Federal and State Income Taxes - Summary of Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current
Federal									$ 51,180	$ 47,775	$ 34,461
State									22,596	20,728	14,545
Total current income tax expense									73,776	68,503	49,006
Deferred
Federal									(7,151)	(5,396)	(279)
State									(1,944)	(1,467)	(77)
Total deferred income tax benefit expense									(9,095)	(6,863)	(356)
Total income tax expense	$ 9,272	$ 16,976	$ 18,935	$ 19,498	$ 18,950	$ 18,754	$ 14,306	$ 9,630	64,681	61,640	48,650
Tax benefit of operating loss carryforwards									$ 315	$ 315	$ 317