Income Taxes - Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current
Federal	$ 43,572	$ 9,035	$ 21,059
State	19,155	5,925	9,646
Current income tax expense (benefit)	62,727	14,960	30,705
Deferred
Federal	(4,963)	(3,508)	(5,954)
State	(1,657)	(3,285)	(2,391)
Deferred income tax expense (benefit)	(6,620)	(6,793)	(8,345)
Total provision for income taxes	$ 56,107	$ 8,167	$ 22,360