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Loans Receivable And Credit Quality (Schedule Of Nonaccrual Loans) (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Non-Accrual Loans $ 378 $ 790
Commercial Real Estate [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Non-Accrual Loans   104
Residential Real Estate [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Non-Accrual Loans $ 378 $ 686