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Income Taxes - Income tax rate reconciliation (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	21.00%	21.00%	21.00%
Non-deductibility of goodwill	0.00%	0.80%	0.00%
Non-deductibility of officer's compensation	1.10%	2.90%	2.20%
State and other taxes, net of federal tax benefit	3.80%	3.10%	3.10%
State income tax audit settlement	(13.50%)	0.00%	0.00%
Excess tax deficiencies	(0.70%)	(0.50%)	(7.10%)
Change in unrecognized tax benefits	1.10%	0.00%	(0.10%)
Change in valuation allowance	0.70%	(0.30%)	0.50%
Changes in tax rates and state tax laws	0.00%	3.40%	0.20%
General business credits	(0.70%)	(1.40%)	(0.90%)
Other	0.20%	0.30%	0.80%
Effective tax rate	13.00%	29.30%	19.70%

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Effective Income Tax Rate Reconciliation, Change in Unrecognized Tax Benefits

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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