Contingencies - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Loss Contingencies [Line Items]
Unused commitments to extend credit	$ 4,448.0	$ 4,387.0
Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Potential exposure to credit loss in the event of nonperformance	$ 158.6	$ 117.9
Letters of credit, maturity term - maximum	3 years

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details