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Derivative Instruments (Schedule Of Mortgage Banking Derivatives) (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Interest Rate Commitments [Member]    
Derivatives, Fair Value [Line Items]    
Notional Amount, Assets $ 122,198 $ 55,220
Fair value, Derivative 1,325 721
TBA Mortgage-Back Securities [Member]    
Derivatives, Fair Value [Line Items]    
Notional Amount, Assets 63,000 33,250
Fair value, Derivative $ (379) $ (342)