Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Reconciliation of Income Tax Expense (benefit) (Details)

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Income Taxes - Schedule of Reconciliation of Income Tax Expense (benefit) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]      
Federal
State 19 19
Total current income tax expense 19 19
Deferred Federal (6,880) (32,421) (12,001)
Deferred State 3,008 (3,266)
Total deferred income tax benefit (6,880) (29,413) (15,267)
Total income tax benefit $ (6,880) $ (29,394) $ (15,248)