Income Taxes - Reconciliation Between the Federal Statutory Corporate Tax Rate and the Bancorp's Effective Tax Rate (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Statutory tax rate	21.00%	21.00%	21.00%
Increase (decrease) resulting from:
State taxes, net of federal benefit	1.70%	1.90%	2.50%
Tax-exempt income	(0.90%)	(0.80%)	(0.80%)
Tax credits and other tax benefits from CDC investments	(8.50%)	(7.70%)	(7.10%)
Proportional amortization of qualifying CDC investments	0.068	0.067	0.061
Other tax credits	(0.10%)	(0.70%)	(0.40%)
Other, net	0.60%	1.00%	(0.30%)
Effective tax rate	20.60%	21.40%	21.00%