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Derivative Financial Instruments Notional Amounts and Fair Values of Derivative Financial Instruments (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Derivative [Line Items]    
Derivative asset, fair value $ 129,017 $ 159,250
Derivative liability, gross liability (177,145) (254,332)
Interest Rate Lock Commitments [Member]    
Derivative [Line Items]    
Derivative asset, notional amount 188,054 171,933
Derivative liability, notional amount 1,803 3,888
Derivative asset, fair value 753 389
Derivative liability, gross liability (3) (58)
Forward Commitments [Member]    
Derivative [Line Items]    
Derivative asset, notional amount 0 51,250
Derivative liability, notional amount 63,750 0
Derivative asset, fair value 0 363
Derivative liability, gross liability (490) 0
Interest Rate Swap with Customer [Member]    
Derivative [Line Items]    
Derivative asset, notional amount 1,918,631 767,905
Derivative liability, notional amount 2,921,400 3,976,294
Derivative asset, fair value 42,131 8,480
Derivative liability, gross liability (134,590) (239,058)
Interest Rate Swap With Counterparty [Member]    
Derivative [Line Items]    
Derivative asset, notional amount 2,921,400 3,976,294
Derivative liability, notional amount 1,918,631 767,905
Derivative asset, fair value 78,589 150,480
Derivative liability, gross liability (42,501) (10,734)
Balance Sheet Hedging Instruments    
Derivative [Line Items]    
Derivative asset, notional amount 2,450,000 2,500,000
Derivative liability, notional amount 350,000 1,400,000
Derivative asset, fair value 7,147 227
Derivative liability, gross liability (49) (2,971)
Foreign Exchange Contracts With Customer [Member]    
Derivative [Line Items]    
Derivative asset, notional amount 2,955 28,327
Derivative liability, notional amount 16,700 693
Derivative asset, fair value 29 1,619
Derivative liability, gross liability (965) (27)
Foreign Exchange Contracts With Correspondent Banks [Member]    
Derivative [Line Items]    
Derivative asset, notional amount 18,930 4,059
Derivative liability, notional amount 1,154 32,406
Derivative asset, fair value 1,150 63
Derivative liability, gross liability $ (5) $ (1,569)