Contingencies - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Loss Contingencies [Line Items]
Unused commitments to extend credit	$ 4,469.0	$ 5,030.0
Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Potential exposure to credit loss in the event of nonperformance	$ 127.5	127.8
Letters of credit, maturity term - maximum	3 years
Collateral held, fair value	$ 27.9	$ 32.0