Commitments and Contingencies - Commitments and Letters of Credit (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Other Commitments [Line Items]
Unused commitments to extend credit	$ 2,719,330	$ 2,711,591
Commitments to extend credit
Other Commitments [Line Items]
Unused commitments to extend credit	2,653,613	2,644,139
Standby letters of credit
Other Commitments [Line Items]
Unused commitments to extend credit	$ 65,717	$ 67,452