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Loans And The Allowance For Loan Losses (Schedule Of Loan Portfolio Composition) (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Sep. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans before deferred loan origination costs $ 996,908 $ 941,729 $ 912,137
Net deferred loan origination costs 1,097 783 715
Total gross loans 998,005 942,512  
Allowance for loan losses (14,182) (13,916)  
Loans, net 983,823 928,596  
Home Equities [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans before deferred loan origination costs 67,343 66,234  
Commercial And Industrial [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans before deferred loan origination costs 207,110 197,371 187,440
Consumer And Other Loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans before deferred loan origination costs 1,521 1,417 1,531
Total Real Estate Loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans before deferred loan origination costs 788,277 742,941  
Total Real Estate Loans [Member] | Residential Mortgages [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans before deferred loan origination costs [1] 127,796   112,899
Total Real Estate Loans [Member] | Residential Mortgages [Member] | Mortgages [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans before deferred loan origination costs 125,946 118,542  
Total Real Estate Loans [Member] | Residential Mortgages [Member] | Construction [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans before deferred loan origination costs 1,850 2,540  
Total Real Estate Loans [Member] | Commercial Real Estate Mortgages [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans before deferred loan origination costs 593,138 [1] 555,625 546,129 [1]
Total Real Estate Loans [Member] | Commercial Real Estate Mortgages [Member] | Mortgages [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans before deferred loan origination costs 492,692 462,385  
Total Real Estate Loans [Member] | Commercial Real Estate Mortgages [Member] | Construction [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans before deferred loan origination costs 100,446 93,240  
Total Real Estate Loans [Member] | Home Equities [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans before deferred loan origination costs $ 67,343 $ 66,234 $ 64,138
[1] Includes construction loans