Income Taxes - Schedule of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current:
Federal	$ 2,180	$ 0	$ 0
State	5,375	4,259	2,058
Total current	7,555	4,259	2,058
Deferred:
Federal	(167,667)	9,815	9,819
State	(10,754)	(2,536)	(4,812)
Total deferred	(178,421)	7,279	5,007
Total income tax (benefit) expense	$ (170,866)	$ 11,538	$ 7,065