Income Taxes - Reasons for Income Tax Provision Differences to Statutory Rate (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Tax at U.S. statutory rate	21.00%	21.00%	21.00%
Changes in taxes resulting from :
State taxes, net of federal benefit	2.70%	2.00%	1.50%
Non-deductible expenses	1.10%	0.50%	0.40%
Incentive compensation	(1.50%)	(1.00%)	(1.30%)
Low income housing tax credits	(1.00%)	(1.10%)	(1.60%)
Other, net	(1.30%)	(1.50%)	(1.70%)
Income tax provision	21.00%	19.90%	18.30%