Income Taxes - Schedule of Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ 93,620	$ 85,507	$ 77,694
State	34,123	28,905	25,096
Foreign	325	620	409
Total current provision	128,068	115,032	103,199
Deferred:
Federal	11,655	14,994	8,483
State	4,119	(2,587)	6,519
Foreign	(226)	(24)	6
Total deferred provision	15,548	12,383	15,008
Total tax provision	$ 143,616	$ 127,415	$ 118,207