Business Combinations - Schedule of Unaudited Consolidated Pro Forma Results of Operations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Business Acquisition [Line Items]
Gain (loss) from sale of discontinued operations		$ 135,045	$ (784)	$ 135,045
Basic income (loss) per common share:
Gain (loss) from sale of discontinued operations		$ 9.66	$ (0.05)	$ 9.69
Diluted income (loss) per common share:
Gain (loss) from sale of discontinued operations		$ 9.35	$ (0.05)	$ 9.69
Schuff [Member]
Business Acquisition [Line Items]
Net revenue	169,184	158,080	317,681	305,000
Net income (loss) from continuing operations	(1,320)	4,317	(3,416)	(516)
Net income (loss) from discontinued operations	4	(567)	12	1,819
Gain (loss) from sale of discontinued operations		135,045	(784)	135,045
Net income (loss) attributable to HC2 Holdings, Inc.	$ (1,316)	$ 138,795	$ (4,188)	$ 136,348
Basic income (loss) per common share:
Income (loss) from continuing operations attributable to HC2 Holdings, Inc.	$ (0.08)	$ 0.31	$ (0.22)	$ (0.04)
Income (loss) from discontinued operations		$ (0.04)		$ 0.13
Gain (loss) from sale of discontinued operations		$ 9.67	$ (0.05)	$ 9.69
Net income (loss) attributable to HC2 Holdings, Inc.	$ (0.08)	$ 9.94	$ (0.27)	$ 9.78
Diluted income (loss) per common share:
Income (loss) from continuing operations attributable to HC2 Holdings, Inc.	$ (0.08)	$ 0.30	$ (0.22)	$ (0.04)
Income (loss) from discontinued operations		$ (0.04)		$ 0.13
Gain (loss) from sale of discontinued operations		$ 9.35	$ (0.05)	$ 9.69
Net income (loss) attributable to HC2 Holdings, Inc.	$ (0.08)	$ 9.61	$ (0.27)	$ 9.78

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component.

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