Income Taxes - Effective Tax Rate (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Effective tax rate differs from the federal statutory rate
Statutory Federal income tax rate (as a percent)	21.00%	21.00%	21.00%
State income taxes, net of federal tax benefit (as a percent)	8.30%	8.40%	8.10%
Stock option/restricted stock windfall tax benefit (as a percent)	0.10%	(0.10%)	(0.20%)
Increase in cash surrender value of life insurance (as a percent)	(0.50%)	(0.40%)	(0.60%)
Low income housing credits, net of investment losses (as a percent)	(0.20%)	(0.20%)	(0.30%)
Non-taxable interest income (as a percent)	(0.20%)	(0.20%)	(0.50%)
Split dollar term insurance (as a percent)	0.00%	0.00%	0.10%
ISO stock exercise (as a percent)	0.00%	0.00%	(0.10%)
Other, net (as a percent)	0.20%	1.00%	0.10%
Effective tax rate (as a percent)	28.70%	29.50%	27.60%