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Derivative Financial Instruments - Notional and Fair Values (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Derivative [Line Items]    
Derivative liability $ 34,126 $ 19,911
IRLCs, net of loan funding probability    
Derivative [Line Items]    
Derivative asset 213,210 538,861
Derivative liability 0 0
Forward commitments    
Derivative [Line Items]    
Derivative asset 667,908 17,337
Derivative liability 34,126 19,911
Not Designated | IRLCs, net of loan funding probability    
Derivative [Line Items]    
Notional value 16,445,558 21,194,326
Not Designated | Forward commitments    
Derivative [Line Items]    
Notional value $ 22,671,123 $ 36,476,871