Contingencies - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Loss Contingencies [Line Items]
Unused commitments to extend credit	$ 4,792.0	$ 5,424.0
Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Potential exposure to credit loss in the event of nonperformance	$ 139.5	137.3
Letters of credit, maturity term - maximum	3 years
Collateral held, fair value	$ 33.1	$ 31.3