Income Taxes - Components of the Provision for Income Taxes Consisted of the Following Benefit (Expense) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Current:      
United States $ (975) $ (7,409) $ 1,828
Total current (7,269) (12,780) (2,789)
Deferred:      
United States 25,785 (1,912) (8,439)
Total deferred: 26,132 (1,687) (7,953)
Income tax benefit (expense) (18,863) 14,467 10,742
Tax benefit connection with the reversal of substantially all of valuation allowance on net operating loss carryforwards 35,700    
Bermuda      
Current:      
Foreign 0 0 0
Deferred:      
Foreign 0 0 0
Foreign - Other      
Current:      
Foreign (6,294) (5,371) (4,617)
Deferred:      
Foreign $ 347 $ 225 $ 486