Income Taxes - Schedule of Components of Income Tax (Benefit) Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ (23,393)	$ 136	$ 29,505
State	21	91	11,440
Deferred:
Federal	22,966	(17,014)	(4,469)
State	0	0	0
Income tax (benefit) expense	$ (406)	$ (16,787)	$ 36,476