Income Taxes - Components of Income Tax Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current income tax expense (benefit):
Federal	$ 29,310	$ 50,141	$ 13,497
State	6,829	5,116	(619)
Total	36,139	55,257	12,878
Deferred income tax (benefit) expense:
Federal	(6,183)	(1,879)	14,489
State	(2,873)	12,823	11,820
Total	(9,056)	10,944	26,309
Total income tax expense	$ 27,083	$ 66,201	$ 39,187