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Derivative Instruments (Schedule Of Mortgage Banking Derivatives) (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Interest Rate Commitments [Member]    
Derivatives, Fair Value [Line Items]    
Notional Amount, Assets $ 242,571 $ 55,220
Fair value, Derivative 2,480 721
TBA Mortgage-Back Securities [Member]    
Derivatives, Fair Value [Line Items]    
Notional Amount, Assets 144,250 33,250
Fair value, Derivative $ (645) $ (342)