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Derivative Instruments (Schedule Of Mortgage Banking Derivatives) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Derivatives, Fair Value [Line Items]    
Fair Value, Derivative $ 17 $ 56
Interest Rate Commitments [Member]    
Derivatives, Fair Value [Line Items]    
Notional Amount, Assets 55,220 2,390
Fair Value, Derivative 721 $ 11
TBA Mortgage-Back Securities [Member]    
Derivatives, Fair Value [Line Items]    
Notional Amount, Assets 33,250  
Fair Value, Derivative $ (342)