Income Taxes - Reconciliation of income tax expense (benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Taxes
Income tax rate (as a percent)	21.00%	21.00%	21.00%
Federal income tax expense	$ 115,210	$ 105,015	$ 93,185
State income tax expense, net of federal benefit	26,520	18,740	20,891
Equity-based compensation	4,597	4,086	1,027
Charitable contributions	2,576
Change in valuation allowance	(2,350)	5	2,582
Other	1,176	441	(191)
Total income tax expense	$ 147,729	$ 128,287	$ 117,494