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Derivatives (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]          
Counterparty default losses on forward contracts $ 0 $ 0 $ 0 $ 0  
Credit Derivatives [Line Items]          
Commitments    
Collateral required to be posted under agreements 89,100   89,100   88,300
Variation Margin Adjustment 197,400   197,400   166,300
Interest rate futures          
Credit Derivatives [Line Items]          
Derivative, notional amount 159,000   159,000   150,000
Mortgage-Backed Security          
Credit Derivatives [Line Items]          
Derivative, notional amount 23,000   23,000   36,000
Interest rate swaps          
Credit Derivatives [Line Items]          
Derivative, notional amount         4,700,000
Derivative Asset, Notional Amount 4,500,000   4,500,000    
Commitments To Originate Loans Held For Sale          
Credit Derivatives [Line Items]          
Commitments 54,322   54,322   20,600
Interest rate forward sales commitments          
Credit Derivatives [Line Items]          
Commitments $ 82,618   $ 82,618   $ 39,500