Income Taxes - Income tax rate reconciliation (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	21.00%	21.00%	21.00%
Non-deductibility of goodwill	0.80%	0.00%	(17.90%)
Non-deductibility of officer's compensation	2.90%	2.20%	(0.90%)
State and other taxes, net of federal tax benefit	3.10%	3.10%	1.20%
Excess tax deficiencies or benefits	(0.50%)	(7.10%)	0.10%
Change in unrecognized tax benefits	0.00%	(0.10%)	2.00%
Change in valuation allowance	(0.30%)	0.50%	(1.50%)
Changes in tax rates and state tax laws	3.40%	0.20%	(0.40%)
General business credits	(1.40%)	(0.90%)	0.80%
Other	0.30%	0.80%	(0.20%)
Effective tax rate	29.30%	19.70%	4.20%