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Employee Retirement Plans - HC2 Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]    
Defined contribution section employees contribution (as a percent) 50.00%  
Defined benefit, maximum employees contributions percentage 6.00%  
Employee annual salary contributions capped $ 6,000  
Defined benefit, matching contribution amount $ 100,000 $ 100,000