Annual report pursuant to Section 13 and 15(d)

Income Taxes - Reconciliation of Income Taxes Computed to Income Tax Expense (Benefit) (Details)

v3.10.0.1
Income Taxes - Reconciliation of Income Taxes Computed to Income Tax Expense (Benefit) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Income tax expense (benefit) at the federal statutory rate $ 52,366 $ 23,490 $ (102,339)
Compensation adjustments 457 664 4,920
State income taxes 560 63 (755)
Debt restructuring cost   18 1,463
Impact of U.S. tax reform 487 105,933  
Gain on exchange of debt   (24,981)  
Valuation allowance (53,980) (118,643) 52,915
Other 645 887 420
Total income tax expense (benefit) $ 535 $ (12,569) $ (43,376)
Income tax expense (benefit) at the federal statutory rate, tax rate 21.00% 35.00% 35.00%
Compensation adjustments, tax rate 0.20% 1.00% (1.70%)
State income taxes, tax rate 0.20% 0.10% 0.20%
Debt restructuring cost, tax rate     (0.50%)
Impact of U.S. tax reform, tax rate 0.20% 157.80%  
Gain on exchange of debt, tax rate   (37.20%)  
Valuation allowance, tax rate (21.70%) (176.80%) (18.10%)
Other, tax rate 0.30% 1.40% (0.10%)
Total income tax expense (benefit), tax rate 0.20% (18.70%) 14.80%