Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ 38,843	$ 10,605	$ 13,828
State	12,294	4,080	5,598
Deferred:
Federal	5,016	9,140	11,970
State	1,590	5,757	(606)
Income tax expense	$ 57,743	$ 29,582	$ 30,790