, 2018 and 2017, respectively.

All grants are time based and vest either immediately or over a period established at grant. The Company recognizes compensation expense for equity awards, reduced by actual forfeitures, using the straight-line basis.

Restricted Stock

A summary of HC2’s restricted stock activity is as follows:



	Shares		Weighted Average Grant Date Fair Value
Unvested - December 31, 2017	1,588,406		$	5.36
Granted	2,073,612		$	6.21
Vested	(263,189	)	$	5.53
Forfeited	(162,660	)	$	5.70
Unvested - June 30, 2018	3,236,169		$	5.87

At June 30, 2018, the total unrecognized stock-based compensation expense related to unvested restricted stock was $14.9 million. The unrecognized compensation cost is expected to be recognized over the remaining weighted average period of 2.6 years.

Stock Options

A summary of HC2’s stock option activity is as follows:



	Shares		Weighted Average Exercise Price
Outstanding - December 31, 2017	6,989,856		$	6.57
Granted	662,769		$	5.45
Exercised	(102,242	)	$	4.92
Forfeited	(60,293	)	$	5.50
Expired	(157,434	)	$	9.00
Outstanding - June 30, 2018	7,332,656		$	6.45

Eligible for exercise	6,049,223		$	6.24

At June 30, 2018, the intrinsic value and average remaining life of the Company's outstanding options were $5.3 million and approximately 6.8 years, and intrinsic value and average remaining life of the Company's exercisable options were $5.0 million and approximately 6.5 years.

At June 30, 2018, total unrecognized stock-based compensation expense related to unvested stock options was $2.3 million. The unrecognized compensation cost is expected to be recognized over the remaining weighted average period of 2.2 years. There are 1,283,433 unvested stock options expected to vest, with a weighted average remaining life of 7.9 years, a weighted average exercise price of $7.42, and an intrinsic value of $0.3 million.

Equity

6 Months Ended

Jun. 30, 2018

Equity [Abstract]

Equity

18. Equity

Series A Preferred Stock and Series A-2 Preferred Stock

The Company’s preferred shares authorized, issued and outstanding consisted of the following:

Preferred Share Conversions

DG Conversion

On May 2, 2017, the Company entered into an agreement with DG Value Partners, LP and DG Value Partners II Master Funds LP, holders (collectively, "DG Value") of the Company's Series A Preferred Stock and Series A-1 Preferred Stock, to convert and exchange all of DG Value's 2,308 shares of Series A Preferred Stock and 1,000 shares of Series A-1 Preferred Stock into a total of 803,469 shares of the Company's common stock. 17,500 shares of common stock issued in the conversion were issued as consideration for the agreement by DG Value to convert its Preferred Stock. The fair value of the 17,500 shares was $0.1 million on the date of issuance and was recorded within Preferred stock and deemed dividends from conversion line item of the Consolidated Statements of Operations as a deemed dividend.

Luxor and Corrib Conversions

On August 2, 2016, the Company entered into separate agreements with each of Corrib Master Fund, Ltd. ("Corrib"), then a holder of 1,000 shares of Series A Preferred Stock, and certain investment entities managed by Luxor Capital Group, LP ( "Luxor"), that together then held 9,000 shares of Series A-1 Preferred Stock, that govern their respective Preferred Share Conversions. As part of the Corrib Preferred Share Conversion the Company also agreed to provide the following two forms of additional consideration for as long as the Preferred Stock remained entitled to receive dividend payments (the "Additional Share Consideration").

The Company agreed that in the event that Corrib and Luxor would have been entitled to any Participating Dividends payable, had they not converted the Preferred Stock (as defined in the respective Series A and Series A-1 Certificate of Designation), after the date of their Preferred Share conversion, then the Company will issue to Corrib and Luxor, on the date such Participating Dividends become payable by the Company, in a transaction exempt from the registration requirements of the Securities Act the number of shares of common stock equal to (a) the value of the Participating Dividends Corrib or Luxor would have received pursuant to Sections (2)(c) and (2)(d) of the respective Series A and Series A-1 Certificate of Designation, divided by (b) the Thirty Day VWAP (as defined in the respective Series A and Series A-1 Certificate of Designation) for the period ending two business days prior to the underlying event or transaction that would have entitled Corrib or Luxor to such Participating Dividend had Corrib’s or Luxor’s Preferred Stock remain unconverted.

Further, the Company agreed that it will issue to Corrib and Luxor, on each quarterly anniversary commencing May 29, 2017 (or, if later, the date on which the corresponding dividend payment is made to the holders of the outstanding Preferred Stock), through and until the Maturity Date (as defined in the respective Series A and Series A-1 Certificate of Designation), in a transaction exempt from the registration requirements of the Securities Act the number of shares of common stock equal to (a) 1.875% the Accrued Value (as defined in the respective Series A and Series A-1 Certificate of Designation) of Corrib’s or Luxor’s Preferred Stock as of the Closing Date (as defined in applicable Voluntary Conversion Agreements) divided by (b) the Thirty Day VWAP (as defined in the respective Series A and Series A-1 Certificate of Designation) for the period ending two business days prior to the applicable Dividend Payment Date (as defined in the respective Series A and Series A-1 Certificate of Designation).

For the six months ended June 30, 2018, 61,016 and 6,864 shares of the Company's common stock have been issued to Luxor and Corrib, respectively, in conjunction with the Conversion agreement.

The fair value of the Additional Share Consideration was valued by the Company at $0.4 million on the date of issuance and was recorded within Preferred stock and deemed dividends from conversion line item of the Consolidated Statements of Operations as a deemed dividend.

Preferred Share Dividends

During the three and six months ended June 30, 2018 and 2017, HC2's Board of Directors declared cash dividends with respect to HC2’s issued and outstanding Preferred Stock, as presented in the following table (in thousands):

2018



Declaration Date	March 31, 2018		June 30, 2018
Holders of Record Date	March 31, 2018		June 30, 2018
Payment Date	April 16, 2018		July 17, 2018
Total Dividend	$	500	$	500

2017



Declaration Date	March 31, 2017		June 30, 2017
Holders of Record Date	March 31, 2017		June 30, 2017
Payment Date	April 17, 2017		July 17, 2017
Total Dividend	$	563	$	500

Related Parties

6 Months Ended

Jun. 30, 2018

Related Parties

19. Related Parties

HC2

In January 2015, the Company entered into a services agreement (the "Services Agreement") with Harbinger Capital Partners, a related party of the Company, with respect to the provision of services that may include providing office space and operational support and each party making available their respective employees to provide services as reasonably requested by the other party, subject to any limitations contained in applicable employment agreements and the terms of the Services Agreement. The Company recognized $1.0 million and $0.9 million of expenses under the Services Agreement for each of the three months ended June 30, 2018 and 2017, respectively. The Company recognized $1.9 million and $1.9 million of expenses under the Services Agreement for each of the six months ended June 30, 2018 and 2017, respectively.

In addition, on June 25, 2018 the Company funded $0.8 million to Harbinger Capital Partners for a deposit in connection with its allocable portion of shared office space occupied by the Company.

GMSL

In November 2017, GMSL acquired the trenching a cable lay services business from Fugro N.V. ("Fugro"). As part of the transaction, Fugro became a 23.6% holder of GMSL's parent, Global Marine Holdings, LLC ("GMH"). GMSL, in the normal course of business, incurred expenses with Fugro for various survey and other contractual services. For the three months ended June 30, 2018, GMSL recognized $3.0 million of expenses for such services with Fugro. For the six months ended June 30, 2018, GMSL recognized $4.1 million of expenses for such services with Fugro.

As part of the Fugro trenching business acquisition in 2017, GMSL issued to Fugro a $7.5 million secured loan, which bears interest, payable quarterly, at 4% per annum through January 11, 2018, and at 10% per annum thereafter, and matures 363 days following the acquisition. GMSL recognized interest expense on the note of $0.2 million for the three months ended June 30, 2018 and $0.4 million for the six months ended June 30, 2018.

The parent company of GMSL, Global Marine Holdings, LLC, incurred management fees of $0.2 million and $0.2 million for the three months ended June 30, 2018 and 2017, respectively, and $0.3 million and $0.4 million for the six months ended June 30, 2018 and 2017, respectively.

GMSL also has transactions with several of their joint venture partners. A summary of transactions with such joint venture partners and balances outstanding are as follows (in thousands):



	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Net revenue	$	3,754	$	4,701	$	7,638	$	12,097
Operating expenses	$	606	$	1,080	$	1,038	$	4,831
Interest expense	$	335	$	349	$	686	$	696
Dividends	$	1,351	$	—	$	2,374	$	632



	June 30, 2018		December 31, 2017
Accounts receivable	$	4,425	$	8,654
Long-term obligations	$	31,542	$	35,289
Accounts payable	$	440	$	1,925

Life Sciences

In 2017, R2 issued secured convertible note of $1.5 million to a related party, Blossom Innovations, LLC. As of June 30, 2018, the note with Blossom Innovation, LLC had an outstanding balance of $1.5 million.

Broadcasting

As part of the acquisition of DTV in 2017, Broadcasting issued $2.4 million in Senior Secured Promissory Notes ("DTV Notes") to the sellers of DTV, such notes constituting a portion of the consideration delivered in connection with the transaction. Subsequent to the transaction, the sellers entered into consulting agreements with DTV. The DTV Notes bear interest on the outstanding principal balance at an annual rate of 7%, interest payments are due quarterly and the principal amount on the DTV Notes are due on November 9, 2020. As of June 30, 2018, the DTV Notes had an outstanding balance of $2.4 million.

Operating Segment and Related Information

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Operating Segment and Related Information

20. Operating Segment and Related Information

The Company currently has two primary reportable geographic segments - United States and United Kingdom. The Company has eight reportable operating segments based on management’s organization of the enterprise - Construction, Marine Services, Energy, Telecommunications, Insurance, Life Sciences, Broadcasting, Other, and a Non-operating Corporate segment. Net revenue and long-lived assets by geographic segment is reported on the basis of where the entity is domiciled. All inter-segment revenues are eliminated. The Company's revenue concentrations of 10% and greater are as follows:



		Three Months Ended June 30,		Six Months Ended June 30,
	Segment	2018	2017	2018	2017
Customer A	Telecommunications	11.9%	*	11.3%	*

* Less than 10% revenue concentration

Summary information with respect to the Company’s geographic and operating segments is as follows (in thousands):



	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Net Revenue by Geographic Region
United States	$	423,020	$	338,404	$	835,413	$	680,509
United Kingdom	65,390		36,033		101,798		70,725
Other	8,369		4,215		13,258		17,986
Total	$	496,779	$	378,652	$	950,469	$	769,220



	Three Months Ended June 30,					Six Months Ended June 30,
	2018			2017		2018			2017
Net revenue
Construction	$	176,910		$	138,906	$	335,851		$	251,628
Marine Services	68,376			36,386		105,098			80,565
Energy	7,078			4,095		11,580			8,382
Telecommunications	190,529			160,584		392,832			352,333
Insurance	43,750			38,269		83,950			74,295
Broadcasting	11,089			—		21,745			—
Other	1,056			412		3,409			2,017
Eliminations ⁽¹⁾	(2,009		)	—		(3,996		)	—
Total net revenue	496,779			378,652		950,469			769,220



Income (loss) from operations
Construction	11,780			7,982			17,873			13,713
Marine Services	2,755			(7,274		)	(4		)	(1,545		)
Energy	1,508			(449		)	861			(623		)
Telecommunications	1,138			2,064			2,132			3,649
Insurance	3,943			2,959			6,949			3,228
Life Sciences	(6,548		)	(3,607		)	(9,796		)	(6,730		)
Broadcasting	(8,351		)	—			(16,065		)	—
Other	(1,239		)	(4,268		)	(1,427		)	(5,781		)
Non-operating Corporate	(8,495		)	(8,602		)	(15,804		)	(16,134		)
Eliminations⁽¹⁾	(2,009		)	—			(3,996		)	—
Total loss from operations	(5,518		)	(11,195		)	(19,277		)	(10,223		)
Interest expense	(17,181		)	(12,073		)	(36,506		)	(26,188		)
Gain on sale of subsidiary	102,141			—			102,141			—
Income from equity investees	10,752			4,003			5,521			11,696
Other income (expenses), net	(968		)	(3,193		)	124			(8,334		)
Income (loss) from continuing operations before income taxes	89,226			(22,458		)	52,003			(33,049		)
Income tax (expense) benefit	(9,462		)	1,985			(11,093		)	(3,306		)
Net income (loss)	79,764			(20,473		)	40,910			(36,355		)
Less: Net (income) loss attributable to noncontrolling interest and redeemable noncontrolling interest	(24,398		)	2,562			(20,540		)	3,948
Net income (loss) attributable to HC2 Holdings, Inc.	55,366			(17,911		)	20,370			(32,407		)
Less: Preferred stock and deemed dividends from conversions	703			793			1,406			1,376
Net income (loss) attributable to common stock and participating preferred stockholders	$	54,663		$	(18,704	)	$	18,964		$	(33,783	)

⁽¹⁾ The Insurance segment revenues are inclusive of mark-to-market adjustments in the amount of $2.0 million and$4.0 million for the three and six months ended June 30, 2018 respectively, recorded on equity securities in accordance with ASU 2016-01. Such adjustments related to consolidated subsidiaries are eliminated in consolidation.



	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Depreciation and Amortization
Construction	$	1,665		$	1,240		$	3,192		$	2,880
Marine Services	6,429			5,255			13,257			10,340
Energy	1,359			1,381			2,703			2,629
Telecommunications	87			94			173			191
Insurance ⁽²⁾	(1,320		)	(1,063		)	(2,254		)	(2,121		)
Life Sciences	53			41			111			79
Broadcasting	743			—			1,448			—
Other	21			331			42			661
Non-operating Corporate	20			16			41			33
Total	$	9,057		$	7,295		$	18,713		$	14,692

⁽²⁾ Balance includes amortization of negative VOBA, which increases net income.



	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Capital Expenditures ⁽³⁾
Construction	$	2,817	$	3,398	$	4,162	$	7,212
Marine Services	7,549		2,103		14,099		4,732
Energy	388		1,791		1,212		4,441
Telecommunications	7		10		107		40
Insurance	—		105		273		383
Life Sciences	29		147		50		198
Broadcasting	184		—		287		—
Other	8		50		8		13
Non-operating Corporate	8		2		36		—
Total	$	10,990	$	7,606	$	20,234	$	17,019

⁽³⁾The above capital expenditures exclude assets acquired under terms of capital lease and vendor financing obligations.



	June 30,			December 31,
	2018			2017
Investments
Construction	$	165		$	250
Marine Services	70,521			66,322
Insurance	1,455,183			1,493,589
Life Sciences	16,874			17,771
Other	2,433			1,518
Eliminations	(42,599		)	(35,852		)
Total	$	1,502,577		$	1,543,598



	June 30,		December 31,
	2018		2017
Property, Plant and Equipment—Net
United States	$	159,123	$	162,788
United Kingdom	203,787		204,866
Other	6,004		7,006
Total	$	368,914	$	374,660



	June 30,			December 31,
	2018			2017
Total Assets
Construction	$	381,886		$	342,806
Marine Services	399,994			389,500
Energy	80,864			83,607
Telecommunications	102,492			114,445
Insurance	2,085,429			2,117,045
Life Sciences	36,967			31,485
Broadcasting	145,430			136,690
Other	3,742			2,674
Non-operating Corporate	60,131			35,291
Eliminations	(42,599		)	(35,852		)
Total	$	3,254,336		$	3,217,691

Basic and Diluted Income (Loss) Per Common Share

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Basic and Diluted Income (Loss) Per Common Share

21. Basic and Diluted Income (Loss) Per Common Share

Earnings per share ("EPS") is calculated using the two-class method, which allocates earnings among common stock and participating securities to calculate EPS when an entity's capital structure includes either two or more classes of common stock or common stock and participating securities. Unvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are participating securities. As such, shares of any unvested restricted stock of the Company are considered participating securities. The dilutive effect of options and their equivalents (including non-vested stock issued under stock-based compensation plans), is computed using the "treasury" method as this measurement was determined to be more dilutive between the two available methods in each period.

The following potential common shares were excluded from diluted EPS for the three and six months ended June 30, 2018 as the shares were antidilutive: 2,019,972 for outstanding warrants to purchase the Company's stock and 4,787,602 for convertible preferred stock.

The Company had no dilutive common share equivalents during the three and six months ended June 30, 2017, due to the results of operations being a loss from continuing operations, net of tax.

The following table presents a reconciliation of net income (loss) used in basic and diluted EPS calculations (in thousands, except per share amounts):



	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Net income (loss) attributable to common stock and participating preferred stockholders	$	54,663		$	(18,704	)	$	18,964		$	(33,783	)
Earnings allocable to common shares:
Numerator for basic and diluted earnings per share
Participating shares at end of period:
Weighted-average Common stock outstanding	44,180			42,691			44,114			42,322
Unvested Restricted Stock	399			—			317			—
Preferred stock (as-converted basis)	4,787			—			4,787			—
Total	49,366			42,691			49,218			42,322

Percentage of loss allocated to:
Common stock	89.5		%	100.0		%	89.6		%	100.0		%
Unvested Restricted Stock	0.8		%	—		%	0.6		%	—		%
Preferred stock	9.7		%	—		%	9.7		%	—		%

Net Income (loss) attributable to Common stock, Basic	$	48,921		$	(18,704	)	$	16,997		$	(33,783	)

Distributed and Undistributed earnings to Common Shareholders:
Effect of assumed shares under treasury stock method for stock options and restricted shares	$	120		$	—		$	36		$	—
Income from the dilutive impact of subsidiary securities	(28		)	—			—			—
Net Income (loss) attributable to Common stock, Diluted	$	49,013		$	(18,704	)	$	17,033		$	(33,783	)

Denominator for basic and dilutive earnings per share
Weighted average common shares outstanding - Basic	44,180			42,691			44,114			42,322
Effect of assumed shares under treasury stock method for stock options and restricted shares	1,323			—			1,170			—
Weighted average common shares outstanding - Diluted	45,503			42,691			45,284			42,322

Net income (loss) attributable to Participating security holders - Basic	$	1.11		$	(0.44	)	$	0.39		$	(0.80	)
Net income (loss) attributable to Participating security holders - Diluted	$	1.08		$	(0.44	)	$	0.38		$	(0.80	)

Subsequent Events

6 Months Ended

Jun. 30, 2018

Subsequent Events [Abstract]

Subsequent Events

22. Subsequent Events

Subsequent to June 30, 2018, the Broadcasting segment entered into multiple asset purchase agreements ("APAs"), for consideration of up to $19.8 million, of which $7.3 million are subject to FCC approval and / or closing conditions as of the filing date. The Broadcasting segment closed on multiple APAs for a total consideration of $24.3 million, of which $12.5 million was related to APAs entered into subsequent to June 30, 2018.

On July 23, 2018, in connection with the signed agreement to purchase the long-term care block of Humana, which is subject to regulatory approval as of the date of this filing, CGI obtained a three month surplus note (the "Surplus Note") from Humana, issued July 17, 2018 and due September 14, 2018, in the amount of $32.0 million. At the same time, and as a further inducement to Humana to purchase the Surplus Note, the Company entered into a Note Purchase Agreement with Humana pursuant to which the Company agreed to purchase the Surplus Note from Humana in the event CGI fails to pay all amounts thereunder when due.

On July 24, 2018, the DBMG Facility was amended, increasing the availability of the borrowing base allowing DBMG to borrow an additional $10.0 million of the $70.0 million total line and bearing interest at LIBOR plus 2.5%. The temporary borrowing base increase and related interest expire October 23, 2018.

On August 6, 2018, in connection with a private placement at Inseego Corp., an equity method investment of the Company, Philip Falcone stepped down as Chairman of the Board of Directors of Inseego.

On August 7, 2018, certain subsidiaries of the Broadcasting segment entered into several financing transactions, generating approximately $38.1 million of proceeds, which will be used for pending and potential acquisitions, to replenish amounts previously expended on recent acquisitions of broadcasting assets, general corporate purposes, and to pay related fees and expenses. Those financing transactions consisted of the following:


•	HC2 Station Group, Inc., (“HC2 Station"), HC2 LPTV (together with HC2 Station, the “Borrowers”), indirect wholly-owned subsidiaries of the Broadcasting segment, issued a $35.0 million 364-day Secured Note (the “Secured Note”) to certain institutional investors (the "Institutional Investors"). The Secured Note bears interest at a rate of 8.50%, payable at maturity.


•	The Institutional Investors purchased 2.0% of the outstanding common stock of HC2 Broadcasting (the “Equity Purchase”) for an aggregate purchase price of approximately $3.1 million.

•

HC2 Broadcasting also issued a warrant (the “Warrant”) to the Institutional Investors to purchase an additional 2.0% of the common stock of HC2 Broadcasting outstanding immediately after consummation of the Equity Purchase for what would be an aggregate purchase price of approximately $3.7 million if exercised as of the issuance date, and as may be adjusted at any future exercise of the Warrant pursuant to its terms. The Warrant has a five-year term and is immediately exercisable.

The issuance and sale of the Secured Note, the Equity Purchase and the issuance of the Warrant are collectively referred to as the “HC2 Broadcasting Transactions”. The Equity Purchase and the issuance of the Warrant were, and the issuance of shares of HC2 Broadcasting common stock pursuant to the Warrant will be, issued in a private placement exempt from registration requirements pursuant to Section 4(2) of the Securities Act.

Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Use of Estimates and Assumptions

Accounting Pronouncements Adopted in the Current Year and New Accounting Pronouncements

Accounting Pronouncements Adopted in the Current Year

Effective January 1, 2018 the Company adopted the accounting pronouncements described below.

Statement of Cash Flows



	June 30, 2018		June 30, 2017
Cash and cash equivalents, beginning of period	$	97,885	$	115,371
Restricted cash included in other assets	968		498
Total cash and cash equivalents and restricted cash	$	98,853	$	115,869

Cash and cash equivalents, end of period	$	112,304	$	143,130
Restricted cash included in other assets	4,551		495
Total cash and cash equivalents and restricted cash	$	116,855	$	143,625

Recognition and Measurement of Financial Assets and Financial Liabilities



Equity securities which were previously classified as available-for-sale	$	1,660
Equity securities which were previously accounted for under the cost method	1,635
Total	$	3,295

See Note 5. Investments and Note 6. Fair Value of Financial Instruments for further details.

Revenue Recognition

New Accounting Pronouncements

Reporting Comprehensive Income

Accounting for Leases

Subsequent Events

Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Restrictions on Cash and Cash Equivalents



	June 30, 2018		June 30, 2017
Cash and cash equivalents, beginning of period	$	97,885	$	115,371
Restricted cash included in other assets	968		498
Total cash and cash equivalents and restricted cash	$	98,853	$	115,869

Cash and cash equivalents, end of period	$	112,304	$	143,130
Restricted cash included in other assets	4,551		495
Total cash and cash equivalents and restricted cash	$	116,855	$	143,625

Schedule of Cash and Cash Equivalents



	June 30, 2018		June 30, 2017
Cash and cash equivalents, beginning of period	$	97,885	$	115,371
Restricted cash included in other assets	968		498
Total cash and cash equivalents and restricted cash	$	98,853	$	115,869

Cash and cash equivalents, end of period	$	112,304	$	143,130
Restricted cash included in other assets	4,551		495
Total cash and cash equivalents and restricted cash	$	116,855	$	143,625

Schedule of New Accounting Pronouncements and Changes in Accounting Principles

This standard was adopted prospectively as of January 1, 2018 and resulted in a $3.3 million cumulative effect adjustment credit to retained earnings related to the following investments:



Equity securities which were previously classified as available-for-sale	$	1,660
Equity securities which were previously accounted for under the cost method	1,635
Total	$	3,295

Revenue (Tables)

6 Months Ended

Jun. 30, 2018

Revenue from Contract with Customer [Abstract]

Reconciliation of Revenue from Segments to Consolidated

Revenue from contracts with customers consist of the following (in thousands):



	Three Months Ended June 30, 2018		Six Months Ended June 30, 2018
Revenue⁽¹⁾
Construction	$	176,910	$	335,851
Marine Services	68,376		105,098
Energy	7,078		11,580
Telecommunications	190,529		392,832
Broadcasting	11,089		21,745
Other	1,056		3,409
Total revenue	$	455,038	$	870,515

⁽¹⁾ The Insurance segment does not have revenues in scope of ASU 2014-09.

Schedule of Accounts Receivable

Accounts receivables, net from contracts with customers consist of the following (in thousands):



	June 30, 2018
Accounts receivables with customers
Construction	$	194,381
Marine Services	51,716
Energy	3,278
Telecommunications	80,223
Broadcasting	9,462
Other	3,988
Total accounts receivables with customers	$	343,048

Accounts receivable, net consist of the following (in thousands):



	June 30, 2018			December 31, 2017
Contracts in progress	$	189,056		$	167,809
Trade receivables	94,559			106,937
Unbilled retentions	64,043			50,957
Other receivables	3,654			476
Allowance for doubtful accounts	(4,610		)	(3,733		)
Total accounts receivable, net	$	346,702		$	322,446

Disaggregation of Revenue

The following table disaggregates DBMG's revenue by market (in thousands):



	Three Months Ended June 30, 2018		Six Months Ended June 30, 2018
Commercial	$	67,790	$	137,441
Convention	22,177		53,828
Healthcare	29,245		57,086
Other	57,692		87,472
Total revenue from contracts with customers	176,904		335,827
Other revenue	6		24
Total Construction segment revenue	$	176,910	$	335,851

The following table disaggregates GMSL's revenue by market (in thousands):



	Three Months Ended June 30, 2018		Six Months Ended June 30, 2018
Telecommunication - Maintenance	$	22,090	$	43,872
Telecommunication - Installation	16,498		23,796
Power - Operations, Maintenance & Construction Support	11,923		16,585
Power - Cable Installation & Repair	17,865		20,845
Total revenue from contracts with customers	68,376		105,098
Other revenue	—		—
Total Marine Services segment revenue	$	68,376	$	105,098

ICS's revenues is predominantly derived from wholesale of international long distance minutes (in thousands):



	Three Months Ended June 30, 2018		Six Months Ended June 30, 2018
Termination of long distance minutes	$	190,529	$	392,832
Total revenue from contracts with customers	190,529		392,832
Other revenue	—		—
Total Telecommunications segment revenue	$	190,529	$	392,832

The following table disaggregates the Broadcasting segment's revenue by type (in thousands):



	Three Months Ended June 30, 2018		Six Months Ended June 30, 2018
Advertising	$	7,016	$	13,764
LMA	2,796		5,489
Retransmission	907		1,850
Other	370		642
Total revenue from contracts with customers	11,089		21,745
Other revenue	—		—
Total Broadcasting segment revenue	$	11,089	$	21,745

The following table disaggregates ANG's revenue by type (in thousands):



	Three Months Ended June 30, 2018		Six Months Ended June 30, 2018
Volume-related	$	4,059	$	8,123
Maintenance services	19		48
Total revenue from contracts with customers	4,078		8,171
RNG Incentives	367		742
Alternative Fuel Tax Credit	2,576		2,576
Other revenue	57		91
Total Energy segment revenue	$	7,078	$	11,580

The following table disaggregates the Other segment's revenue by type (in thousands):



	Three Months Ended June 30, 2018		Six Months Ended June 30, 2018
Digital	$	650	$	1,905
Disc	139		840
Mobile	267		664
Total revenue from contracts with customers	1,056		3,409
Other revenue	—		—
Total Other segment revenue	$	1,056	$	3,409

Contract with Customer, Asset and Liability

Contract assets and contract liabilities consisted of the following (in thousands):



	June 30, 2018			December 31, 2017
Contract assets	$	32,871		$	25,676
Contract liabilities	$	(46,991	)	$	(29,862	)

Contract assets and contract liabilities consisted of the following (in thousands):



	June 30, 2018			December 31, 2017
Contract assets	$	16,687		$	6,610
Contract liabilities	$	(214	)	$	(3,106	)

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction

The transaction price allocated to remaining unsatisfied performance obligations consisted of the following (in thousands):



	Within one year		Within five years		Total
Commercial	$	161,867	$	—	$	161,867
Convention	138,511		15,000		153,511
Healthcare	66,253		—		66,253
Other	221,770		53,000		274,770
Remaining unsatisfied performance obligations	$	588,401	$	68,000	$	656,401

The transaction price allocated to remaining unsatisfied performance obligations consisted of the following (in thousands):



	Within one year		Within five years		Thereafter		Total
Telecommunication - Maintenance	$	36,567	$	262,025	$	40,836	$	339,428
Telecommunication - Installation	3,804		—		—		3,804
Power - Operations, Maintenance & Construction Support	12,285		10,913		3,734		26,932
Power - Cable Installation & Repair	1,993		—		—		1,993
Remaining unsatisfied performance obligations	$	54,649	$	272,938	$	44,570	$	372,157

Acquisitions and Dispositions (Tables)

6 Months Ended

Jun. 30, 2018

Business Combinations [Abstract]

Schedule of Purchase Price Allocation

During the year ended December 31, 2017, Broadcasting and its subsidiaries completed the following transactions (in thousands):



	DTV		Mako		Azteca		Other		Total
Cash	$	13,467	$	18,192	$	—	$	12,104	$	43,763
Accounts payable	—		—		33,000		—		33,000
Equity	—		4,994		—		—		4,994
Debt obligations	2,405		5,250		—		—		7,655
Fair value of previously held interest	1,780		—		—		—		1,780
Fair value of consideration	$	17,652	$	28,436	$	33,000	$	12,104	$	91,192

The fair value of consideration transferred and its allocation among the identified assets acquired, liabilities assumed, intangibles and residual goodwill are summarized as follows (in thousands):



Purchase price allocation
Accounts receivable	$	473
Property, plant and equipment	12,730
Goodwill	2,290
Intangibles	1,608
Other assets	909
Total assets acquired	18,010
Accounts payable and other current liabilities	(23		)
Other liabilities	(167		)
Total liabilities assumed	(190		)
Total net assets acquired	$	17,820

The following table summarizes the allocation of the purchase price to the fair value of identifiable assets acquired, liabilities assumed, and intangibles (in thousands):



Purchase price allocation
Property, plant and equipment	$	721
Intangibles	12,446
Total assets acquired	13,167
Total liabilities assumed	—
Total net assets acquired	$	13,167

Fair value of consideration transferred and its allocation among the identified assets acquired, liabilities assumed, intangibles, and residual goodwill are summarized as follows (in thousands):



Purchase price allocation
Cash and cash equivalents	$	2,212
Property, plant and equipment	73,320
Goodwill	11,783
Other assets	596
Total assets acquired	87,911
Accounts payable and other current liabilities	(676		)
Total liabilities assumed	(676		)
Total net assets acquired	$	87,235

The following table summarizes the allocation of the purchase price to the fair value of identifiable assets acquired, liabilities assumed, intangibles and residual goodwill (in thousands):



Purchase price allocation
Cash and cash equivalents	$	61
Accounts receivable	9,134
Property, plant and equipment	12,097
Goodwill	21,402
Intangibles	80,378
Other assets	1,290
Total assets acquired	124,362
Accounts payable and other current liabilities	(8,036		)
Deferred tax liability	(6,072		)
Debt obligations ⁽¹⁾	(4,480		)
Other liabilities	(86		)
Total liabilities assumed	(18,674		)
Enterprise value	105,688
Less fair value of noncontrolling interest	14,496
Total net assets acquired	$	91,192

⁽¹⁾Debt obligations includes a $2.0 million note with CGI, which is eliminated on the Condensed Consolidated Balance Sheet.

Acquired Intangible Assets

The following table summarizes acquired intangible assets (in thousands):

Business Acquisition, Pro Forma Information



	Three Months Ended June 30, 2017			Six Months Ended June 30, 2017
Net revenue	$	389,715		$	791,346
Net income (loss) from continuing operations	$	(22,825	)	$	(33,784	)
Net income (loss) attributable to HC2 Holdings, Inc.	$	(18,278	)	$	(33,141	)

Investments (Tables)

6 Months Ended

Jun. 30, 2018

Investments, Debt and Equity Securities [Abstract]

Schedule of Fixed Maturity and Equity Securities Available-for-Sale

The following tables provide information relating to investments in fixed maturity securities (in thousands):



June 30, 2018	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Fixed maturity securities
U.S. Government and government agencies	$	14,708	$	308	$	(205	)	$	14,811
States, municipalities and political subdivisions	362,775		9,644		(1,446		)	370,973
Residential mortgage-backed securities	86,850		4,909		(637		)	91,122
Commercial mortgage-backed securities	39,331		133		(506		)	38,958
Asset-backed securities	147,542		875		(2,022		)	146,395
Corporate and other	575,516		19,738		(8,260		)	586,994
Total fixed maturity securities	$	1,226,722	$	35,607	$	(13,076	)	$	1,249,253



December 31, 2017	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Fixed maturity securities
U.S. Government and government agencies	$	15,283	$	470	$	(31	)	$	15,722
States, municipalities and political subdivisions	377,549		18,953		(1,052		)	395,450
Foreign government	6,331		—		(333		)	5,998
Residential mortgage-backed securities	101,974		4,185		(1,264		)	104,895
Commercial mortgage-backed securities	30,152		269		(16		)	30,405
Asset-backed securities	145,479		2,610		(163		)	147,926
Corporate and other	589,803		51,891		(1,464		)	640,230
Total fixed maturity securities	$	1,266,571	$	78,378	$	(4,323	)	$	1,340,626

Schedule of Maturities of Fixed Maturity Securities Available-for-Sale



	Amortized Cost		Fair Value
Corporate, Municipal, U.S. Government and Other securities
Due in one year or less	$	13,753	$	13,600
Due after one year through five years	129,070		128,942
Due after five years through ten years	165,275		165,518
Due after ten years	644,901		664,718
Subtotal	952,999		972,778
Mortgage-backed securities	126,181		130,080
Asset-backed securities	147,542		146,395
Total	$	1,226,722	$	1,249,253

Schedule of Major Industry Types of Fixed Maturity Holdings

The tables below show the major industry types of the Company’s corporate and other fixed maturity securities (in thousands):



	June 30, 2018						December 31, 2017
	Amortized Cost		Fair Value		% of Total		Amortized Cost		Fair Value		% of Total
Finance, insurance, and real estate	$	215,159	$	215,813	36.8	%	$	191,234	$	203,735	31.8	%
Transportation, communication and other services	158,600		160,973		27.4	%	186,114		201,802		31.5	%
Manufacturing	97,192		101,014		17.2	%	100,942		111,391		17.4	%
Other	104,565		109,194		18.6	%	111,513		123,302		19.3	%
Total	$	575,516	$	586,994	100.0	%	$	589,803	$	640,230	100.0	%

Other than Temporary Impairment, Credit Losses Recognized in Earnings

Any remaining difference between the fair value and amortized cost is recognized in AOCI. The Company recorded the following (in thousands):



	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Net realized and unrealized gains on investments	$	—	$	—	$	—	$	—
Other income (expenses), net	—		2,800		—		6,070
Total Other-Than-Temporary Impairments	$	—	$	2,800	$	—	$	6,070

Schedule of Unrealized Losses for Fixed Maturities and Equity Securities



	June 30, 2018					December 31, 2017
	Unrealized Losses			% of Total		Unrealized Losses			% of Total
Fixed maturity securities
Less than 20%	$	(12,836	)	98.2	%	$	(4,230	)	93.7	%
20% or more for less than six months	(240		)	1.8	%	(174		)	3.9	%
20% or more for six months or greater	—			—	%	(110		)	2.4	%
Total	$	(13,076	)	100.0	%	$	(4,514	)	100.0	%

Schedule of Estimated Fair Value and Gross Unrealized Loss



June 30, 2018	Less than 12 months					12 months of greater					Total
June 30, 2018	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Fixed maturity securities
U.S. Government and government agencies	$	12,548	$	(205	)	$	—	$	—		$	12,548	$	(205	)
States, municipalities and political subdivisions	111,992		(1,081		)	6,978		(365		)	118,970		(1,446		)
Residential mortgage-backed securities	15,268		(552		)	1,459		(85		)	16,727		(637		)
Commercial mortgage-backed securities	35,308		(506		)	—		—			35,308		(506		)
Asset-backed securities	74,271		(1,836		)	3,740		(186		)	78,011		(2,022		)
Corporate and other	183,883		(6,068		)	24,439		(2,192		)	208,322		(8,260		)
Total fixed maturity securities	$	433,270	$	(10,248	)	$	36,616	$	(2,828	)	$	469,886	$	(13,076	)



December 31, 2017	Less than 12 months					12 months of greater					Total
December 31, 2017	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Fixed maturity securities
U.S. Government and government agencies	$	5,044	$	(17	)	$	2,199	$	(14	)	$	7,243	$	(31	)
States, municipalities and political subdivisions	32,939		(834		)	10,757		(218		)	43,696		(1,052		)
Foreign government	—		—			5,999		(333		)	5,999		(333		)
Residential mortgage-backed securities	5,139		(546		)	16,150		(718		)	21,289		(1,264		)
Commercial mortgage-backed securities	5,053		(12		)	1,003		(4		)	6,056		(16		)
Asset-backed securities	19,771		(64		)	3,963		(99		)	23,734		(163		)
Corporate and other	18,478		(824		)	19,433		(640		)	37,911		(1,464		)
Total fixed maturity securities	$	86,424	$	(2,297	)	$	59,504	$	(2,026	)	$	145,928	$	(4,323	)

Schedule of New Accounting Pronouncements and Changes in Accounting Principles



	June 30, 2018		December 31, 2017
Equity securities
Common stocks	$	9,329	$	4,928
Perpetual preferred stocks	70,228		42,572
Total equity securities	$	79,557	$	47,500

Schedule of Other Invested Assets

Carrying values of other invested assets were as follows (in thousands):



	June 30, 2018						December 31, 2017
	Measurement Alternative		Equity Method		Fair Value		Cost Method		Equity Method		Fair Value
Common Equity	$	—	$	1,750	$	—	$	—	$	1,484	$	—
Preferred Equity	1,600		11,794		—		2,484		14,197		—
Derivatives	—		—		280		422		—		260
Joint Ventures	—		70,685		—		—		66,572		—
Total	$	1,600	$	84,229	$	280	$	2,906	$	82,253	$	260

Summarized Information for Equity Method Investments



	2018			2017
Net revenue	$	201,207		$	247,398
Gross profit	$	70,678		$	76,520
Income (loss) from continuing operations	$	10,628		$	(5,903	)
Net income (loss)	$	(2,699	)	$	(19,868	)

Current assets	$	363,745		$	308,876
Noncurrent assets	$	182,730		$	192,156
Current liabilities	$	230,303		$	209,526
Noncurrent liabilities	$	159,917		$	122,891

Net Investment Income

The major sources of net investment income were as follows (in thousands):



	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Fixed maturity securities, available-for-sale at fair value	$	16,242		$	15,550		$	31,887		$	29,475
Equity securities	677			574			1,262			1,249
Mortgage loans	1,648			564			2,853			1,028
Policy loans	280			291			557			589
Other invested assets	524			3			597			7
Gross investment income	19,371			16,982			37,156			32,348
External investment expense	(29		)	(43		)	(90		)	(105		)
Net investment income	$	19,342		$	16,939		$	37,066		$	32,243

Net Realized Gain (Loss) on Investments

The major sources of net realized and unrealized gains and losses on investments were as follows (in thousands):



	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Realized gains on fixed maturity securities	$	2,407		$	2,424		$	3,720		$	3,385
Realized losses on fixed maturity securities	(550		)	(462		)	(1,265		)	(917		)
Realized gains on equity securities	—			110			—			110
Realized losses on equity securities	(26		)	(31		)	(26		)	(31		)
Net unrealized gains (losses) on equity securities	478			—			(191		)	—
Net unrealized gains (losses) on derivative instruments	185			(946		)	705			(671		)
Net realized and unrealized gains (losses)	$	2,494		$	1,095		$	2,943		$	1,876

Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis



				Total realized/unrealized gains (losses) included in
	Balance at March 31, 2018				Net earnings (loss)			Other comp. income (loss)				Purchases and issuances		Sales and settlements				Transfer to Level 3		Transfer out of Level 3			Balance at June 30, 2018
Assets
Fixed maturity securities
States, municipalities and political subdivisions		$	6,427		$	(1	)		$	(8	)	$	—		$	—		$	—	$	(6,009	)	$	409
Residential mortgage-backed securities		7,249			32				282			—			(826		)	5,530		—			12,267
Commercial mortgage-backed securities		17,751			(39		)		(166		)	4,524			(19		)	—		—			22,051
Asset-backed securities		137,888			460				(1,768		)	18,500			(19,402		)	—		(2,934		)	132,744
Corporate and other		37,595			20				(858		)	23,876			(2,528		)	9,187		—			67,292
Total fixed maturity securities		206,910			472				(2,518		)	46,900			(22,775		)	14,717		(8,943		)	234,763
Equity securities
Common stocks		606			(123		)		—			—			—			—		—			483
Perpetual preferred stocks		23,910			455				—			—			—			—		—			24,365
Total equity securities		24,516			332				—			—			—			—		—			24,848
Derivatives		270			10				—			—			—			—		—			280
Total financial assets		$	231,696		$	814			$	(2,518	)	$	46,900		$	(22,775	)	$	14,717	$	(8,943	)	$	259,891



				Total realized/unrealized (gains) losses included in
	Balance at March 31, 2018			Net (earnings) loss			Other comp. (income) loss			Purchases and issuances		Sales and settlements			Transfer to Level 3		Transfer out of Level 3		Balance at June 30, 2018
Liabilities
Warrant liability		$	2,828	$	488			$	—	$	—		$	—	$	—	$	—	$	3,316
Other		1,233		(326		)		—		—			—		—		—		907
Total financial liabilities		$	4,061	$	162			$	—	$	—		$	—	$	—	$	—	$	4,223

Assets and liabilities measured at fair value on a recurring basis are summarized below (in thousands):



June 30, 2018			Fair Value Measurement Using:
June 30, 2018	Total		Level 1		Level 2		Level 3
Assets
Fixed maturity securities
U.S. Government and government agencies	$	14,811	$	4,899	$	9,912	$	—
States, municipalities and political subdivisions	370,973		—		370,564		409
Residential mortgage-backed securities	91,122		—		78,855		12,267
Commercial mortgage-backed securities	38,958		—		16,907		22,051
Asset-backed securities	146,395		—		13,651		132,744
Corporate and other	586,994		2,081		517,621		67,292
Total fixed maturity securities	1,249,253		6,980		1,007,510		234,763
Equity securities
Common stocks	9,329		8,846		—		483
Perpetual preferred stocks	70,228		7,474		38,389		24,365
Total equity securities	79,557		16,320		38,389		24,848
Derivatives	280		—		—		280
Total assets accounted for at fair value	$	1,329,090	$	23,300	$	1,045,899	$	259,891



Liabilities
Warrant liability	$	3,316	$	—	$	—	$	3,316
Other	907		—		—		907
Total liabilities accounted for at fair value	$	4,223	$	—	$	—	$	4,223



December 31, 2017			Fair Value Measurement Using:
December 31, 2017	Total		Level 1		Level 2		Level 3
Assets
Fixed maturity securities
U.S. Government and government agencies	$	15,722	$	5,094	$	10,628	$	—
States, municipalities and political subdivisions	395,450		—		389,439		6,011
Foreign government	5,998		—		5,998		—
Residential mortgage-backed securities	104,895		—		90,283		14,612
Commercial mortgage-backed securities	30,405		—		18,248		12,157
Asset-backed securities	147,926		—		14,184		133,742
Corporate and other	640,230		2,098		611,844		26,288
Total fixed maturity securities	1,340,626		7,192		1,140,624		192,810
Equity securities
Common stocks	4,928		4,771		—		157
Perpetual preferred stocks	42,572		7,665		28,470		6,437
Total equity securities	47,500		12,436		28,470		6,594
Derivatives	260		—		—		260
Total assets accounted for at fair value	$	1,388,386	$	19,628	$	1,169,094	$	199,664



Liabilities
Warrant liability	$	3,826	$	—	$	—	$	3,826
Other	944		—		—		944
Total liabilities accounted for at fair value	$	4,770	$	—	$	—	$	4,770

Schedule of Changes in Balances of Level 3 Financial Assets at Fair Value



				Total realized/unrealized gains (losses) included in
	Balance at March 31, 2018				Net earnings (loss)			Other comp. income (loss)				Purchases and issuances		Sales and settlements				Transfer to Level 3		Transfer out of Level 3			Balance at June 30, 2018
Assets
Fixed maturity securities
States, municipalities and political subdivisions		$	6,427		$	(1	)		$	(8	)	$	—		$	—		$	—	$	(6,009	)	$	409
Residential mortgage-backed securities		7,249			32				282			—			(826		)	5,530		—			12,267
Commercial mortgage-backed securities		17,751			(39		)		(166		)	4,524			(19		)	—		—			22,051
Asset-backed securities		137,888			460				(1,768		)	18,500			(19,402		)	—		(2,934		)	132,744
Corporate and other		37,595			20				(858		)	23,876			(2,528		)	9,187		—			67,292
Total fixed maturity securities		206,910			472				(2,518		)	46,900			(22,775		)	14,717		(8,943		)	234,763
Equity securities
Common stocks		606			(123		)		—			—			—			—		—			483
Perpetual preferred stocks		23,910			455				—			—			—			—		—			24,365
Total equity securities		24,516			332				—			—			—			—		—			24,848
Derivatives		270			10				—			—			—			—		—			280
Total financial assets		$	231,696		$	814			$	(2,518	)	$	46,900		$	(22,775	)	$	14,717	$	(8,943	)	$	259,891



				Total realized/unrealized (gains) losses included in
	Balance at March 31, 2018			Net (earnings) loss			Other comp. (income) loss			Purchases and issuances		Sales and settlements			Transfer to Level 3		Transfer out of Level 3		Balance at June 30, 2018
Liabilities
Warrant liability		$	2,828	$	488			$	—	$	—		$	—	$	—	$	—	$	3,316
Other		1,233		(326		)		—		—			—		—		—		907
Total financial liabilities		$	4,061	$	162			$	—	$	—		$	—	$	—	$	—	$	4,223



				Total realized/unrealized gains (losses) included in
	Balance at December 31, 2017				Net earnings (loss)			Other comp. income (loss)				Purchases and issuances		Sales and settlements				Transfer to Level 3		Transfer out of Level 3			Balance at June 30, 2018
Assets
Fixed maturity securities
States, municipalities and political subdivisions		$	6,011		$	—			$	(132	)	$	121		$	—		$	418	$	(6,009	)	$	409
Residential mortgage-backed securities		14,612			124				619			—			(5,267		)	5,530		(3,351		)	12,267
Commercial mortgage-backed securities		12,157			(79		)		(264		)	10,276			(39		)	—		—			22,051
Asset-backed securities		133,742			1,158				(3,276		)	68,000			(63,946		)	—		(2,934		)	132,744
Corporate and other		26,288			45				(870		)	29,014			(2,895		)	15,710		—			67,292
Total fixed maturity securities		192,810			1,248				(3,923		)	107,411			(72,147		)	21,658		(12,294		)	234,763
Equity securities
Common stocks		157			(123		)		—			—			—			449		—			483
Perpetual preferred stocks		6,437			455				—			14,943			—			2,530		—			24,365
Total equity securities		6,594			332				—			14,943			—			2,979		—			24,848
Derivatives		260			20				—			—			—			—		—			280
Total financial assets		$	199,664		$	1,600			$	(3,923	)	$	122,354		$	(72,147	)	$	24,637	$	(12,294	)	$	259,891



				Total realized/unrealized (gains) losses included in
	Balance at December 31, 2017			Net (earnings) loss			Other comp. (income) loss			Purchases and issuances		Sales and settlements			Transfer to Level 3		Transfer out of Level 3		Balance at June 30, 2018
Liabilities
Warrant liability		$	3,826	$	(510	)		$	—	$	—		$	—	$	—	$	—	$	3,316
Other		944		(37		)		—		—			—		—		—		907
Total financial liabilities		$	4,770	$	(547	)		$	—	$	—		$	—	$	—	$	—	$	4,223



				Total realized/unrealized gains (losses) included in
	Balance at March 31, 2017			Net earnings (loss)			Other comp. income (loss)				Purchases and issuances		Sales and settlements				Transfer to Level 3			Transfer out of Level 3			Balance at June 30, 2017
Assets
Fixed maturity securities
U.S. Government and government agencies		$	15	$	—			$	—		$	—		$	—			$	—	$	(15	)		$	—
States, municipalities and political subdivisions		6,598		(111		)		(840		)	227			—				1,636		—				7,510
Residential mortgage-backed securities		53,737		(148		)		(9		)	3,417			(3,804		)		2,163		(36,871		)		18,485
Commercial mortgage-backed securities		35,973		(119		)		92			—			(2,752		)		—		(29,440		)		3,754
Asset-backed securities		87,160		(23		)		1,990			53,546			(11,341		)		—		(11,734		)		119,598
Corporate and other		26,720		(55		)		(1,769		)	4,933			(4,098		)		1,312		(6,504		)		20,539
Total fixed maturity securities		210,203		(456		)		(536		)	62,123			(21,995		)		5,111		(84,564		)		169,886
Equity securities
Common stocks		3,531		(2,842		)		1,401			—			—				—		—				2,090
Total equity securities		3,531		(2,842		)		1,401			—			—				—		—				2,090
Derivatives		3,694		(1,539		)		—			—			—				—		—				2,155
Total financial assets		$	217,428	$	(4,837	)		$	865		$	62,123		$	(21,995	)		$	5,111	$	(84,564	)		$	174,131



				Total realized/unrealized (gains) losses included in
	Balance at March 31, 2017			Net (earnings) loss			Other comp. (income) loss			Purchases and issuances		Sales and settlements			Transfer to Level 3			Transfer out of Level 3		Balance at June 30, 2017
Liabilities
Warrant liability		$	4,223	$	(132	)		$	—	$	—		$	—		$	—	$	—		$	4,091
Contingent liability		11,642		88				—		—			—			—		—			11,730
Other		675		367				—		—			—			—		—			1,042
Total financial liabilities		$	16,540	$	323			$	—	$	—		$	—		$	—	$	—		$	16,863



				Total realized/unrealized gains (losses) included in
	Balance at December 31, 2016			Net earnings (loss)			Other comp. income (loss)				Purchases and issuances		Sales and settlements				Transfer to Level 3			Transfer out of Level 3			Balance at June 30, 2017
Assets
Fixed maturity securities
U.S. Government and government agencies		$	32	$	—			$	—		$	—		$	(17	)		$	—	$	(15	)		$	—
States, municipalities and political subdivisions		5,690		—				(43		)	227			—				1,636		—				7,510
Residential mortgage-backed securities		55,954		(743		)		879			3,465			(6,362		)		2,163		(36,871		)		18,485
Commercial mortgage-backed securities		43,018		115				75			—			(10,014		)		—		(29,440		)		3,754
Asset-backed securities		73,217		1,051				307			81,271			(24,514		)		—		(11,734		)		119,598
Corporate and other		20,366		(3,322		)		4,872			7,933			(4,118		)		1,312		(6,504		)		20,539
Total fixed maturity securities		198,277		(2,899		)		6,090			92,896			(45,025		)		5,111		(84,564		)		169,886
Equity securities
Common stocks		4,575		(2,842		)		357			—			—				—		—				2,090
Total equity securities		4,575		(2,842		)		357			—			—				—		—				2,090
Derivatives		3,813		(1,658		)		—			—			—				—		—				2,155
Total financial assets		$	206,665	$	(7,399	)		$	6,447		$	92,896		$	(45,025	)		$	5,111	$	(84,564	)		$	174,131



				Total realized/unrealized (gains) losses included in
	Balance at December 31, 2016			Net (earnings) loss		Other comp. (income) loss			Purchases and issuances		Sales and settlements			Transfer to Level 3			Transfer out of Level 3		Balance at June 30, 2017
Liabilities
Warrant liability		$	4,058	$	33		$	—	$	—		$	—		$	—	$	—		$	4,091
Contingent liability		11,411		319			—		—			—			—		—			11,730
Other		816		226			—		—			—			—		—			1,042
Total financial liabilities		$	16,285	$	578		$	—	$	—		$	—		$	—	$	—		$	16,863

Schedule of Financial Instruments Measured at Fair Value on Nonrecurring Basis



June 30, 2018					Fair Value Measurement Using:
June 30, 2018	Carrying Value		Estimated Fair Value		Level 1		Level 2		Level 3
Assets
Mortgage loans	$	69,890	$	69,890	$	—	$	—	$	69,890
Policy loans	17,768		17,768		—		17,768		—
Other invested assets	1,600		1,600		—		—		1,600
Total assets not accounted for at fair value	$	89,258	$	89,258	$	—	$	17,768	$	71,490
Liabilities
Annuity benefits accumulated ⁽¹⁾	$	237,373	$	237,373	$	—	$	—	$	237,373
Debt obligations ⁽²⁾	624,326		631,626		—		631,626		—
Total liabilities not accounted for at fair value	$	861,699	$	868,999	$	—	$	631,626	$	237,373



December 31, 2017					Fair Value Measurement Using:
December 31, 2017	Carrying Value		Estimated Fair Value		Level 1		Level 2		Level 3
Assets
Mortgage loans	$	52,109	$	52,110	$	—	$	—	$	52,110
Policy loans	17,944		17,944		—		17,944		—
Other invested assets	2,906		3,757		—		—		3,757
Total assets not accounted for at fair value	$	72,959	$	73,811	$	—	$	17,944	$	55,867
Liabilities
Annuity benefits accumulated ⁽¹⁾	$	243,156	$	240,361	$	—	$	—	$	240,361
Debt obligations ⁽²⁾	544,211		552,413		—		552,413		—
Total liabilities not accounted for at fair value	$	787,367	$	792,774	$	—	$	552,413	$	240,361

⁽¹⁾Excludes life contingent annuities in the payout phase.

⁽²⁾ Excludes certain lease obligations accounted for under ASC 840, Leases.

Accounts Receivable, net (Tables)

6 Months Ended

Jun. 30, 2018

Receivables [Abstract]

Schedule of Accounts Receivable

Accounts receivables, net from contracts with customers consist of the following (in thousands):



	June 30, 2018
Accounts receivables with customers
Construction	$	194,381
Marine Services	51,716
Energy	3,278
Telecommunications	80,223
Broadcasting	9,462
Other	3,988
Total accounts receivables with customers	$	343,048

Accounts receivable, net consist of the following (in thousands):



	June 30, 2018			December 31, 2017
Contracts in progress	$	189,056		$	167,809
Trade receivables	94,559			106,937
Unbilled retentions	64,043			50,957
Other receivables	3,654			476
Allowance for doubtful accounts	(4,610		)	(3,733		)
Total accounts receivable, net	$	346,702		$	322,446

Recoverable from Reinsurers (Tables)

6 Months Ended

Jun. 30, 2018

Insurance [Abstract]

Ceded Credit Risk

Recoverable from reinsurers consists of the following (in thousands):



		June 30, 2018				December 31, 2017
Reinsurer	A.M. Best Rating	Amount		% of Total		Amount		% of Total
Hannover Life Reassurance Co	A+	$	336,435	63.4	%	$	336,852	64.0	%
Loyal American Life Insurance Co (Cigna)	A-	143,086		26.9	%	140,552		26.7	%
Great American Life Insurance Co	A	51,748		9.7	%	48,933		9.3	%
Total		$	531,269	100.0	%	$	526,337	100.0	%

Property, Plant and Equipment, net (Tables)

6 Months Ended

Jun. 30, 2018

Property, Plant and Equipment [Abstract]

Summary of Property, Plant and Equipment

Property, plant and equipment consists of the following (in thousands):



	June 30, 2018		December 31, 2017
Land	$	30,271	$	30,313
Building and leasehold improvements	37,911		34,632
Plant and transportation equipment	9,301		6,631
Cable-ships and submersibles	250,968		251,840
Equipment, furniture and fixtures, and software	142,223		127,409
Construction in progress	6,370		19,927
	477,044		470,752
Less: Accumulated depreciation	108,130		96,092
Total	$	368,914	$	374,660

Goodwill and Intangibles, net (Tables)

6 Months Ended

Jun. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of the Changes in the Carrying Amount of Goodwill by Reporting Unit

The changes in the carrying amount of goodwill by segment were as follows (in thousands):



	Construction			Marine Services		Energy		Telecom		Insurance		Life Sciences			Broadcasting			Other		Total
Balance at December 31, 2017		$	38,607	$	14,251	$	2,122	$	3,378	$	47,290	$	3,620			$	20,678	$	1,795	$	131,741
Measurement period adjustment		—		—		—		—		—		—				725		—		725
Disposition		—		—		—		—		—		(3,620		)		—		—		(3,620		)
Balance at June 30, 2018		$	38,607	$	14,251	$	2,122	$	3,378	$	47,290	$	—			$	21,403	$	1,795	$	128,846

Schedule of Indefinite-Lived Intangible Assets

Balances of Indefinite-lived Intangible Assets as of June 30, 2018 and December 31, 2017 were as follows (in thousands):



	June 30, 2018		December 31, 2017
State licenses	$	2,450	$	2,450
FCC licenses	88,196		76,490
Developed technology	—		6,392
Total	$	90,646	$	85,332

Schedule of Intangible Assets Subject to Amortization

The gross carrying amount and accumulated amortization of amortizable intangible assets by major intangible asset class is as follows:



	Weighted-Average Original Useful Life	June 30, 2018							December 31, 2017
	Weighted-Average Original Useful Life	Gross Carrying Amount		Accumulated Amortization			Net		Gross Carrying Amount		Accumulated Amortization			Net
Trade names	11 Years	$	13,981	$	(5,166	)	$	8,815	$	13,981	$	(4,527	)	$	9,454
Customer relationships	12 Years	21,657		(5,646		)	16,011		21,657		(4,681		)	16,976
Developed technology	4 Years	3,823		(3,749		)	74		3,823		(3,601		)	222
Other	4 Years	5,378		(644		)	4,734		5,374		(253		)	5,121
Total		$	44,839	$	(15,205	)	$	29,634	$	44,835	$	(13,062	)	$	31,773

Life, Accident and Health Reserves (Tables)

6 Months Ended

Jun. 30, 2018

Insurance [Abstract]

Schedule of Life, Accident and Health Reserves

Life, accident and health reserves consist of the following (in thousands):



	June 30, 2018		December 31, 2017
Long-term care insurance reserves	$	1,487,477	$	1,453,442
Traditional life insurance reserves	98,380		99,951
Other accident and health insurance reserves	142,310		140,568
Total life, accident and health reserves	$	1,728,167	$	1,693,961

The following table sets forth changes in the liability for claims for the portion of our long-term care insurance reserves in scope of the ASU 2015-09 disclosure requirements (in thousands):



	Six Months Ended June 30,
	2018			2017
Beginning balance	$	243,454		$	226,970
Less: recoverable from reinsurers	(100,610		)	(97,858		)
Beginning balance, net	142,844			129,112
Incurred related to insured events of:
Current year	36,396			33,411
Prior years	2,643			(2,880		)
Total incurred	39,039			30,531
Paid related to insured events of:
Current year	(1,360		)	(1,584		)
Prior years	(25,250		)	(20,984		)
Total paid	(26,610		)	(22,568		)
Interest on liability for policy and contract claims	2,678			2,409
Ending balance, net	157,951			139,484
Add: recoverable from reinsurers	106,387			107,673
Ending balance	$	264,338		$	247,157

Accounts Payable and Other Current Liabilities (Tables)

6 Months Ended

Jun. 30, 2018

Payables and Accruals [Abstract]

Schedule of Accounts Payable and Other Current Liabilities

Accounts payable and other current liabilities consist of the following (in thousands):



	June 30, 2018		December 31, 2017
Accounts payable	$	100,200	$	119,236
Accrued expenses and other current liabilities	73,927		99,489
Accrued interconnection costs	75,665		73,383
Accrued payroll and employee benefits	35,778		44,312
Accrued interest	5,220		4,636
Accrued income taxes	5,549		6,436
Total accounts payable and other current liabilities	$	296,339	$	347,492

Debt Obligations (Tables)

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Schedule of Long-term Debt Obligations

Debt obligations consist of the following (in thousands):



	June 30, 2018			December 31, 2017
Corporate
11.0% Senior Secured Notes due in 2019	$	510,000		$	400,000
Construction
LIBOR plus 2.25% Notes, due in 2024⁽¹⁾	5,388			6,738
LIBOR plus 1.5%, due 2023 and 2025	41,697			19,670
Marine Services
Notes payable and revolving lines of credit, various maturity dates	31,406			23,748
Obligations under capital leases	44,025			48,500
Energy
4.5% Note due in 2022	11,900			12,454
5.00% Term Loan due in 2022	13,020			13,706
4.25% Seller Note due in 2022	1,714			2,336
LIBOR plus 3.0% Note	1,000			1,031
Other	869			996
Life Sciences
11.0% Secured Convertible Promissory Note Due in 2018	1,750			1,750
Broadcasting
LIBOR plus applicable margin Bridge Note, due in 2018	—			60,000
Notes payable, various maturity dates	10,006			10,135
Other
Notes payable, various maturity dates	—			54
Total	672,775			601,118
Issuance discount, net and deferred financing costs	(4,270		)	(7,946		)
Debt obligations	$	668,505		$	593,172

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

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+ Details

Employee Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2018

Retirement Benefits [Abstract]

Components of Net Periodic Benefit Cost

The following table presents the components of Net periodic benefit cost for the periods presented (in thousands):



	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Service cost - benefits earning during the period	$	—		$	—		$	—		$	—
Interest cost on projected benefit obligation	1,368			1,385			2,737			2,769
Expected return on assets	(1,935		)	(1,896		)	(3,869		)	(3,792		)
Actuarial gain	—			—			—			—
Foreign currency gain (loss)	(24		)	7			(49		)	14
Net periodic benefit cost (income)	$	(591	)	$	(504	)	$	(1,181	)	$	(1,009	)

Share-based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Fair Value of Each Option Grant Estimated

The fair value of each option grant was estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions shown as a weighted average for the year:



	Six Months Ended June 30,
	2018	2017
Expected option life (in years)	0.88 - 5.84	5.75 - 6.10
Risk-free interest rate	2.24 - 2.85%	1.84 - 2.22%
Expected volatility	47.51 - 47.89%	47.58 - 48.29%
Dividend yield	—%	—%

Summary of Company's Restricted Stock Activity

A summary of HC2’s restricted stock activity is as follows:



	Shares		Weighted Average Grant Date Fair Value
Unvested - December 31, 2017	1,588,406		$	5.36
Granted	2,073,612		$	6.21
Vested	(263,189	)	$	5.53
Forfeited	(162,660	)	$	5.70
Unvested - June 30, 2018	3,236,169		$	5.87

Summary of Company's Stock Option Activity

A summary of HC2’s stock option activity is as follows:



	Shares		Weighted Average Exercise Price
Outstanding - December 31, 2017	6,989,856		$	6.57
Granted	662,769		$	5.45
Exercised	(102,242	)	$	4.92
Forfeited	(60,293	)	$	5.50
Expired	(157,434	)	$	9.00
Outstanding - June 30, 2018	7,332,656		$	6.45

Eligible for exercise	6,049,223		$	6.24

Equity (Tables)

6 Months Ended

Jun. 30, 2018

Equity [Abstract]

Schedule of Stock by Class

The Company’s preferred shares authorized, issued and outstanding consisted of the following:

Summary of Cash, PIK and Special Cash Dividends

2018



Declaration Date	March 31, 2018		June 30, 2018
Holders of Record Date	March 31, 2018		June 30, 2018
Payment Date	April 16, 2018		July 17, 2018
Total Dividend	$	500	$	500

2017



Declaration Date	March 31, 2017		June 30, 2017
Holders of Record Date	March 31, 2017		June 30, 2017
Payment Date	April 17, 2017		July 17, 2017
Total Dividend	$	563	$	500

- Definition

Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding.

+ References

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+ Details

Related Parties (Tables)

6 Months Ended

Jun. 30, 2018

Summary of Balance Outstanding of Related Parties

A summary of transactions with such joint venture partners and balances outstanding are as follows (in thousands):



	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Net revenue	$	3,754	$	4,701	$	7,638	$	12,097
Operating expenses	$	606	$	1,080	$	1,038	$	4,831
Interest expense	$	335	$	349	$	686	$	696
Dividends	$	1,351	$	—	$	2,374	$	632



	June 30, 2018		December 31, 2017
Accounts receivable	$	4,425	$	8,654
Long-term obligations	$	31,542	$	35,289
Accounts payable	$	440	$	1,925

Operating Segment and Related Information (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Schedules of Concentration of Risk, by Risk Factor

The Company's revenue concentrations of 10% and greater are as follows:



		Three Months Ended June 30,		Six Months Ended June 30,
	Segment	2018	2017	2018	2017
Customer A	Telecommunications	11.9%	*	11.3%	*

* Less than 10% revenue concentration

Summary of Company's Geographic and Operating Segments

Summary information with respect to the Company’s geographic and operating segments is as follows (in thousands):



	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Net Revenue by Geographic Region
United States	$	423,020	$	338,404	$	835,413	$	680,509
United Kingdom	65,390		36,033		101,798		70,725
Other	8,369		4,215		13,258		17,986
Total	$	496,779	$	378,652	$	950,469	$	769,220



	Three Months Ended June 30,					Six Months Ended June 30,
	2018			2017		2018			2017
Net revenue
Construction	$	176,910		$	138,906	$	335,851		$	251,628
Marine Services	68,376			36,386		105,098			80,565
Energy	7,078			4,095		11,580			8,382
Telecommunications	190,529			160,584		392,832			352,333
Insurance	43,750			38,269		83,950			74,295
Broadcasting	11,089			—		21,745			—
Other	1,056			412		3,409			2,017
Eliminations ⁽¹⁾	(2,009		)	—		(3,996		)	—
Total net revenue	496,779			378,652		950,469			769,220



Income (loss) from operations
Construction	11,780			7,982			17,873			13,713
Marine Services	2,755			(7,274		)	(4		)	(1,545		)
Energy	1,508			(449		)	861			(623		)
Telecommunications	1,138			2,064			2,132			3,649
Insurance	3,943			2,959			6,949			3,228
Life Sciences	(6,548		)	(3,607		)	(9,796		)	(6,730		)
Broadcasting	(8,351		)	—			(16,065		)	—
Other	(1,239		)	(4,268		)	(1,427		)	(5,781		)
Non-operating Corporate	(8,495		)	(8,602		)	(15,804		)	(16,134		)
Eliminations⁽¹⁾	(2,009		)	—			(3,996		)	—
Total loss from operations	(5,518		)	(11,195		)	(19,277		)	(10,223		)
Interest expense	(17,181		)	(12,073		)	(36,506		)	(26,188		)
Gain on sale of subsidiary	102,141			—			102,141			—
Income from equity investees	10,752			4,003			5,521			11,696
Other income (expenses), net	(968		)	(3,193		)	124			(8,334		)
Income (loss) from continuing operations before income taxes	89,226			(22,458		)	52,003			(33,049		)
Income tax (expense) benefit	(9,462		)	1,985			(11,093		)	(3,306		)
Net income (loss)	79,764			(20,473		)	40,910			(36,355		)
Less: Net (income) loss attributable to noncontrolling interest and redeemable noncontrolling interest	(24,398		)	2,562			(20,540		)	3,948
Net income (loss) attributable to HC2 Holdings, Inc.	55,366			(17,911		)	20,370			(32,407		)
Less: Preferred stock and deemed dividends from conversions	703			793			1,406			1,376
Net income (loss) attributable to common stock and participating preferred stockholders	$	54,663		$	(18,704	)	$	18,964		$	(33,783	)



	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Depreciation and Amortization
Construction	$	1,665		$	1,240		$	3,192		$	2,880
Marine Services	6,429			5,255			13,257			10,340
Energy	1,359			1,381			2,703			2,629
Telecommunications	87			94			173			191
Insurance ⁽²⁾	(1,320		)	(1,063		)	(2,254		)	(2,121		)
Life Sciences	53			41			111			79
Broadcasting	743			—			1,448			—
Other	21			331			42			661
Non-operating Corporate	20			16			41			33
Total	$	9,057		$	7,295		$	18,713		$	14,692

⁽²⁾ Balance includes amortization of negative VOBA, which increases net income.



	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Capital Expenditures ⁽³⁾
Construction	$	2,817	$	3,398	$	4,162	$	7,212
Marine Services	7,549		2,103		14,099		4,732
Energy	388		1,791		1,212		4,441
Telecommunications	7		10		107		40
Insurance	—		105		273		383
Life Sciences	29		147		50		198
Broadcasting	184		—		287		—
Other	8		50		8		13
Non-operating Corporate	8		2		36		—
Total	$	10,990	$	7,606	$	20,234	$	17,019

⁽³⁾The above capital expenditures exclude assets acquired under terms of capital lease and vendor financing obligations.

Segment Reporting for Long-term investments, Property and Equipment - Net and Assets



	June 30,			December 31,
	2018			2017
Investments
Construction	$	165		$	250
Marine Services	70,521			66,322
Insurance	1,455,183			1,493,589
Life Sciences	16,874			17,771
Other	2,433			1,518
Eliminations	(42,599		)	(35,852		)
Total	$	1,502,577		$	1,543,598



	June 30,		December 31,
	2018		2017
Property, Plant and Equipment—Net
United States	$	159,123	$	162,788
United Kingdom	203,787		204,866
Other	6,004		7,006
Total	$	368,914	$	374,660



	June 30,			December 31,
	2018			2017
Total Assets
Construction	$	381,886		$	342,806
Marine Services	399,994			389,500
Energy	80,864			83,607
Telecommunications	102,492			114,445
Insurance	2,085,429			2,117,045
Life Sciences	36,967			31,485
Broadcasting	145,430			136,690
Other	3,742			2,674
Non-operating Corporate	60,131			35,291
Eliminations	(42,599		)	(35,852		)
Total	$	3,254,336		$	3,217,691

Basic and Diluted Income (Loss) Per Common Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Calculation of Basic Income (Loss) Per Common Share to Diluted Income (Loss) Per Common Share

The following table presents a reconciliation of net income (loss) used in basic and diluted EPS calculations (in thousands, except per share amounts):



	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Net income (loss) attributable to common stock and participating preferred stockholders	$	54,663		$	(18,704	)	$	18,964		$	(33,783	)
Earnings allocable to common shares:
Numerator for basic and diluted earnings per share
Participating shares at end of period:
Weighted-average Common stock outstanding	44,180			42,691			44,114			42,322
Unvested Restricted Stock	399			—			317			—
Preferred stock (as-converted basis)	4,787			—			4,787			—
Total	49,366			42,691			49,218			42,322

Percentage of loss allocated to:
Common stock	89.5		%	100.0		%	89.6		%	100.0		%
Unvested Restricted Stock	0.8		%	—		%	0.6		%	—		%
Preferred stock	9.7		%	—		%	9.7		%	—		%

Net Income (loss) attributable to Common stock, Basic	$	48,921		$	(18,704	)	$	16,997		$	(33,783	)

Distributed and Undistributed earnings to Common Shareholders:
Effect of assumed shares under treasury stock method for stock options and restricted shares	$	120		$	—		$	36		$	—
Income from the dilutive impact of subsidiary securities	(28		)	—			—			—
Net Income (loss) attributable to Common stock, Diluted	$	49,013		$	(18,704	)	$	17,033		$	(33,783	)

Denominator for basic and dilutive earnings per share
Weighted average common shares outstanding - Basic	44,180			42,691			44,114			42,322
Effect of assumed shares under treasury stock method for stock options and restricted shares	1,323			—			1,170			—
Weighted average common shares outstanding - Diluted	45,503			42,691			45,284			42,322

Net income (loss) attributable to Participating security holders - Basic	$	1.11		$	(0.44	)	$	0.39		$	(0.80	)
Net income (loss) attributable to Participating security holders - Diluted	$	1.08		$	(0.44	)	$	0.38		$	(0.80	)

Organization and Business (Details)	6 Months Ended
Organization and Business (Details)	Jun. 30, 2018 segment
Business And Organization [Line Items]
Number of reportable segments	8
DBMG
Business And Organization [Line Items]
Parents controlling interest	92.00%
GMSL
Business And Organization [Line Items]
Parents controlling interest	72.00%
ANG
Business And Organization [Line Items]
Parents controlling interest	68.00%
ICS
Business And Organization [Line Items]
Parents controlling interest	100.00%
CGI
Business And Organization [Line Items]
Parents controlling interest	100.00%
Genoval Orthopedics inc.
Business And Organization [Line Items]
Parents controlling interest	80.00%
R2 Dermatology, Inc.
Business And Organization [Line Items]
Parents controlling interest	74.00%
Medibeacon Inc., and Triple Ring Technologies, Inc
Business And Organization [Line Items]
Parents controlling interest	50.00%
DTV America
Business And Organization [Line Items]
Parents controlling interest	50.00%
704Games
Business And Organization [Line Items]
Percentage of ownership	56.00%

Summary of Significant Accounting Policies - Narrative (Details) - Accounting Standards Update 2016-01 - USD ($)
$ in Thousands

Jan. 01, 2018

Dec. 31, 2017

Error Corrections and Prior Period Adjustments Restatement [Line Items]

Cumulative effect adjustment to retained earnings

^[1]

$ 1,635

Retained Earnings (Accumulated Deficit)

Error Corrections and Prior Period Adjustments Restatement [Line Items]

Cumulative effect adjustment to retained earnings

$ 3,295

^[1]

[1]	See Note 2 for further information about adjustments resulting from the Company’s adoption of new accounting standards in 2018.

- Schedule of Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Cash and cash equivalents	$ 112,304	$ 97,885	$ 143,130	$ 115,371
Restricted Cash and Cash Equivalents	4,551	968	495	498
Cash and cash equivalents and restricted cash, beginning of period	$ 116,855	$ 98,853	$ 143,625	$ 115,869

Summary of Significant Accounting Policies - Schedule of New Accounting Pronouncements and Changes in Accounting Principles (Details) - Accounting Standards Update 2016-01 - USD ($)
$ in Thousands

Jan. 01, 2018

Dec. 31, 2017

New Accounting Pronouncements or Change in Accounting Principle [Line Items]

Cumulative effect adjustment to retained earnings

^[1]

$ 1,635

Retained Earnings (Accumulated Deficit)

New Accounting Pronouncements or Change in Accounting Principle [Line Items]

Cumulative effect adjustment to retained earnings

$ 3,295

^[1]

Equity securities which were previously classified as available-for-sale | Retained Earnings (Accumulated Deficit)

New Accounting Pronouncements or Change in Accounting Principle [Line Items]

Cumulative effect adjustment to retained earnings

1,660

Equity securities which were previously accounted for under the cost method | Retained Earnings (Accumulated Deficit)

New Accounting Pronouncements or Change in Accounting Principle [Line Items]

Cumulative effect adjustment to retained earnings

$ 1,635

[1]	See Note 2 for further information about adjustments resulting from the Company’s adoption of new accounting standards in 2018.

Revenue - Narrative (Details) $ in Thousands	3 Months Ended	6 Months Ended
Revenue - Narrative (Details) $ in Thousands	Jun. 30, 2018 USD ($)	Jun. 30, 2018 USD ($) provider	Dec. 31, 2017 USD ($)
Construction
Revenue from External Customer [Line Items]
Change in contract assets costs in excess of billings, new commercial contracts	$ 30,300	$ 30,300
Change in contract assets costs in excess of billings, transfer to receivables	23,100	23,100
Change in contract liabilities costs in excess of billings, new commercial contracts	46,000	46,000
Change in contract liabilities costs in excess of billings, transfer to receivables	28,900	28,900
Contract liabilities	$ 46,991	$ 46,991	$ 29,862
Marine Services
Revenue from External Customer [Line Items]
Percent of revenue recognized	73.00%	72.00%
Contract liabilities	$ 214	$ 214	3,106
Energy
Revenue from External Customer [Line Items]
Revenue after customer rebates tax credits		2,600
Broadcasting
Revenue from External Customer [Line Items]
Contract liabilities	$ 1,300	$ 1,300	$ 1,600
Telecommunication - Maintenance \| Marine Services
Revenue from External Customer [Line Items]
Number of global telecommunications providers \| provider		60
Telecommunication - Maintenance \| Marine Services \| Minimum
Revenue from External Customer [Line Items]
Term of contract		5 years
Telecommunication - Maintenance \| Marine Services \| Maximum
Revenue from External Customer [Line Items]
Term of contract		7 years
Telecommunication - Installation \| Marine Services \| Minimum
Revenue from External Customer [Line Items]
Term of contract		1 month
Telecommunication - Installation \| Marine Services \| Maximum
Revenue from External Customer [Line Items]
Term of contract		5 months

Revenue - Narrative, Performance Obligation (Details) - Broadcasting - Advertising $ in Millions	Jun. 30, 2018 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 3.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	5.3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 8.8

Revenue - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	$ 455,038	$ 340,383	$ 870,515	$ 694,925
Construction
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	176,904		335,827
Marine Services
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	68,376		105,098
Energy
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	4,078		8,171
Telecommunications
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	190,529		392,832
Broadcasting
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	11,089		21,745
Other
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	1,056		3,409
Operating Segments \| Construction
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	176,910		335,851
Operating Segments \| Marine Services
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	68,376		105,098
Operating Segments \| Energy
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	7,078		11,580
Operating Segments \| Telecommunications
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	190,529		392,832
Operating Segments \| Broadcasting
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	11,089		21,745
Operating Segments \| Other
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	$ 1,056		$ 3,409

Revenue - Schedule of Accounts Receivable (Details) $ in Thousands	Jun. 30, 2018 USD ($)
Segment Reporting Information [Line Items]
Total accounts receivables with customers	$ 343,048
Construction
Segment Reporting Information [Line Items]
Total accounts receivables with customers	194,381
Marine Services
Segment Reporting Information [Line Items]
Total accounts receivables with customers	51,716
Energy
Segment Reporting Information [Line Items]
Total accounts receivables with customers	3,278
Telecommunications
Segment Reporting Information [Line Items]
Total accounts receivables with customers	80,223
Broadcasting
Segment Reporting Information [Line Items]
Total accounts receivables with customers	9,462
Other
Segment Reporting Information [Line Items]
Total accounts receivables with customers	$ 3,988

Revenue - Construction Segment Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 455,038	$ 340,383	$ 870,515	$ 694,925
Net revenue	496,779	$ 378,652	950,469	$ 769,220
Construction
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	176,904		335,827
Other revenue	6		24
Net revenue	176,910		335,851
Construction \| Commercial
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	67,790		137,441
Construction \| Convention
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	22,177		53,828
Construction \| Healthcare
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	29,245		57,086
Construction \| Other
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 57,692		$ 87,472

Revenue - Construction Segment Contract with Customer, Asset and Liability (Details) - Construction - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Contract assets	$ 32,871	$ 25,676
Contract liabilities	$ (46,991)	$ (29,862)

Revenue - Schedule of Construction Segment Revenue (Details) - Construction $ in Thousands	Jun. 30, 2018 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 588,401
Remaining performance obligation period	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 68,000
Remaining performance obligation period	60 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 656,401
Commercial \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01
Segment Reporting Information [Line Items]
Remaining performance obligations	161,867
Commercial \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Segment Reporting Information [Line Items]
Remaining performance obligations	0
Commercial \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Segment Reporting Information [Line Items]
Remaining performance obligations	161,867
Convention \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01
Segment Reporting Information [Line Items]
Remaining performance obligations	138,511
Convention \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Segment Reporting Information [Line Items]
Remaining performance obligations	15,000
Convention \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Segment Reporting Information [Line Items]
Remaining performance obligations	153,511
Healthcare \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01
Segment Reporting Information [Line Items]
Remaining performance obligations	66,253
Healthcare \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Segment Reporting Information [Line Items]
Remaining performance obligations	0
Healthcare \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Segment Reporting Information [Line Items]
Remaining performance obligations	66,253
Other \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01
Segment Reporting Information [Line Items]
Remaining performance obligations	221,770
Other \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Segment Reporting Information [Line Items]
Remaining performance obligations	53,000
Other \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 274,770

Revenue - Marine Segment Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	$ 455,038	$ 340,383	$ 870,515	$ 694,925
Net revenue	496,779	$ 378,652	950,469	$ 769,220
Marine Services
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	68,376		105,098
Other revenue	0		0
Net revenue	68,376		105,098
Telecommunication - Maintenance \| Marine Services
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	22,090		43,872
Telecommunication - Installation \| Marine Services
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	16,498		23,796
Power - Operations, Maintenance & Construction Support \| Marine Services
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	11,923		16,585
Power - Cable Installation & Repair \| Marine Services
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	$ 17,865		$ 20,845

Revenue - Marine Segment Contract with Customer, Asset and Liability (Details) - Marine Services - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Contract assets	$ 16,687	$ 6,610
Contract liabilities	$ (214)	$ (3,106)

Revenue - Energy Segment Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	$ 455,038	$ 340,383	$ 870,515	$ 694,925
Net revenue	496,779	$ 378,652	950,469	$ 769,220
Energy
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	4,078		8,171
RNG Incentives	367		742
Alternative Fuel Tax Credit	2,576		2,576
Other revenue	57		91
Net revenue	7,078		11,580
Volume-related \| Energy
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	4,059		8,123
Maintenance services \| Energy
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	$ 19		$ 48

Revenue - Telecommunications Segment Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 455,038	$ 340,383	$ 870,515	$ 694,925
Net revenue	496,779	$ 378,652	950,469	$ 769,220
Telecommunications
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	190,529		392,832
Other revenue	0		0
Net revenue	190,529		392,832
Telecommunications \| Termination of long distance minutes
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 190,529		$ 392,832

Revenue - Broadcasting Segment Remaining Unsatisfied Performance Obligations (Details) - Advertising - Broadcasting $ in Millions	Jun. 30, 2018 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 3.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	5.3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 8.8

Revenue - Broadcasting Segment Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	$ 455,038	$ 340,383	$ 870,515	$ 694,925
Net revenue	496,779	$ 378,652	950,469	$ 769,220
Broadcasting
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	11,089		21,745
Other revenue	0		0
Net revenue	11,089		21,745
Advertising \| Broadcasting
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	7,016		13,764
LMA \| Broadcasting
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	2,796		5,489
Retransmission \| Broadcasting
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	907		1,850
Other \| Broadcasting
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	$ 370		$ 642

Revenue - Other Segment Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	$ 455,038	$ 340,383	$ 870,515	$ 694,925
Net revenue	496,779	$ 378,652	950,469	$ 769,220
Other
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	1,056		3,409
Other revenue	0		0
Net revenue	1,056		3,409
Digital \| Other
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	650		1,905
Disc \| Other
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	139		840
Mobile \| Other
Segment Reporting Information [Line Items]
Total revenue from contracts with customers	$ 267		$ 664

Acquisitions and Dispositions - Construction Segment (Details) - USD ($) $ in Thousands	Nov. 01, 2017	Jun. 30, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Goodwill		$ 128,846	$ 131,741
DBMG
Business Acquisition [Line Items]
Goodwill		$ 2,290
Acquisition costs			3,300
DBMG \| Assembled and Trained Workforce
Business Acquisition [Line Items]
Goodwill			$ 1,500
DBMG \| Candraft
Business Acquisition [Line Items]
Percentage of ownership interest acquired	100.00%
DBMG \| Candraft and MSS
Business Acquisition [Line Items]
Consideration paid	$ 17,800
Cash paid in acquisition	$ 16,100

Acquisitions and Dispositions - Schedule of Purchase Price Allocations (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Purchase price allocation
Goodwill	$ 128,846	$ 131,741
Other
Purchase price allocation
Accounts receivable		9,134
Property, plant and equipment		12,097
Goodwill		21,402
Intangibles		80,378
Other assets		1,290
Cash and cash equivalents		61
Total assets acquired		124,362
Accounts payable and other current liabilities		(8,036)
Deferred tax liability		(6,072)
Other liabilities		(86)
Debt obligations		(4,480)
Total liabilities assumed		(18,674)
Enterprise value		105,688
Less fair value of noncontrolling interest		14,496
Total net assets acquired		91,192
DBMG
Purchase price allocation
Accounts receivable	473
Property, plant and equipment	12,730
Goodwill	2,290
Intangibles	1,608
Other assets	909
Total assets acquired	18,010
Accounts payable and other current liabilities	(23)
Other liabilities	(167)
Total liabilities assumed	(190)
Total net assets acquired	17,820
Marine Services
Purchase price allocation
Property, plant and equipment	73,320
Goodwill	11,783
Other assets	596
Cash and cash equivalents	2,212
Total assets acquired	87,911
Accounts payable and other current liabilities	(676)
Total liabilities assumed	(676)
Total net assets acquired	87,235
Broadcasting
Purchase price allocation
Property, plant and equipment	721
Intangibles	12,446
Cash and cash equivalents		43,763
Total assets acquired	13,167
Debt obligations		(7,655)
Total liabilities assumed	$ 0
Less fair value of noncontrolling interest		1,780
Total net assets acquired		91,192
Broadcasting \| Other
Purchase price allocation
Cash and cash equivalents		12,104
Debt obligations		0
Less fair value of noncontrolling interest		0
Total net assets acquired		12,104
Broadcasting \| CGI
Purchase price allocation
Outstanding debt		$ 2,000

Acquisitions and Dispositions - Marine Services Segment (Details) - Marine Services $ in Millions	Nov. 30, 2017 USD ($) employee assets	Dec. 31, 2017 USD ($)
Subsidiary Of Fugro N.V. (AMS:FUR)
Business Acquisition [Line Items]
Number of assets acquired \| assets	5
Number of employees acquired \| employee	19
Consideration paid	$ 87.2
Short-term loan	$ 7.5
CWind Limited
Business Acquisition [Line Items]
Acquisition costs		$ 1.8
GMH LLC \| Subsidiary Of Fugro N.V. (AMS:FUR)
Business Acquisition [Line Items]
Percentage of ownership	23.60%

Acquisitions and Dispositions - Broadcasting Segment (Details) $ in Thousands		1 Months Ended
	Nov. 30, 2017 USD ($) lptv_stations operating_station television_broadcast_networks city	Feb. 28, 2018 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Other
Business Acquisition [Line Items]
Consideration				$ 124,362
Assets acquired				91,192
Intangibles				80,378
Broadcasting
Business Acquisition [Line Items]
Consideration			$ 13,167
Assets acquired				91,192
Intangibles			$ 12,446
Broadcasting \| DTV
Business Acquisition [Line Items]
Assets acquired	$ 17,700			17,652
Percentage of ownership interest acquired	50.00%
Number of LPTV stations acquired \| lptv_stations	52
Number of cities with LPTV stations \| city	40
Number of television broadcast networks \| television_broadcast_networks	30
Broadcasting \| Mako
Business Acquisition [Line Items]
Assets acquired	$ 28,400			28,436
Number of operating stations acquired \| operating_station	38
Number of cities with operating stations \| city	28
Broadcasting \| Other
Business Acquisition [Line Items]
Assets acquired				$ 12,104
HC2 Network Inc. \| Northstar's Broadcast Television Stations
Business Acquisition [Line Items]
Consideration paid		$ 33,000

Acquisitions and Dispositions - Fair Value Consideration (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Nov. 30, 2017
Other
Business Acquisition [Line Items]
Cash	$ 61
Debt obligations	4,480
Fair value of previously held interest	14,496
Total net assets acquired	91,192
Broadcasting
Business Acquisition [Line Items]
Cash	43,763
Accounts payable	33,000
Equity	4,994
Debt obligations	7,655
Fair value of previously held interest	1,780
Total net assets acquired	91,192
Broadcasting \| DTV
Business Acquisition [Line Items]
Cash	13,467
Accounts payable	0
Equity	0
Debt obligations	2,405
Fair value of previously held interest	1,780
Total net assets acquired	17,652	$ 17,700
Broadcasting \| Mako
Business Acquisition [Line Items]
Cash	18,192
Accounts payable	0
Equity	4,994
Debt obligations	5,250
Fair value of previously held interest	0
Total net assets acquired	28,436	$ 28,400
Broadcasting \| Azteca
Business Acquisition [Line Items]
Cash	0
Accounts payable	33,000
Equity	0
Debt obligations	0
Fair value of previously held interest	0
Total net assets acquired	33,000
Broadcasting \| Other
Business Acquisition [Line Items]
Cash	12,104
Accounts payable	0
Equity	0
Debt obligations	0
Fair value of previously held interest	0
Total net assets acquired	$ 12,104

Acquisitions and Dispositions - Acquired Intangible Assets (Details) - Other $ in Thousands	Dec. 31, 2017 USD ($)
Business Acquisition [Line Items]
Intangibles	$ 80,378
FCC licenses
Business Acquisition [Line Items]
Intangibles	75,852
Trade names
Business Acquisition [Line Items]
Intangibles	208
Other
Business Acquisition [Line Items]
Intangibles	$ 4,318

- Life Sciences Segment (Details) - BeneVir - Life Sciences Segment	Jun. 08, 2018 USD ($)
Business Acquisition [Line Items]
Consideration paid	$ 106,700,000
Payment received	72,800,000
Cash payment to be received upon release of escrow	9,200,000
Payment to be received upon achievement of specified development milestones	512,200,000.0
Pansend
Business Acquisition [Line Items]
Cash payment held in escrow	13,300,000
Gain on sale of business	102,100,000
Payment received	93,400,000
Payments to be received upon achievement of specified levels of annual net sales of licensed products	493,100,000.0
Payment to be received upon achievement of specified development milestones	189,700,000.0
Pansend \| Non-controlling Interest
Business Acquisition [Line Items]
Gain on sale of business	$ 21,700,000
Janssen Biotech, Inc.
Business Acquisition [Line Items]
Percentage of ownership interest acquired	75.90%
Cash paid in acquisition	$ 140,000,000

Acquisitions and Dispositions - Business Acquisition, Pro Forma Information (Details) - Marine Services - Subsidiary Of Fugro N.V. (AMS:FUR) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017
Business Acquisition [Line Items]
Net revenue	$ 389,715	$ 791,346
Net income (loss) from continuing operations	(22,825)	(33,784)
Net income (loss) attributable to HC2 Holdings, Inc.	$ (18,278)	$ (33,141)

Investments - Schedule of Fixed Maturity Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,226,722
Unrealized Losses	(13,076)	$ (4,514)
Fair Value	1,249,253	1,340,626
Fixed maturity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,226,722	1,266,571
Unrealized Gains	35,607	78,378
Unrealized Losses	(13,076)	(4,323)
Fair Value	1,249,253	1,340,626
U.S. Government and government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	14,708	15,283
Unrealized Gains	308	470
Unrealized Losses	(205)	(31)
Fair Value	14,811	15,722
States, municipalities and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	362,775	377,549
Unrealized Gains	9,644	18,953
Unrealized Losses	(1,446)	(1,052)
Fair Value	370,973	395,450
Foreign government
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		6,331
Unrealized Gains		0
Unrealized Losses		(333)
Fair Value		5,998
Residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	86,850	101,974
Unrealized Gains	4,909	4,185
Unrealized Losses	(637)	(1,264)
Fair Value	91,122	104,895
Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	39,331	30,152
Unrealized Gains	133	269
Unrealized Losses	(506)	(16)
Fair Value	38,958	30,405
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	147,542	145,479
Unrealized Gains	875	2,610
Unrealized Losses	(2,022)	(163)
Fair Value	146,395	147,926
Corporate and other
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	575,516	589,803
Unrealized Gains	19,738	51,891
Unrealized Losses	(8,260)	(1,464)
Fair Value	$ 586,994	$ 640,230

Investments - Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended
Investments - Narrative (Details) $ in Millions	Jun. 30, 2018 USD ($) security	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) security	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Number of fixed maturity and equity securities \| security	245		245		126
Percentage of gross unrealized loss	100.00%		100.00%		100.00%
Fixed maturity securities \| Investment grade
Debt Securities, Available-for-sale [Line Items]
Percentage of gross unrealized loss	54.70%		54.70%		7.30%
Percentage of fair value	61.00%		61.00%		10.40%
Not designated as hedging instrument \| Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Investments at fair value	$ 11.6		$ 11.6		$ 12.3
Gain (loss) resulting for changes in fair value of securities	$ 0.2	$ (0.7)	$ 0.7	$ (0.7)

Investments - Schedule of Maturities of Fixed Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Amortized Cost
Amortized Cost	$ 1,226,722
Fair Value
Total	1,249,253	$ 1,340,626
Corporate, Municipal, U.S. Government and Other securities
Amortized Cost
Due in one year or less	13,753
Due after one year through five years	129,070
Due after five years through ten years	165,275
Due after ten years	644,901
Subtotal	952,999
Fair Value
Due in one year or less	13,600
Due after one year through five years	128,942
Due after five years through ten years	165,518
Due after ten years	664,718
Subtotal	972,778
Mortgage-backed securities
Amortized Cost
Amortized cost, without single maturity date	126,181
Fair Value
Fair value, without single maturity date	130,080
Asset-backed securities
Amortized Cost
Amortized cost, without single maturity date	147,542
Amortized Cost	147,542	145,479
Fair Value
Fair value, without single maturity date	146,395
Total	$ 146,395	$ 147,926

Investments - Schedule of Major Industry Types of Fixed Maturity Holdings (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,226,722
Fair Value	1,249,253	$ 1,340,626
Corporate And Other Fixed Maturities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	575,516	589,803
Fair Value	$ 586,994	$ 640,230
Percentage of Total	100.00%	100.00%
Corporate And Other Fixed Maturities \| Finance, insurance, and real estate
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 215,159	$ 191,234
Fair Value	$ 215,813	$ 203,735
Percentage of Total	36.80%	31.80%
Corporate And Other Fixed Maturities \| Transportation, communications, electric, gas and sanitary services
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 158,600	$ 186,114
Fair Value	$ 160,973	$ 201,802
Percentage of Total	27.40%	31.50%
Corporate And Other Fixed Maturities \| Manufacturing
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 97,192	$ 100,942
Fair Value	$ 101,014	$ 111,391
Percentage of Total	17.20%	17.40%
Corporate And Other Fixed Maturities \| Other
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 104,565	$ 111,513
Fair Value	$ 109,194	$ 123,302
Percentage of Total	18.60%	19.30%

Investments - Other than Temporary Impairment, Credit Losses Recognized in Earnings (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Investment [Line Items]
Total Other-Than-Temporary Impairments	$ 0	$ 2,800	$ 0	$ 6,070
Net realized and unrealized gains on investments
Investment [Line Items]
Total Other-Than-Temporary Impairments	0	0	0	0
Other income (expenses), net
Investment [Line Items]
Total Other-Than-Temporary Impairments	$ 0	$ 2,800	$ 0	$ 6,070

Investments - Schedule of Unrealized Losses for Fixed Maturities Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Unrealized Losses
Less than 20%	$ (12,836)	$ (4,230)
20% or more for less than six months	(240)	(174)
20% or more for six months or greater	$ 0	$ (110)
Percentage of Total
Less than 20%	98.20%	93.70%
20% or more for less than six months	1.80%	3.90%
20% or more for six months or greater	0.00%	2.40%
Unrealized Losses	$ (13,076)	$ (4,514)
Total	100.00%	100.00%

Investments - Schedule of Estimated Fair Values and Gross Unrealized Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fixed maturity securities
Less than 12 months
Fair Value	$ 433,270	$ 86,424
Unrealized Losses	(10,248)	(2,297)
12 months of greater
Fair Value	36,616	59,504
Unrealized Losses	(2,828)	(2,026)
Fair Value	469,886	145,928
Unrealized Losses	(13,076)	(4,323)
U.S. Government and government agencies
Less than 12 months
Fair Value	12,548	5,044
Unrealized Losses	(205)	(17)
12 months of greater
Fair Value	0	2,199
Unrealized Losses	0	(14)
Fair Value	12,548	7,243
Unrealized Losses	(205)	(31)
States, municipalities and political subdivisions
Less than 12 months
Fair Value	111,992	32,939
Unrealized Losses	(1,081)	(834)
12 months of greater
Fair Value	6,978	10,757
Unrealized Losses	(365)	(218)
Fair Value	118,970	43,696
Unrealized Losses	(1,446)	(1,052)
Foreign government
Less than 12 months
Fair Value		0
Unrealized Losses		0
12 months of greater
Fair Value		5,999
Unrealized Losses		(333)
Fair Value		5,999
Unrealized Losses		(333)
Residential mortgage-backed securities
Less than 12 months
Fair Value	15,268	5,139
Unrealized Losses	(552)	(546)
12 months of greater
Fair Value	1,459	16,150
Unrealized Losses	(85)	(718)
Fair Value	16,727	21,289
Unrealized Losses	(637)	(1,264)
Commercial mortgage-backed securities
Less than 12 months
Fair Value	35,308	5,053
Unrealized Losses	(506)	(12)
12 months of greater
Fair Value	0	1,003
Unrealized Losses	0	(4)
Fair Value	35,308	6,056
Unrealized Losses	(506)	(16)
Asset-backed securities
Less than 12 months
Fair Value	74,271	19,771
Unrealized Losses	(1,836)	(64)
12 months of greater
Fair Value	3,740	3,963
Unrealized Losses	(186)	(99)
Fair Value	78,011	23,734
Unrealized Losses	(2,022)	(163)
Corporate and other
Less than 12 months
Fair Value	183,883	18,478
Unrealized Losses	(6,068)	(824)
12 months of greater
Fair Value	24,439	19,433
Unrealized Losses	(2,192)	(640)
Fair Value	208,322	37,911
Unrealized Losses	$ (8,260)	$ (1,464)

Investments - Equity Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Equity securities	$ 79,557	$ 47,500
Common stocks
Debt Securities, Available-for-sale [Line Items]
Equity securities	9,329	4,928
Perpetual preferred stocks
Debt Securities, Available-for-sale [Line Items]
Equity securities	$ 70,228	$ 42,572

Investments - Schedule of Other Invested Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Summary of Investment Holdings [Line Items]
Measurement Alternative	$ 1,600
Equity Method	84,229	$ 82,253
Fair Value	280	260
Cost Method		2,906
Common Equity
Summary of Investment Holdings [Line Items]
Measurement Alternative	0
Equity Method	1,750	1,484
Fair Value	0	0
Cost Method		0
Preferred Equity
Summary of Investment Holdings [Line Items]
Measurement Alternative	1,600
Equity Method	11,794	14,197
Fair Value	0	0
Cost Method		2,484
Derivatives
Summary of Investment Holdings [Line Items]
Measurement Alternative	0
Equity Method	0	0
Fair Value	280	260
Cost Method		422
Joint Ventures
Summary of Investment Holdings [Line Items]
Measurement Alternative	0
Equity Method	70,685	66,572
Fair Value	$ 0	0
Cost Method		$ 0

Investments - Summarized Information for Equity Method Investments (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Net revenue	$ 201,207	$ 247,398
Gross profit	70,678	76,520
Income (loss) from continuing operations	10,628	(5,903)
Net income (loss)	(2,699)	(19,868)
Current assets	363,745	308,876
Noncurrent assets	182,730	192,156
Current liabilities	230,303	209,526
Noncurrent liabilities	$ 159,917	$ 122,891

Investments - Net Investment Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Investment [Line Items]
Gross investment income	$ 19,371	$ 16,982	$ 37,156	$ 32,348
External investment expense	(29)	(43)	(90)	(105)
Net investment income	19,342	16,939	37,066	32,243
Fixed maturity securities, available-for-sale at fair value
Investment [Line Items]
Gross investment income	16,242	15,550	31,887	29,475
Equity securities
Investment [Line Items]
Gross investment income	677	574	1,262	1,249
Mortgage loans
Investment [Line Items]
Gross investment income	1,648	564	2,853	1,028
Policy loans
Investment [Line Items]
Gross investment income	280	291	557	589
Other invested assets
Investment [Line Items]
Gross investment income	$ 524	$ 3	$ 597	$ 7

Investments - Net Realized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Realized gains on fixed maturity securities	$ 2,407	$ 2,424	$ 3,720	$ 3,385
Realized losses on fixed maturity securities	(550)	(462)	(1,265)	(917)
Realized gains on equity securities	0	110	0	110
Realized losses on equity securities	(26)	(31)	(26)	(31)
Net unrealized gains (losses) on equity securities	478	0	(191)	0
Net unrealized gains (losses) on derivative instruments	185	(946)	705	(671)
Net realized and unrealized gains (losses)	$ 2,494	$ 1,095	$ 2,943	$ 1,876

Fair Value of Financial Instruments - Measured on Recurring Basis (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Assets
Fixed maturity securities	$ 1,249,253,000		$ 1,249,253,000		$ 1,340,626,000
Equity securities	79,557,000		79,557,000		47,500,000
Liabilities
Transfer into Level 3	14,717,000	$ 5,111,000	24,637,000	$ 5,111,000
Transfer out of level 3	(8,943,000)	(84,564,000)	(12,294,000)	(84,564,000)
Asset-backed securities
Liabilities
Transfer into Level 3	12,300,000		6,600,000
Transfer out of level 3				(79,500,000)
U.S. Government and government agencies
Assets
Fixed maturity securities	14,811,000		14,811,000		15,722,000
States, municipalities and political subdivisions
Assets
Fixed maturity securities	370,973,000		370,973,000		395,450,000
Liabilities
Transfer into Level 3	0
Transfer out of level 3	(6,009,000)
Foreign government
Assets
Fixed maturity securities					5,998,000
Residential mortgage-backed securities
Assets
Fixed maturity securities	91,122,000		91,122,000		104,895,000
Liabilities
Transfer into Level 3	5,530,000
Transfer out of level 3	0
Commercial mortgage-backed securities
Assets
Fixed maturity securities	38,958,000		38,958,000		30,405,000
Liabilities
Transfer into Level 3	0
Transfer out of level 3	0
Asset-backed securities
Assets
Fixed maturity securities	146,395,000		146,395,000		147,926,000
Liabilities
Transfer into Level 3	0
Transfer out of level 3	(2,934,000)
Corporate and other
Assets
Fixed maturity securities	586,994,000		586,994,000		640,230,000
Liabilities
Transfer into Level 3	9,187,000
Transfer out of level 3	0
Common Stock
Assets
Equity securities	9,329,000		9,329,000		4,928,000
Perpetual preferred stocks
Assets
Equity securities	70,228,000		70,228,000		42,572,000
Recurring
Assets
Fixed maturity securities	1,249,253,000		1,249,253,000		1,340,626,000
Equity securities	79,557,000		79,557,000		47,500,000
Derivatives	280,000		280,000		260,000
Total assets	1,329,090,000		1,329,090,000		1,388,386,000
Liabilities
Other	400,000		400,000
Total liabilities	4,223,000		4,223,000		4,770,000
Recurring \| Warrant liability
Liabilities
Warrant liability	3,316,000		3,316,000		3,826,000
Recurring \| Other
Liabilities
Other	907,000		907,000		944,000
Recurring \| Level 1
Assets
Fixed maturity securities	6,980,000		6,980,000		7,192,000
Equity securities	16,320,000		16,320,000		12,436,000
Derivatives	0		0		0
Total assets	23,300,000		23,300,000		19,628,000
Liabilities
Total liabilities	0		0		0
Recurring \| Level 1 \| Warrant liability
Liabilities
Warrant liability	0		0		0
Recurring \| Level 1 \| Other
Liabilities
Other	0		0		0
Recurring \| Level 2
Assets
Fixed maturity securities	1,007,510,000		1,007,510,000		1,140,624,000
Equity securities	38,389,000		38,389,000		28,470,000
Derivatives	0		0		0
Total assets	1,045,899,000		1,045,899,000		1,169,094,000
Liabilities
Total liabilities	0		0		0
Recurring \| Level 2 \| Warrant liability
Liabilities
Warrant liability	0		0		0
Recurring \| Level 2 \| Other
Liabilities
Other	0		0		0
Recurring \| Level 3
Assets
Fixed maturity securities	234,763,000		234,763,000		192,810,000
Equity securities	24,848,000		24,848,000		6,594,000
Derivatives	280,000		280,000		260,000
Total assets	259,891,000		259,891,000		199,664,000
Liabilities
Total liabilities	4,223,000		4,223,000		4,770,000
Recurring \| Level 3 \| Warrant liability
Liabilities
Warrant liability	3,316,000		3,316,000		3,826,000
Recurring \| Level 3 \| Other
Liabilities
Other	907,000		907,000		944,000
Recurring \| U.S. Government and government agencies
Assets
Fixed maturity securities	14,811,000		14,811,000		15,722,000
Recurring \| U.S. Government and government agencies \| Level 1
Assets
Fixed maturity securities	4,899,000		4,899,000		5,094,000
Recurring \| U.S. Government and government agencies \| Level 2
Assets
Fixed maturity securities	9,912,000		9,912,000		10,628,000
Recurring \| U.S. Government and government agencies \| Level 3
Assets
Fixed maturity securities	0		0		0
Recurring \| States, municipalities and political subdivisions
Assets
Fixed maturity securities	370,973,000		370,973,000		395,450,000
Recurring \| States, municipalities and political subdivisions \| Level 1
Assets
Fixed maturity securities	0		0		0
Recurring \| States, municipalities and political subdivisions \| Level 2
Assets
Fixed maturity securities	370,564,000		370,564,000		389,439,000
Recurring \| States, municipalities and political subdivisions \| Level 3
Assets
Fixed maturity securities	409,000		409,000		6,011,000
Recurring \| Foreign government
Assets
Fixed maturity securities					5,998,000
Recurring \| Foreign government \| Level 1
Assets
Fixed maturity securities					0
Recurring \| Foreign government \| Level 2
Assets
Fixed maturity securities					5,998,000
Recurring \| Foreign government \| Level 3
Assets
Fixed maturity securities					0
Recurring \| Residential mortgage-backed securities
Assets
Fixed maturity securities	91,122,000		91,122,000		104,895,000
Recurring \| Residential mortgage-backed securities \| Level 1
Assets
Fixed maturity securities	0		0		0
Recurring \| Residential mortgage-backed securities \| Level 2
Assets
Fixed maturity securities	78,855,000		78,855,000		90,283,000
Recurring \| Residential mortgage-backed securities \| Level 3
Assets
Fixed maturity securities	12,267,000		12,267,000		14,612,000
Recurring \| Commercial mortgage-backed securities
Assets
Fixed maturity securities	38,958,000		38,958,000		30,405,000
Recurring \| Commercial mortgage-backed securities \| Level 1
Assets
Fixed maturity securities	0		0		0
Recurring \| Commercial mortgage-backed securities \| Level 2
Assets
Fixed maturity securities	16,907,000		16,907,000		18,248,000
Recurring \| Commercial mortgage-backed securities \| Level 3
Assets
Fixed maturity securities	22,051,000		22,051,000		12,157,000
Recurring \| Asset-backed securities
Assets
Fixed maturity securities	146,395,000		146,395,000		147,926,000
Recurring \| Asset-backed securities \| Level 1
Assets
Fixed maturity securities	0		0		0
Recurring \| Asset-backed securities \| Level 2
Assets
Fixed maturity securities	13,651,000		13,651,000		14,184,000
Recurring \| Asset-backed securities \| Level 3
Assets
Fixed maturity securities	132,744,000		132,744,000		133,742,000
Recurring \| Corporate and other
Assets
Fixed maturity securities	586,994,000		586,994,000		640,230,000
Recurring \| Corporate and other \| Level 1
Assets
Fixed maturity securities	2,081,000		2,081,000		2,098,000
Recurring \| Corporate and other \| Level 2
Assets
Fixed maturity securities	517,621,000		517,621,000		611,844,000
Recurring \| Corporate and other \| Level 3
Assets
Fixed maturity securities	67,292,000		67,292,000		26,288,000
Recurring \| Common Stock
Assets
Equity securities	9,329,000		9,329,000		4,928,000
Recurring \| Common Stock \| Level 1
Assets
Equity securities	8,846,000		8,846,000		4,771,000
Recurring \| Common Stock \| Level 2
Assets
Equity securities	0		0		0
Recurring \| Common Stock \| Level 3
Assets
Equity securities	483,000		483,000		157,000
Recurring \| Perpetual preferred stocks
Assets
Equity securities	70,228,000		70,228,000		42,572,000
Liabilities
Level 1 into Level 2 transfers	5,100,000	$ 0	5,100,000	$ 0
Recurring \| Perpetual preferred stocks \| Level 1
Assets
Equity securities	7,474,000		7,474,000		7,665,000
Recurring \| Perpetual preferred stocks \| Level 2
Assets
Equity securities	38,389,000		38,389,000		28,470,000
Recurring \| Perpetual preferred stocks \| Level 3
Assets
Equity securities	$ 24,365,000		$ 24,365,000		$ 6,437,000

Fair Value of Financial Instruments - Schedule of Changes in Level 3 Financial Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Changes in balances of Level 3 financial assets
Balance at beginning of period	$ 231,696	$ 217,428	$ 199,664	$ 206,665	$ 206,665
Total realized/unrealized net earnings (loss)	814	(4,837)	1,600	(7,399)
Total realized/unrealized other comp. income (loss)	(2,518)	865	(3,923)	6,447
Purchases and issuances	46,900	62,123	122,354	92,896
Sales and settlements	(22,775)	(21,995)	(72,147)	(45,025)
Transfer into Level 3	14,717	5,111	24,637	5,111
Transfer out of Level 3	(8,943)	(84,564)	(12,294)	(84,564)
Balance at end of period	259,891	174,131	259,891	174,131	199,664
Changes in balances of Level 3 financial liabilities
Balance at beginning of period	4,061	16,540	4,770	16,285	16,285
Total realized/unrealized net earnings (loss)	162	323	(547)	578
Total realized/unrealized other comp. income (loss)	0	0	0	0
Purchases and issuances	0	0	0	0
Sales and settlements	0	0	0	0
Transfer into Level 3	0	0	0	0
Transfer out of Level 3	0	0	0	0
Balance at end of period	4,223	16,863	$ 4,223	16,863	4,770
Assets, Total \| Level 3
Changes in balances of Level 3 financial liabilities
Percent of total assets (less than)			1.00%
Warrant liability
Changes in balances of Level 3 financial liabilities
Balance at beginning of period	2,828	4,223	$ 3,826	4,058	4,058
Total realized/unrealized net earnings (loss)	488	(132)	(510)	33
Total realized/unrealized other comp. income (loss)	0	0	0	0
Purchases and issuances	0	0	0	0
Sales and settlements	0	0	0	0
Transfer into Level 3	0	0	0	0
Transfer out of Level 3	0	0	0	0
Balance at end of period	3,316	4,091	3,316	4,091	3,826
Contingent liability
Changes in balances of Level 3 financial liabilities
Balance at beginning of period		11,642		11,411	11,411
Total realized/unrealized net earnings (loss)		88		319
Total realized/unrealized other comp. income (loss)		0		0
Purchases and issuances		0		0
Sales and settlements		0		0
Transfer into Level 3		0		0
Transfer out of Level 3		0		0
Balance at end of period		11,730		11,730
Other
Changes in balances of Level 3 financial liabilities
Balance at beginning of period	1,233	675	944	816	816
Total realized/unrealized net earnings (loss)	(326)	367	(37)	226
Total realized/unrealized other comp. income (loss)	0	0	0	0
Purchases and issuances	0	0	0	0
Sales and settlements	0	0	0	0
Transfer into Level 3	0	0	0	0
Transfer out of Level 3	0	0	0	0
Balance at end of period	907	1,042	907	1,042	944
Fixed maturity securities
Changes in balances of Level 3 financial assets
Balance at beginning of period	206,910
Total realized/unrealized net earnings (loss)	472
Total realized/unrealized other comp. income (loss)	(2,518)
Purchases and issuances	46,900
Sales and settlements	(22,775)
Transfer into Level 3	14,717
Transfer out of Level 3	(8,943)
Balance at end of period	234,763		234,763
States, municipalities and political subdivisions
Changes in balances of Level 3 financial assets
Balance at beginning of period	6,427
Total realized/unrealized net earnings (loss)	(1)
Total realized/unrealized other comp. income (loss)	(8)
Purchases and issuances	0
Sales and settlements	0
Transfer into Level 3	0
Transfer out of Level 3	(6,009)
Balance at end of period	409		409
Residential mortgage-backed securities
Changes in balances of Level 3 financial assets
Balance at beginning of period	7,249
Total realized/unrealized net earnings (loss)	32
Total realized/unrealized other comp. income (loss)	282
Purchases and issuances	0
Sales and settlements	(826)
Transfer into Level 3	5,530
Transfer out of Level 3	0
Balance at end of period	12,267		12,267
Commercial mortgage-backed securities
Changes in balances of Level 3 financial assets
Balance at beginning of period	17,751
Total realized/unrealized net earnings (loss)	(39)
Total realized/unrealized other comp. income (loss)	(166)
Purchases and issuances	4,524
Sales and settlements	(19)
Transfer into Level 3	0
Transfer out of Level 3	0
Balance at end of period	22,051		22,051
Asset-backed securities
Changes in balances of Level 3 financial assets
Balance at beginning of period	137,888
Total realized/unrealized net earnings (loss)	460
Total realized/unrealized other comp. income (loss)	(1,768)
Purchases and issuances	18,500
Sales and settlements	(19,402)
Transfer into Level 3	0
Transfer out of Level 3	(2,934)
Balance at end of period	132,744		132,744
Corporate and other
Changes in balances of Level 3 financial assets
Balance at beginning of period	37,595
Total realized/unrealized net earnings (loss)	20
Total realized/unrealized other comp. income (loss)	(858)
Purchases and issuances	23,876
Sales and settlements	(2,528)
Transfer into Level 3	9,187
Transfer out of Level 3	0
Balance at end of period	67,292		67,292
Equity securities \| Fixed maturity securities
Changes in balances of Level 3 financial assets
Balance at beginning of period		210,203	192,810	198,277	198,277
Total realized/unrealized net earnings (loss)		(456)	1,248	(2,899)
Total realized/unrealized other comp. income (loss)		(536)	(3,923)	6,090
Purchases and issuances		62,123	107,411	92,896
Sales and settlements		(21,995)	(72,147)	(45,025)
Transfer into Level 3		5,111	21,658	5,111
Transfer out of Level 3		(84,564)	(12,294)	(84,564)
Balance at end of period	234,763	169,886	234,763	169,886	192,810
Equity securities \| U.S. Government and government agencies
Changes in balances of Level 3 financial assets
Balance at beginning of period		15		32	32
Total realized/unrealized net earnings (loss)		0		0
Total realized/unrealized other comp. income (loss)		0		0
Purchases and issuances		0		0
Sales and settlements		0		(17)
Transfer into Level 3		0		0
Transfer out of Level 3		(15)		(15)
Balance at end of period		0		0
Equity securities \| States, municipalities and political subdivisions
Changes in balances of Level 3 financial assets
Balance at beginning of period		6,598	6,011	5,690	5,690
Total realized/unrealized net earnings (loss)		(111)	0	0
Total realized/unrealized other comp. income (loss)		(840)	(132)	(43)
Purchases and issuances		227	121	227
Sales and settlements		0	0	0
Transfer into Level 3		1,636	418	1,636
Transfer out of Level 3		0	(6,009)	0
Balance at end of period	409	7,510	409	7,510	6,011
Equity securities \| Residential mortgage-backed securities
Changes in balances of Level 3 financial assets
Balance at beginning of period		53,737	14,612	55,954	55,954
Total realized/unrealized net earnings (loss)		(148)	124	(743)
Total realized/unrealized other comp. income (loss)		(9)	619	879
Purchases and issuances		3,417	0	3,465
Sales and settlements		(3,804)	(5,267)	(6,362)
Transfer into Level 3		2,163	5,530	2,163
Transfer out of Level 3		(36,871)	(3,351)	(36,871)
Balance at end of period	12,267	18,485	12,267	18,485	14,612
Equity securities \| Commercial mortgage-backed securities
Changes in balances of Level 3 financial assets
Balance at beginning of period		35,973	12,157	43,018	43,018
Total realized/unrealized net earnings (loss)		(119)	(79)	115
Total realized/unrealized other comp. income (loss)		92	(264)	75
Purchases and issuances		0	10,276	0
Sales and settlements		(2,752)	(39)	(10,014)
Transfer into Level 3		0	0	0
Transfer out of Level 3		(29,440)	0	(29,440)
Balance at end of period	22,051	3,754	22,051	3,754	12,157
Equity securities \| Asset-backed securities
Changes in balances of Level 3 financial assets
Balance at beginning of period		87,160	133,742	73,217	73,217
Total realized/unrealized net earnings (loss)		(23)	1,158	1,051
Total realized/unrealized other comp. income (loss)		1,990	(3,276)	307
Purchases and issuances		53,546	68,000	81,271
Sales and settlements		(11,341)	(63,946)	(24,514)
Transfer into Level 3		0	0	0
Transfer out of Level 3		(11,734)	(2,934)	(11,734)
Balance at end of period	132,744	119,598	132,744	119,598	133,742
Equity securities \| Corporate and other
Changes in balances of Level 3 financial assets
Balance at beginning of period		26,720	26,288	20,366	20,366
Total realized/unrealized net earnings (loss)		(55)	45	(3,322)
Total realized/unrealized other comp. income (loss)		(1,769)	(870)	4,872
Purchases and issuances		4,933	29,014	7,933
Sales and settlements		(4,098)	(2,895)	(4,118)
Transfer into Level 3		1,312	15,710	1,312
Transfer out of Level 3		(6,504)	0	(6,504)
Balance at end of period	67,292	20,539	67,292	20,539	26,288
Equity securities \| Equity securities
Changes in balances of Level 3 financial assets
Balance at beginning of period	24,516	3,531	6,594	4,575	4,575
Total realized/unrealized net earnings (loss)	332	(2,842)	332	(2,842)
Total realized/unrealized other comp. income (loss)	0	1,401	0	357
Purchases and issuances	0	0	14,943	0
Sales and settlements	0	0	0	0
Transfer into Level 3	0	0	2,979	0
Transfer out of Level 3	0	0	0	0
Balance at end of period	24,848	2,090	24,848	2,090	6,594
Equity securities \| Common Stock
Changes in balances of Level 3 financial assets
Balance at beginning of period	606	3,531	157	4,575	4,575
Total realized/unrealized net earnings (loss)	(123)	(2,842)	(123)	(2,842)
Total realized/unrealized other comp. income (loss)	0	1,401	0	357
Purchases and issuances	0	0	0	0
Sales and settlements	0	0	0	0
Transfer into Level 3	0	0	449	0
Transfer out of Level 3	0	0	0	0
Balance at end of period	483	2,090	483	2,090	157
Equity securities \| Perpetual preferred stocks
Changes in balances of Level 3 financial assets
Balance at beginning of period	23,910		6,437
Total realized/unrealized net earnings (loss)	455		455
Total realized/unrealized other comp. income (loss)	0		0
Purchases and issuances	0		14,943
Sales and settlements	0		0
Transfer into Level 3	0		2,530
Transfer out of Level 3	0		0
Balance at end of period	24,365		24,365		6,437
Derivatives
Changes in balances of Level 3 financial assets
Balance at beginning of period	270	3,694	260	3,813	3,813
Total realized/unrealized net earnings (loss)	10	(1,539)	20	(1,658)
Total realized/unrealized other comp. income (loss)	0	0	0	0
Purchases and issuances	0	0	0	0
Sales and settlements	0	0	0	0
Transfer into Level 3	0	0	0	0
Transfer out of Level 3	0	0	0	0
Balance at end of period	$ 280	$ 2,155	$ 280	$ 2,155	$ 260

Fair Value of Financial Instruments - Measured on Nonrecurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Assets
Mortgage loans	$ 69,890	$ 52,109
Policy loans	17,768	17,944
Other invested assets	86,109	85,419
Nonrecurring \| Level 1
Assets
Mortgage loans	0	0
Policy loans	0	0
Other invested assets	0	0
Total assets	0	0
Liabilities
Annuity benefits accumulated	0	0
Debt obligations	0	0
Total liabilities	0	0
Nonrecurring \| Level 2
Assets
Mortgage loans	0	0
Policy loans	17,768	17,944
Other invested assets	0	0
Total assets	17,768	17,944
Liabilities
Annuity benefits accumulated	0	0
Debt obligations	631,626	552,413
Total liabilities	631,626	552,413
Nonrecurring \| Level 3
Assets
Mortgage loans	69,890	52,110
Policy loans	0	0
Other invested assets	1,600	3,757
Total assets	71,490	55,867
Liabilities
Annuity benefits accumulated	237,373	240,361
Debt obligations	0	0
Total liabilities	237,373	240,361
Nonrecurring \| Carrying Value
Assets
Mortgage loans	69,890	52,109
Policy loans	17,768	17,944
Other invested assets	1,600	2,906
Total assets	89,258	72,959
Liabilities
Annuity benefits accumulated	237,373	243,156
Debt obligations	624,326	544,211
Total liabilities	861,699	787,367
Nonrecurring \| Estimated Fair Value
Assets
Mortgage loans	69,890	52,110
Policy loans	17,768	17,944
Other invested assets	1,600	3,757
Total assets	89,258	73,811
Liabilities
Annuity benefits accumulated	237,373	240,361
Debt obligations	631,626	552,413
Total liabilities	$ 868,999	$ 792,774

Accounts Receivable, net (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Receivables [Abstract]
Contracts in progress	$ 189,056	$ 167,809
Trade receivables	94,559	106,937
Unbilled retentions	64,043	50,957
Other receivables	3,654	476
Allowance for doubtful accounts	(4,610)	(3,733)
Total accounts receivable, net	$ 346,702	$ 322,446

Recoverable from Reinsurers (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Ceded Credit Risk [Line Items]
Amount	$ 531,269	$ 526,337
Percentage of Total, Reinsurance recoverable \| Reinsurer Concentration Risk
Ceded Credit Risk [Line Items]
Recoverable from reinsurers assets percent	100.00%	100.00%
Hannover Life Reassurance Co \| A
Ceded Credit Risk [Line Items]
Amount	$ 336,435	$ 336,852
Hannover Life Reassurance Co \| A \| Percentage of Total, Reinsurance recoverable \| Reinsurer Concentration Risk
Ceded Credit Risk [Line Items]
Recoverable from reinsurers assets percent	63.40%	64.00%
Loyal American Life Insurance Co (Cigna) \| A-
Ceded Credit Risk [Line Items]
Amount	$ 143,086	$ 140,552
Loyal American Life Insurance Co (Cigna) \| A- \| Percentage of Total, Reinsurance recoverable \| Reinsurer Concentration Risk
Ceded Credit Risk [Line Items]
Recoverable from reinsurers assets percent	26.90%	26.70%
Great American Life Insurance Co \| A
Ceded Credit Risk [Line Items]
Amount	$ 51,748	$ 48,933
Great American Life Insurance Co \| A \| Percentage of Total, Reinsurance recoverable \| Reinsurer Concentration Risk
Ceded Credit Risk [Line Items]
Recoverable from reinsurers assets percent	9.70%	9.30%

Property, Plant and Equipment, net - Summary of Property, Plant and Equipment, net (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 477,044	$ 470,752
Less: Accumulated depreciation	108,130	96,092
Total	368,914	374,660
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	30,271	30,313
Building and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	37,911	34,632
Plant and transportation equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	9,301	6,631
Cable-ships and submersibles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	250,968	251,840
Equipment, furniture and fixtures, and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	142,223	127,409
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 6,370	$ 19,927

Property, Plant and Equipment, net - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 11.1	$ 8.5	$ 22.3	$ 16.8
Depreciation expense with cost of revenue	1.7	$ 1.3	3.3	$ 2.5
Cable-ships and submersibles
Property, Plant and Equipment [Line Items]
Net book value of equipment under capital leases	$ 42.2		$ 42.2		$ 45.3

Goodwill and Intangibles, net - Changes in the Carrying Amount of Goodwill (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 131,741
Measurement period adjustment	725
Disposition	(3,620)
Ending balance	128,846
Construction
Goodwill [Roll Forward]
Beginning balance	38,607
Measurement period adjustment	0
Disposition	0
Ending balance	38,607
Marine Services
Goodwill [Roll Forward]
Beginning balance	14,251
Measurement period adjustment	0
Disposition	0
Ending balance	14,251
Energy
Goodwill [Roll Forward]
Beginning balance	2,122
Measurement period adjustment	0
Disposition	0
Ending balance	2,122
Telecom
Goodwill [Roll Forward]
Beginning balance	3,378
Measurement period adjustment	0
Disposition	0
Ending balance	3,378
Insurance
Goodwill [Roll Forward]
Beginning balance	47,290
Measurement period adjustment	0
Disposition	0
Ending balance	47,290
Life Sciences
Goodwill [Roll Forward]
Beginning balance	3,620
Measurement period adjustment	0
Disposition	(3,620)
Ending balance	0
Broadcasting
Goodwill [Roll Forward]
Beginning balance	20,678
Measurement period adjustment	725
Disposition	0
Ending balance	21,403
Other
Goodwill [Roll Forward]
Beginning balance	1,795
Measurement period adjustment	0
Disposition	0
Ending balance	$ 1,795

Goodwill and Intangibles, net - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Goodwill, disposition			$ (3,620)
Developed technology sold			6,400
Amortization expense	$ 1,100	$ 1,300	2,100	$ 2,700
FCC licenses
Finite-Lived Intangible Assets [Line Items]
License increase			11,700
Increase in licenses through acquisitions			12,400
Measurement period adjustment			600
Impairment of intangible assets			$ 100

Goodwill and Intangibles, net - Indefinite-lived Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Acquired Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 90,646	$ 85,332
State licenses
Acquired Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	2,450	2,450
FCC licenses
Acquired Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	88,196	76,490
Developed technology
Acquired Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 0	$ 6,392

Goodwill and Intangibles, net - Definite Lived Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 44,839	$ 44,835
Accumulated Amortization	(15,205)	(13,062)
Net	$ 29,634	31,773
Trade names
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Original Useful Life	11 years
Gross Carrying Amount	$ 13,981	13,981
Accumulated Amortization	(5,166)	(4,527)
Net	$ 8,815	9,454
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Original Useful Life	12 years
Gross Carrying Amount	$ 21,657	21,657
Accumulated Amortization	(5,646)	(4,681)
Net	$ 16,011	16,976
Developed technology
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Original Useful Life	4 years
Gross Carrying Amount	$ 3,823	3,823
Accumulated Amortization	(3,749)	(3,601)
Net	$ 74	222
Other
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Original Useful Life	4 years
Gross Carrying Amount	$ 5,378	5,374
Accumulated Amortization	(644)	(253)
Net	$ 4,734	$ 5,121

Life, Accident and Health Reserves - By Product Line (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Liability for Claims and Claims Adjustment Expense [Line Items]
Total life, accident and health reserves	$ 1,728,167	$ 1,693,961
Long-term care insurance reserves
Liability for Claims and Claims Adjustment Expense [Line Items]
Total life, accident and health reserves	1,487,477	1,453,442
Traditional life insurance reserves
Liability for Claims and Claims Adjustment Expense [Line Items]
Total life, accident and health reserves	98,380	99,951
Other accident and health insurance reserves
Liability for Claims and Claims Adjustment Expense [Line Items]
Total life, accident and health reserves	$ 142,310	$ 140,568

Life, Accident and Health Reserves - Liability for Claims of Long-Term Care Insurance Reserves (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Beginning balance	$ 1,693,961
Paid related to insured events of:
Ending balance	1,728,167
Other Long Duration Insurance Product Line
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Beginning balance	243,454	$ 226,970
Less: recoverable from reinsurers	(100,610)	(97,858)
Beginning balance, net	157,951	139,484	$ 142,844	$ 129,112
Incurred related to insured events of:
Current year	36,396	33,411
Prior years	2,643	(2,880)
Total incurred	39,039	30,531
Paid related to insured events of:
Current year	(1,360)	(1,584)
Prior years	(25,250)	(20,984)
Total paid	(26,610)	(22,568)
Interest on liability for policy and contract claims	2,678	2,409
Ending balance, net	157,951	139,484
Add: recoverable from reinsurers	106,387	107,673
Ending balance	$ 264,338	$ 247,157

Accounts Payable and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Payables and Accruals [Abstract]
Accounts payable	$ 100,200	$ 119,236
Accrued expenses and other current liabilities	73,927	99,489
Accrued interconnection costs	75,665	73,383
Accrued payroll and employee benefits	35,778	44,312
Accrued interest	5,220	4,636
Accrued income taxes	5,549	6,436
Total accounts payable and other current liabilities	$ 296,339	$ 347,492

Debt Obligations - Schedule of Long-term Debt (Details)			6 Months Ended
Debt Obligations - Schedule of Long-term Debt (Details)	Jul. 24, 2018 USD ($)	Apr. 05, 2018 USD ($)	Jun. 30, 2018 USD ($)	May 07, 2018 USD ($)	Apr. 04, 2018 USD ($)	Apr. 04, 2018 GBP (£)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Debt Instrument [Line Items]
Total			$ 672,775,000					$ 601,118,000
Original issue discount and debt issuance costs on Senior Secured Notes			(4,270,000)					(7,946,000)
Debt obligations			668,505,000					593,172,000
11.0% Senior Secured Notes, due in 2019
Debt Instrument [Line Items]
Long-term debt			$ 510,000,000					400,000,000
Interest rate (as a percent)			11.00%	11.00%
Aggregate principal amount				$ 110,000,000.0
Notes payable and revolving lines of credit, various maturity dates
Debt Instrument [Line Items]
Long-term debt			$ 0					54,000
DBMG \| LIBOR plus 2.25% Notes, due in 2024
Debt Instrument [Line Items]
Long-term debt							$ 2,900,000
DBMG \| LIBOR plus 2.25% Notes, due in 2024 \| Real Estate Term Advance
Debt Instrument [Line Items]
Long-term debt			$ 5,388,000					6,738,000
Basis spread on variable rate (as a percent)			2.50%
GMSL
Debt Instrument [Line Items]
Obligations under capital leases			$ 44,025,000					48,500,000
GMSL \| Notes payable and revolving lines of credit, various maturity dates
Debt Instrument [Line Items]
Long-term debt			31,406,000					23,748,000
ANG
Debt Instrument [Line Items]
Other			869,000					996,000
ANG \| 4.5% Note due in 2022
Debt Instrument [Line Items]
Long-term debt			$ 11,900,000					12,454,000
Interest rate (as a percent)			4.50%
ANG \| 5.04% Term Loan due in 2022
Debt Instrument [Line Items]
Long-term debt			$ 13,020,000					13,706,000
Interest rate (as a percent)			5.00%
ANG \| 4.25% Seller Note, due in 2022
Debt Instrument [Line Items]
Long-term debt			$ 1,714,000					2,336,000
Interest rate (as a percent)			4.25%
ANG \| LIBOR plus 3.0% Pioneer Demand Note \| Line of Credit
Debt Instrument [Line Items]
Long-term debt			$ 1,000,000					1,031,000
Life Sciences \| Convertible Promissory Notes
Debt Instrument [Line Items]
Long-term debt			$ 1,750,000					1,750,000
Interest rate (as a percent)			11.00%
Broadcasting \| Notes payable and revolving lines of credit, various maturity dates
Debt Instrument [Line Items]
Long-term debt			$ 10,006,000					10,135,000
Broadcasting \| Existing Credit Agreement
Debt Instrument [Line Items]
Long-term debt			$ 0					60,000,000
LIBOR \| DBMG \| LIBOR plus 2.25% Notes, due in 2024 \| Real Estate Term Advance
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)			2.25%
LIBOR \| ANG \| LIBOR plus 3.0% Pioneer Demand Note \| Line of Credit
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)			3.00%
Revolving Credit Facility \| DBMG
Debt Instrument [Line Items]
Line of credit outstanding amount		$ 17,000,000	$ 41,697,000					$ 19,670,000
Basis spread on variable rate (as a percent)			2.00%
Line of credit, maximum amount		$ 70,000,000.0	$ 50,000,000.0
Revolving Credit Facility \| DBMG \| Real Estate Term Advance
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		2.25%
Revolving Credit Facility \| GMSL
Debt Instrument [Line Items]
Interest rate (as a percent)					7.49%	7.49%
Line of credit, maximum amount					$ 9,400,000.0	£ 7,200,000.0
Revolving Credit Facility \| LIBOR \| DBMG
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		1.50%	1.50%
Subsequent Event \| Revolving Credit Facility \| DBMG
Debt Instrument [Line Items]
Increase to current borrowing capacity	$ 10,000,000.0
Subsequent Event \| Revolving Credit Facility \| LIBOR \| DBMG
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	2.50%

Debt Obligations - Nonoperating (Details) - 11.0% Senior Secured Notes, due in 2019 - USD ($)	May 07, 2018	Jun. 30, 2018
Line of Credit Facility [Line Items]
Aggregate principal amount	$ 110,000,000.0
Interest rate (as a percent)	11.00%	11.00%
Issue price of principal amount (as a percent)	102.00%
Premium on debt	$ 2,200,000

Debt Obligations - DBMG and Marine Services Credit Facilities (Details)		6 Months Ended
	Apr. 05, 2018 USD ($)	Jun. 30, 2018 USD ($)	Apr. 04, 2018 USD ($)	Apr. 04, 2018 GBP (£)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
DBMG \| LIBOR plus 2.25% Notes, due in 2024
Line of Credit Facility [Line Items]
Outstanding debt					$ 2,900,000
DBMG \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit, maximum amount	$ 70,000,000.0	$ 50,000,000.0
Basis spread on variable rate (as a percent)		2.00%
Line of credit outstanding amount	$ 17,000,000	$ 41,697,000				$ 19,670,000
DBMG \| Revolving Credit Facility \| LIBOR plus 2.25% Notes, due in 2024
Line of Credit Facility [Line Items]
Proceeds from note payable collateralized (up to)		10,000,000
DBMG \| Letter of Credit
Line of Credit Facility [Line Items]
Line of credit, maximum amount		$ 14,500,000.0
Line of credit outstanding amount					0
Outstanding letters of credit					8,800,000
DBMG \| Real Estate Term Advance \| LIBOR plus 2.25% Notes, due in 2024
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)		2.50%
Outstanding debt		$ 5,388,000				$ 6,738,000
DBMG \| Real Estate Term Advance \| Note Payable Collateralized by Real Estate
Line of Credit Facility [Line Items]
Outstanding debt					$ 2,400,000
DBMG \| Real Estate Term Advance \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)	2.25%
DBMG \| Real Estate Term Advance \| Revolving Credit Facility \| Note Payable Collateralized by Real Estate
Line of Credit Facility [Line Items]
Proceeds from note payable collateralized (up to)		$ 15,000,000
GMSL \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit, maximum amount			$ 9,400,000.0	£ 7,200,000.0
Interest rate (as a percent)			7.49%	7.49%
LIBOR \| DBMG \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)	1.50%	1.50%
LIBOR \| DBMG \| Real Estate Term Advance \| LIBOR plus 2.25% Notes, due in 2024
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)		2.25%

Debt Obligations - Broadcasting and Non-operating Corporate (Details) - USD ($)		6 Months Ended
	May 07, 2018	Jun. 30, 2018	Jun. 30, 2017	Feb. 06, 2018	Feb. 04, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Loss on extinguishment of debt		$ (2,537,000)	$ 0
11.0% Senior Secured Notes, due in 2019
Debt Instrument [Line Items]
Aggregate principal amount	$ 110,000,000.0
Outstanding debt		$ 510,000,000				$ 400,000,000
Interest rate (as a percent)	11.00%	11.00%
HC2 Broadcasting Holdings, Inc \| Bridge Loan \| The Bridge Loan
Debt Instrument [Line Items]
Aggregate principal amount	$ 102,000,000.0				$ 75,000,000.0
Loan increase					$ 27,000,000.0
Outstanding debt				$ 42,000,000
Loss on extinguishment of debt	$ (2,500,000)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
Income Taxes (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Income tax (expense) benefit	$ 9,462	$ (1,985)	$ 11,093	$ 3,306
Federal Tax
Operating Loss Carryforwards [Line Items]
NOL carryforward					$ 100,400
Section 382 base limit					77,800
Federal Tax \| Subsidiaries
Operating Loss Carryforwards [Line Items]
NOL carryforward					$ 108,300

Commitments and Contingencies (Details) - USD ($) $ in Thousands	2 Months Ended	3 Months Ended		6 Months Ended
	Oct. 31, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Nov. 06, 2014
Loss Contingencies [Line Items]
Income Tax Expense (Benefit)		$ (9,462)	$ 1,985	$ (11,093)	$ (3,306)
Common stock, shares issued (in shares)		45,121,231		45,121,231		44,570,004
Global Marine Dispute
Loss Contingencies [Line Items]
Damages incurred (in excess of)	$ 38,000
Invoices rejected		$ 17,000		$ 17,000
Loss contingency, damages paid				8,100
Loss contingency accrual		$ 8,900		$ 8,900
Global Marine Dispute \| Liquidated Damages
Loss Contingencies [Line Items]
Damages incurred (in excess of)	$ 1,200
DBMG
Loss Contingencies [Line Items]
Common stock, shares issued (in shares)							721,000

Employee Retirement Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Retirement Benefits [Abstract]
Service cost - benefits earning during the period	$ 0	$ 0	$ 0	$ 0
Interest cost on projected benefit obligation	1,368	1,385	2,737	2,769
Expected return on assets	(1,935)	(1,896)	(3,869)	(3,792)
Actuarial gain	0	0	0	0
Foreign currency gain (loss)	(24)	7	(49)	14
Net periodic benefit cost (income)	$ (591)	$ (504)	$ (1,181)	$ (1,009)

Employee Retirement Plans - Narrative (Details) - USD ($) $ in Millions		6 Months Ended	12 Months Ended
	Mar. 20, 2018	Jun. 30, 2018	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Contribution Plan Disclosure [Line Items]
Contribution made		$ 1.9
Contribution made, fixed contributions		0.8
Contribution made, profit related contributions		1.1
Expected contributions		2.2
Expected contributions, fixed contributions		1.8
Expected contributions, profit related contributions		$ 0.4
GMSL
Defined Contribution Plan Disclosure [Line Items]
Deferred contribution	$ 13.1
Percent of operating profit	10.00%
Years in arrears	2 years
Variable contribution, percent of dividends	50.00%
GMSL \| Scenario, Forecast
Defined Contribution Plan Disclosure [Line Items]
Fixed contributions			$ 3.1	$ 7.2	$ 7.0	$ 6.8	$ 2.6

Share-based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares)			662,769	331,616
Weighted average fair value at date of grant for options granted (in usd per share)			$ 2.91	$ 2.72
Share-based compensation expense	$ 3.7	$ 1.1	$ 4.8	$ 2.6
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	14.9		$ 14.9
Weighted average remaining period			2 years 7 months 10 days
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average remaining period			2 years 2 months 24 days
Intrinsic value of options outstanding	5.3		$ 5.3
Average remaining life of option outstanding			6 years 9 months 7 days
Intrinsic value of exercisable options	5.0		$ 5.0
Average remaining life of exercisable options			6 years 6 months 7 days
Compensation expense	$ 2.3		$ 2.3
Unvested shares expected to vest (in shares)	1,283,433		1,283,433
Weighted average remaining life			7 years 10 months 28 days
Weighted average exercise price (in usd per share)	$ 7.42		$ 7.42
Intrinsic value	$ 0.3		$ 0.3
Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares authorized to issue (in shares)	3,500,000		3,500,000

Share-based Compensation - Fair Value of Each Option Grant Estimated (Details)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	0.00%	0.00%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected option life (in years)	10 months 17 days	5 years 9 months
Risk-free interest rate	2.24%	1.84%
Expected volatility	47.51%	47.58%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected option life (in years)	5 years 6 months 29 days	6 years 1 month 6 days
Risk-free interest rate	2.85%	2.22%
Expected volatility	47.89%	48.29%

Share-based Compensation - Summary of Company's Restricted Stock Activity (Details) - Restricted Stock	6 Months Ended
	Jun. 30, 2018 $ / shares shares
Shares
Unvested at beginning of period (in shares) \| shares	1,588,406
Granted (in shares) \| shares	2,073,612
Vested (in shares) \| shares	(263,189)
Forfeited (in shares) \| shares	(162,660)
Unvested at end of period (in shares) \| shares	3,236,169
Weighted Average Grant Date Fair Value
Unvested at beginning of period (in usd per share) \| $ / shares	$ 5.36
Granted (in usd per share) \| $ / shares	6.21
Vested (in usd per share) \| $ / shares	5.53
Forfeited (in usd per share) \| $ / shares	5.70
Unvested at end of period (in usd per share) \| $ / shares	$ 5.87

Share-based Compensation - Summary of Company's Stock Option Activity (Details) - $ / shares	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Shares
Outstanding at beginning of period (in shares)	6,989,856
Granted (in shares)	662,769	331,616
Exercised (in shares)	(102,242)
Forfeited (in shares)	(60,293)
Expired (in shares)	(157,434)
Outstanding at end of period (in shares)	7,332,656
Eligible for exercise (in shares)	6,049,223
Weighted Average Exercise Price
Outstanding at beginning of period (in usd per share)	$ 6.57
Granted (in usd per share)	5.45
Exercised (in usd per share)	4.92
Forfeited (in usd per share)	5.50
Expired (in usd per share)	9.00
Outstanding at end of period (in usd per share)	6.45
Eligible for exercise (in usd per share)	$ 6.24

Equity - Preferred Stock (Details) - $ / shares	Jun. 30, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Par value (in dollars per share)	$ 0.001	$ 0.001
Shares authorized (in shares)	20,000,000	20,000,000
Series A shares issued and outstanding
Class of Stock [Line Items]
Shares issued (in shares)	12,500	12,500
Shares outstanding (in shares)	12,500	12,500
Series A-2 shares issued and outstanding
Class of Stock [Line Items]
Shares issued (in shares)	14,000	14,000
Shares outstanding (in shares)	14,000	14,000

Equity - Narrative (Details) - USD ($) $ in Millions			6 Months Ended
Equity - Narrative (Details) - USD ($) $ in Millions	May 02, 2017	Aug. 02, 2016	Jun. 30, 2018	Jun. 30, 2017
Common Stock
Class of Warrant or Right [Line Items]
Common stock (in shares)	17,500
Fair value upon issuance	$ 0.1
Common Stock
Class of Warrant or Right [Line Items]
Issuance and sale of common stock (in shares)			470,000	363,000
DG Value Partners, LP and DG Value Partners II Master Funds LP \| Series A shares issued and outstanding
Class of Warrant or Right [Line Items]
Number of shares of preferred stock converted (in shares)	2,308
DG Value Partners, LP and DG Value Partners II Master Funds LP \| Series A-1 Convertible Preferred Stock
Class of Warrant or Right [Line Items]
Number of shares of preferred stock converted (in shares)	1,000
DG Value Partners, LP and DG Value Partners II Master Funds LP \| Common Stock
Class of Warrant or Right [Line Items]
Number of shares of common stock from conversion (in shares)	803,469
Corrib Master Fund, Ltd. \| Series A shares issued and outstanding
Class of Warrant or Right [Line Items]
Number of shares of preferred stock converted (in shares)			6,864
Issuance and sale of common stock (in shares)		1,000
Luxor Capital Partners, LP \| Series A shares issued and outstanding
Class of Warrant or Right [Line Items]
Number of shares of preferred stock converted (in shares)			61,016
Luxor Capital Partners, LP \| Series A-1 shares issued and outstanding
Class of Warrant or Right [Line Items]
Issuance and sale of common stock (in shares)		9,000
Corrib Master Fund, Ltd. and Luxor Capital Partners, LP
Class of Warrant or Right [Line Items]
Percent of accrued value			1.875%
Recurring
Class of Warrant or Right [Line Items]
Additional share consideration valued at			$ 0.4

Equity - Summary of Cash Dividends (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2017
Equity [Abstract]
Total Dividend	$ 500	$ 500	$ 500	$ 563

Related Parties - Narrative (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Jun. 25, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jan. 11, 2018	Dec. 31, 2017	Nov. 30, 2017
GMH
Related Party Transaction [Line Items]
Management fees paid		$ 0.2	$ 0.2	$ 0.3	$ 0.4
Affiliated Entity \| Harbinger Capital Partners
Related Party Transaction [Line Items]
Expenses under service agreement		1.0	$ 0.9	1.9	$ 1.9
GMH \| Subsidiary Of Fugro N.V. (AMS:FUR)
Related Party Transaction [Line Items]
Ownership percent								23.60%
Expenses for services		3.0		4.1
Issuance Of Secured Convertible Notes \| Life Sciences \| Blossom Innovations, LLC \| R2 Dermatology, Inc.
Related Party Transaction [Line Items]
Debt issued to related party		1.5		1.5			$ 1.5
Issuance Of Senior Secured Promissory Notes \| Sellers Of DTV \| HC2 Broadcasting Holdings, Inc
Related Party Transaction [Line Items]
Interest rate (as a percent)							7.00%
Debt issued to related party		$ 2.4		$ 2.4			$ 2.4
Letter of Credit \| Affiliated Entity \| Harbinger Capital Partners
Related Party Transaction [Line Items]
Expenses under service agreement	$ 0.8
Subsidiary Of Fugro N.V. (AMS:FUR) \| Marine Services
Related Party Transaction [Line Items]
Secured loan								$ 7.5
Interest rate (as a percent)		10.00%		10.00%		4.00%
Interest expense on note		$ 0.2		$ 0.4

Related Parties - Summary of Balance Outstanding of Related Parties (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Related Party Transactions [Abstract]
Net revenue	$ 3,754	$ 4,701	$ 7,638	$ 12,097
Operating expenses	606	1,080	1,038	4,831
Interest expense	335	349	686	696
Dividends received	1,351	$ 0	2,374	$ 632
Accounts receivable	4,425		4,425		$ 8,654
Long-term debt	31,542		31,542		35,289
Accounts payable	$ 440		$ 440		$ 1,925

Operating Segment and Related Information - Narrative (Details)	6 Months Ended
	Jun. 30, 2018 segment
Segment Reporting [Abstract]
Number of reportable geographic segments	2
Number of reportable operating segments	8

Operating Segment and Related Information - Schedules of Concentration of Risk (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Customer A \| Telecommunications \| Customer risk \| Sales Revenue
Concentration Risk [Line Items]
Concentration risk (less than 10% 2017)	11.90%	11.30%

Operating Segment and Related Information - Geographic and Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 496,779	$ 378,652	$ 950,469	$ 769,220
Total revenue from contracts with customers	455,038	340,383	870,515	694,925
Income (loss) from operations	(5,518)	(11,195)	(19,277)	(10,223)
Interest expense	(17,181)	(12,073)	(36,506)	(26,188)
Gain on sale of subsidiary	102,141	0	102,141	0
Income from equity investees	10,752	4,003	5,521	11,696
Other income (expenses), net	(968)	(3,193)	124	(8,334)
Income (loss) from continuing operations before income taxes	89,226	(22,458)	52,003	(33,049)
Income tax (expense) benefit	(9,462)	1,985	(11,093)	(3,306)
Net income (loss)	79,764	(20,473)	40,910	(36,355)
Less: Net (income) loss attributable to noncontrolling interest and redeemable noncontrolling interest	(24,398)	2,562	(20,540)	3,948
Net income (loss) attributable to HC2 Holdings, Inc.	55,366	(17,911)	20,370	(32,407)
Less: Preferred stock and deemed dividends from conversions	703	793	1,406	1,376
Net income (loss) attributable to common stock and participating preferred stockholders	54,663	(18,704)	18,964	(33,783)
Depreciation and amortization	9,057	7,295	18,713	14,692
Capital Expenditures	10,990	7,606	20,234	17,019
Construction
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	176,910		335,851
Total revenue from contracts with customers	176,904		335,827
Depreciation and amortization	1,665	1,240	3,192	2,880
Capital Expenditures	2,817	3,398	4,162	7,212
Marine Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	68,376		105,098
Total revenue from contracts with customers	68,376		105,098
Depreciation and amortization	6,429	5,255	13,257	10,340
Capital Expenditures	7,549	2,103	14,099	4,732
Energy
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	7,078		11,580
Total revenue from contracts with customers	4,078		8,171
Depreciation and amortization	1,359	1,381	2,703	2,629
Capital Expenditures	388	1,791	1,212	4,441
Telecommunications
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	190,529		392,832
Total revenue from contracts with customers	190,529		392,832
Depreciation and amortization	87	94	173	191
Capital Expenditures	7	10	107	40
Insurance
Revenues from External Customers and Long-Lived Assets [Line Items]
Depreciation and amortization	(1,320)	(1,063)	(2,254)	(2,121)
Capital Expenditures	0	105	273	383
Life Sciences
Revenues from External Customers and Long-Lived Assets [Line Items]
Depreciation and amortization	53	41	111	79
Capital Expenditures	29	147	50	198
Broadcasting
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	11,089		21,745
Total revenue from contracts with customers	11,089		21,745
Depreciation and amortization	743	0	1,448	0
Capital Expenditures	184	0	287	0
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	1,056		3,409
Total revenue from contracts with customers	1,056		3,409
Depreciation and amortization	21	331	42	661
Capital Expenditures	8	50	8	13
Non-operating Corporate
Revenues from External Customers and Long-Lived Assets [Line Items]
Depreciation and amortization	20	16	41	33
Capital Expenditures	8	2	36	0
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	423,020	338,404	835,413	680,509
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	65,390	36,033	101,798	70,725
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	8,369	4,215	13,258	17,986
Operating Segments \| Construction
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue		138,906		251,628
Total revenue from contracts with customers	176,910		335,851
Income (loss) from operations	11,780	7,982	17,873	13,713
Operating Segments \| Marine Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue		36,386		80,565
Total revenue from contracts with customers	68,376		105,098
Income (loss) from operations	2,755	(7,274)	(4)	(1,545)
Operating Segments \| Energy
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue		4,095		8,382
Total revenue from contracts with customers	7,078		11,580
Income (loss) from operations	1,508	(449)	861	(623)
Operating Segments \| Telecommunications
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue		160,584		352,333
Total revenue from contracts with customers	190,529		392,832
Income (loss) from operations	1,138	2,064	2,132	3,649
Operating Segments \| Insurance
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	43,750	38,269	83,950	74,295
Income (loss) from operations	3,943	2,959	6,949	3,228
Operating Segments \| Life Sciences
Revenues from External Customers and Long-Lived Assets [Line Items]
Income (loss) from operations	(6,548)	(3,607)	(9,796)	(6,730)
Operating Segments \| Broadcasting
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue		0		0
Total revenue from contracts with customers	11,089		21,745
Income (loss) from operations	(8,351)	0	(16,065)	0
Operating Segments \| Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue		412		2,017
Total revenue from contracts with customers	1,056		3,409
Income (loss) from operations	(1,239)	(4,268)	(1,427)	(5,781)
Operating Segments \| Non-operating Corporate
Revenues from External Customers and Long-Lived Assets [Line Items]
Income (loss) from operations	(8,495)	(8,602)	(15,804)	(16,134)
Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	(2,009)	0	(3,996)	0
Income (loss) from operations	$ (2,009)	$ 0	$ (3,996)	$ 0

Operating Segment and Related Information - Long-term investments, Property and Equipment and Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Investments	$ 1,502,577	$ 1,543,598
Property, Plant and Equipment—Net	368,914	374,660
Total Assets	3,254,336	3,217,691
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, Plant and Equipment—Net	159,123	162,788
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, Plant and Equipment—Net	203,787	204,866
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, Plant and Equipment—Net	6,004	7,006
Operating Segments \| Marine Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Investments	70,521	66,322
Total Assets	399,994	389,500
Operating Segments \| Insurance
Revenues from External Customers and Long-Lived Assets [Line Items]
Investments	1,455,183	1,493,589
Total Assets	2,085,429	2,117,045
Operating Segments \| Life Sciences
Revenues from External Customers and Long-Lived Assets [Line Items]
Investments	16,874	17,771
Total Assets	36,967	31,485
Operating Segments \| Construction
Revenues from External Customers and Long-Lived Assets [Line Items]
Investments	165	250
Total Assets	381,886	342,806
Operating Segments \| Energy
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Assets	80,864	83,607
Operating Segments \| Telecommunications
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Assets	102,492	114,445
Operating Segments \| Broadcasting
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Assets	145,430	136,690
Operating Segments \| Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Investments	2,433	1,518
Total Assets	3,742	2,674
Operating Segments \| Non-operating Corporate
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Assets	60,131	35,291
Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Investments	(42,599)	(35,852)
Total Assets	$ (42,599)	$ (35,852)

Basic and Diluted Income (Loss) Per Common Share - Narrative (Details) - shares	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive common share equivalents (in shares)	0		0
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from computation (in shares)		2,019,972
Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from computation (in shares)		4,787,602

Basic and Diluted Income (Loss) Per Common Share - Computation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Net income (loss) attributable to common stock and participating preferred stockholders	$ 54,663	$ (18,704)	$ 18,964	$ (33,783)
Participating shares at end of period:
Weighted-average Common stock outstanding (in shares)	44,180	42,691	44,114	42,322
Unvested Restricted Stock (in shares)	399	0	317	0
Preferred stock (as-converted basis) (in shares)	4,787	0	4,787	0
Total (in shares)	49,366	42,691	49,218	42,322
Percentage of loss allocated to:
Common stock	89.50%	100.00%	89.60%	100.00%
Unvested Restricted Stock	0.80%	0.00%	0.60%	0.00%
Preferred stock	9.70%	0.00%	9.70%	0.00%
Net Income (loss) attributable to Common stock, Basic	$ 48,921	$ (18,704)	$ 16,997	$ (33,783)
Distributed and Undistributed earnings to Common Shareholders:
Effect of assumed shares under treasury stock method for stock options and restricted shares	120	0	36	0
Income from the dilutive impact of subsidiary securities	(28)	0	0	0
Net Income (loss) attributable to Common stock, Diluted	$ 49,013	$ (18,704)	$ 17,033	$ (33,783)
Denominator for basic and diluted earnings per share
Weighted-average Common stock outstanding (in shares)	44,180	42,691	44,114	42,322
Effect of assumed shares under treasury stock method for stock options and restricted shares (in shares)	1,323	0	1,170	0
Weighted average common shares outstanding - diluted (in shares)	45,503	42,691	45,284	42,322
Net income (loss) attributable to Participating security holders (in usd per share)	$ 1.11	$ (0.44)	$ 0.39	$ (0.80)
Net income (loss) attributable to Participating security holders (in usd per share)	$ 1.08	$ (0.44)	$ 0.38	$ (0.80)

(Details) - USD ($)				1 Months Ended	6 Months Ended
(Details) - USD ($)	Aug. 07, 2018	Jul. 24, 2018	Apr. 05, 2018	Aug. 08, 2018	Jun. 30, 2018	Jun. 30, 2017
Subsequent Event [Line Items]
Consideration transferred, asset purchase agreement					$ 20,234,000	$ 17,019,000
Surplus note received					180,326,000	104,410,000
Proceeds from several financing transactions					(805,000)	$ (116,000)
Revolving Credit Facility \| DBMG
Subsequent Event [Line Items]
Line of credit, maximum amount			$ 70,000,000.0		$ 50,000,000.0
Basis spread on variable rate (as a percent)					2.00%
Revolving Credit Facility \| DBMG \| Subsequent Event
Subsequent Event [Line Items]
Increase to current borrowing capacity		$ 10,000,000.0
Warrants \| HC2 Broadcasting Holdings, Inc \| Subsequent Event
Subsequent Event [Line Items]
Percentage of stock purchased	2.00%
Sale of stock, consideration received on transaction	$ 3,700,000
Warrant term	5 years
LIBOR \| Revolving Credit Facility \| DBMG
Subsequent Event [Line Items]
Basis spread on variable rate (as a percent)			1.50%		1.50%
LIBOR \| Revolving Credit Facility \| DBMG \| Subsequent Event
Subsequent Event [Line Items]
Basis spread on variable rate (as a percent)		2.50%
Broadcasting \| Subsequent Event
Subsequent Event [Line Items]
Consideration transferred, asset purchase agreement				$ 19,800,000.0
Consideration paid				24,300,000
Surplus note received				32,000,000
Proceeds from several financing transactions	$ 38,100,000
Secured Note \| HC2 Station And HC2LPTV \| Subsequent Event
Subsequent Event [Line Items]
Secured note	$ 35,000,000
Interest rate (as a percent)	8.50%
HC2 Broadcasting Holdings, Inc \| Common Stock \| Institutional Investors \| Subsequent Event
Subsequent Event [Line Items]
Percentage of stock purchased	2.00%
Sale of stock, consideration received on transaction	$ 3,100,000
Subject to FCC approval \| Broadcasting \| Subsequent Event
Subsequent Event [Line Items]
Consideration transferred, asset purchase agreement				7,300,000
Asset Purchase Agreement, subsequent to quarter end \| Broadcasting \| Subsequent Event
Subsequent Event [Line Items]
Consideration paid				$ 12,500,000