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Derivative Financial Instruments - Derivative Financial Instruments, their Fair Values, and Balance Sheet Location (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Derivatives Fair Value [Line Items]    
Derivative asset $ 104,111 $ 161,473
Derivative liabilities 111,357 154,058
Interest Rate Swap Agreements:    
Derivatives Fair Value [Line Items]    
Derivative asset 104,059 161,430
Derivative liabilities 111,344 154,055
Interest Rate Swap Agreements: | Derivatives designated as hedging instruments    
Derivatives Fair Value [Line Items]    
Derivative asset 2,551 14,507
Derivative liabilities 9,713 7,039
Interest Rate Swap Agreements: | Derivatives not designated as hedging instruments    
Derivatives Fair Value [Line Items]    
Derivative asset 101,508 146,923
Derivative liabilities 101,631 147,016
Interest Rate Lock Commitments | Derivatives not designated as hedging instruments    
Derivatives Fair Value [Line Items]    
Derivative asset 49 34
Derivative liabilities 0 0
Forward Commitments | Derivatives not designated as hedging instruments    
Derivatives Fair Value [Line Items]    
Derivative asset 3 9
Derivative liabilities $ 13 $ 3