Federal and State Income Taxes - Summary of Effective Tax Rate (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Effective income tax rate reconciliation
Federal statutory rate	21.00%	21.00%	21.00%
State taxes, net of federal income tax benefit	3.60%	4.90%	4.80%
Tax-exempt interest income	(4.50%)	(4.30%)	(4.40%)
Tax credits	(5.50%)	(5.60%)	(2.80%)
Other, net	1.40%	0.70%	(0.50%)
Effective income tax rate	16.00%	16.70%	18.10%