Income Taxes, Major Reasons for the Difference in Effective Income Tax Rate from the Federal Tax Rate (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Effective Income Tax Rate Reconciliation
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent	10.60%	7.40%	3.40%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	2.20%	0.30%	4.20%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Life Insurance, Percent	2.10%	1.10%	0.50%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	7.90%	4.70%	1.60%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Percent	(0.20%)	0.00%	(0.20%)
Effective income tax rate reconciliation, Portfolio optimization	(25.70%)	0.00%	0.00%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent	24.30%	0.00%	0.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent	4.80%	3.00%	0.70%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent	2.30%	0.00%	0.00%
Effective Income Tax Rate Reconciliation, Changes in unrecognized tax benefits	0.40%	0.00%	0.00%
Effective Income Tax Rate Reconciliation, prior year return to provision	(0.50%)	0.00%	0.00%
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent	0.40%	0.10%	0.10%
Effective Income Tax Rate Reconciliation, Percent, Total	8.40%	11.20%	20.30%