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Derivative Financial Instruments Notional Amounts and Fair Values of Derivative Financial Instruments (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Derivative [Line Items]    
Derivative asset, fair value $ 61,827 $ 158,647
Derivative liability, gross liability (89,625) (86,327)
Interest Rate Lock Commitments [Member]    
Derivative [Line Items]    
Derivative asset, notional amount 152,457 261,428
Derivative liability, notional amount 59,123 2,549
Derivative asset, fair value 317 2,326
Derivative liability, gross liability (648) (23)
Forward Commitments [Member]    
Derivative [Line Items]    
Derivative asset, notional amount 33,475 51,000
Derivative liability, notional amount 0 0
Derivative asset, fair value 3,060 41
Derivative liability, gross liability 0 0
Interest Rate Swap with Customer [Member]    
Derivative [Line Items]    
Derivative asset, notional amount 1,620,877 3,213,924
Derivative liability, notional amount 2,272,730 752,462
Derivative asset, fair value 16,875 153,752
Derivative liability, gross liability (66,120) (4,766)
Interest Rate Swap With Counterparty [Member]    
Derivative [Line Items]    
Derivative asset, notional amount 2,272,730 752,462
Derivative liability, notional amount 1,620,877 3,213,924
Derivative asset, fair value 44,880 4,766
Derivative liability, gross liability (17,168) (79,889)
Balance Sheet Hedging Instruments    
Derivative [Line Items]    
Derivative asset, notional amount 900,000 500,000
Derivative liability, notional amount 100,000 500,000
Derivative asset, fair value 0 60
Derivative liability, gross liability (6,040) (1,432)
Foreign Exchange Contracts With Customer [Member]    
Derivative [Line Items]    
Derivative asset, notional amount 15,628 7,629
Derivative liability, notional amount 2,794 3,388
Derivative asset, fair value 339 229
Derivative liability, gross liability (60) (51)
Foreign Exchange Contracts With Correspondent Banks [Member]    
Derivative [Line Items]    
Derivative asset, notional amount 3,008 3,656
Derivative liability, notional amount 16,062 9,364
Derivative asset, fair value 72 69
Derivative liability, gross liability $ (297) $ (240)