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Commitments and Contingencies - Credit Commitments (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Credit Commitments [Line Items]    
Credit Commitments $ 3,223,003 $ 3,234,095
Unfunded Commitments to Extend Credit    
Credit Commitments [Line Items]    
Credit Commitments 3,114,621 3,128,272
Standby Letters of Credit    
Credit Commitments [Line Items]    
Credit Commitments 92,605 96,484
Commercial Letters of Credit    
Credit Commitments [Line Items]    
Credit Commitments $ 15,777 $ 9,339