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Derivative Financial Instruments Notional Amounts and Fair Values of Derivative Financial Instruments (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Derivative [Line Items]    
Derivative asset, fair value $ 228,071 $ 166,715
Derivative liability, gross liability (373,170) (296,766)
Interest Rate Lock Commitments [Member]    
Derivative [Line Items]    
Derivative asset, notional amount 126,886 70,836
Derivative liability, notional amount 4,359 4,939
Derivative asset, fair value 373 182
Derivative liability, gross liability (39) (51)
Forward Commitments [Member]    
Derivative [Line Items]    
Derivative asset, notional amount 53,000 0
Derivative liability, notional amount 0 10,000
Derivative asset, fair value 653 0
Derivative liability, gross liability 0 (147)
Interest Rate Swap with Customer [Member]    
Derivative [Line Items]    
Derivative asset, notional amount 121,589 171,317
Derivative liability, notional amount 4,254,247 3,802,480
Derivative asset, fair value 635 3,337
Derivative liability, gross liability (367,905) (280,401)
Interest Rate Swap With Counterparty [Member]    
Derivative [Line Items]    
Derivative asset, notional amount 4,254,247 3,802,480
Derivative liability, notional amount 121,589 171,317
Derivative asset, fair value 226,882 161,956
Derivative liability, gross liability (1,001) (3,703)
Balance Sheet Hedging Instruments    
Derivative [Line Items]    
Derivative asset, notional amount 700,000 600,000
Derivative liability, notional amount 2,300,000 1,000,000
Derivative asset, fair value 239 1,321
Derivative liability, gross liability (3,584) (12,163)
Foreign Exchange Contracts With Customer [Member]    
Derivative [Line Items]    
Derivative asset, notional amount 30,841 11,123
Derivative liability, notional amount 13,994 3,672
Derivative asset, fair value 980 571
Derivative liability, gross liability (400) (85)
Foreign Exchange Contracts With Correspondent Banks [Member]    
Derivative [Line Items]    
Derivative asset, notional amount 10,984 4,887
Derivative liability, notional amount 23,610 8,280
Derivative asset, fair value 315 101
Derivative liability, gross liability $ (680) $ (499)