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Contingencies - Additional Information (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Loss Contingencies [Line Items]    
Unused commitments to extend credit $ 4,410.0 $ 4,469.0
Standby Letters of Credit [Member]    
Loss Contingencies [Line Items]    
Potential exposure to credit loss in the event of nonperformance $ 142.5 $ 127.5
Letters of credit, maturity term - maximum 3 years