Income Taxes - Schedule of Components of Income Tax (Benefit) Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal	$ 0	$ 173	$ (23,393)
State	(1,063)	(1,356)	21
Deferred:
Federal	0	(3,529)	22,966
State	0	0	0
Income tax benefit	$ (1,063)	$ (4,712)	$ (406)