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Derivative Financial Instruments - Derivative Financial Instruments and the Amount and Location of the Net Gains or Losses Recognized in the Statements of Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Derivative Instruments Gain Loss [Line Items]        
Net gains (losses) recognized in the statements of income $ 2,028 $ 6,205 $ 3,132 $ 12,277
Derivatives designated as hedging instruments | Interest Income on Investment Securities Available-for-Sale        
Derivative Instruments Gain Loss [Line Items]        
Net gains (losses) recognized in the statements of income 1,823 (3,145) 7,497 (20,147)
Derivatives designated as hedging instruments | Interest Income on Investment Securities Available-for-Sale | Interest Rate Swap Agreements:        
Derivative Instruments Gain Loss [Line Items]        
Net gains (losses) recognized in the statements of income (1,828) 3,082 (7,490) 19,975
Derivatives designated as hedging instruments | Interest Income on Investment Securities Available-for-Sale | Net Cash Settlements        
Derivative Instruments Gain Loss [Line Items]        
Net gains (losses) recognized in the statements of income (20) 2,736 (22) 5,457
Derivatives designated as hedging instruments | Interest and Fees on Loans and Leases        
Derivative Instruments Gain Loss [Line Items]        
Net gains (losses) recognized in the statements of income 3,417 (4,308) 11,789 (27,060)
Derivatives designated as hedging instruments | Interest and Fees on Loans and Leases | Interest Rate Swap Agreements:        
Derivative Instruments Gain Loss [Line Items]        
Net gains (losses) recognized in the statements of income (3,447) 4,222 (11,826) 26,824
Derivatives designated as hedging instruments | Interest and Fees on Loans and Leases | Net Cash Settlements        
Derivative Instruments Gain Loss [Line Items]        
Net gains (losses) recognized in the statements of income 1,976 3,367 3,509 6,715
Derivatives not designated as hedging instruments | Interest Rate Lock Commitments        
Derivative Instruments Gain Loss [Line Items]        
Net gains (losses) recognized in the statements of income $ 52 $ 122 $ 252 $ 245
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Mortgage Banking Mortgage Banking Mortgage Banking Mortgage Banking
Derivatives not designated as hedging instruments | Forward Commitments        
Derivative Instruments Gain Loss [Line Items]        
Net gains (losses) recognized in the statements of income $ 31 $ 119 $ (4) $ 215
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Mortgage Banking Mortgage Banking Mortgage Banking Mortgage Banking
Derivatives not designated as hedging instruments | Interest Rate Swap Agreements:        
Derivative Instruments Gain Loss [Line Items]        
Net gains (losses) recognized in the statements of income $ 9 $ 10 $ (10) $ 53
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other Other Other Other
Derivatives not designated as hedging instruments | Conversion Rate Swap Agreements        
Derivative Instruments Gain Loss [Line Items]        
Net gains (losses) recognized in the statements of income $ 15 $ 0 $ (563) $ 0
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Investment Securities Losses, Net Investment Securities Losses, Net Investment Securities Losses, Net Investment Securities Losses, Net