Income Taxes - Reconciliation of Income Tax Expense at Statutory Federal Rate to Actual Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income tax expense
Statutory expense	$ 117,071	$ 120,768	$ 53,581
State income taxes, net of federal benefit	21,001	21,572	9,522
Nondeductible compensation	7,372	4,005	3,545
Meals, entertainment and travel expense	3,336	1,694	2,028
Valuation allowance change	701	(932)	(902)
Adjustment for uncertain tax positions	52	(1,351)	(984)
Other, net	(427)	(827)	(1,221)
Income tax expense	$ 149,106	$ 144,929	$ 65,569
% pre-tax income (loss)
Statutory expense	21.00%	21.00%	21.00%
State income taxes, net of federal benefit	3.80%	3.80%	3.70%
Nondeductible compensation	1.30%	0.70%	1.40%
Meals, entertainment and travel expense	0.60%	0.30%	0.80%
Valuation allowance change	0.10%	(0.20%)	(0.40%)
Adjustment for uncertain tax positions	0.00%	(0.20%)	(0.40%)
Other, net	(0.10%)	(0.20%)	(0.40%)
Income tax expense	26.70%	25.20%	25.70%