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Loans (Summary Of Major Classifications For Loans) (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Gross loans $ 3,083,767 $ 3,046,226
Allowance for loan losses (19,063) (19,730)
Net Loans 3,064,704 3,026,496
Residential Real Estate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Gross loans 1,455,578 1,451,462
Allowance for loan losses (6,647) (6,680)
Home Equity [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Gross loans 139,534 141,965
Allowance for loan losses (1,354) (1,417)
Commercial And Industrial [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Gross loans 197,429 185,667
Allowance for loan losses (4,092) (4,206)
Commercial Real Estate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Gross loans 1,256,736 1,229,516
Allowance for loan losses (6,157) (6,573)
Consumer Loan [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Gross loans 30,860 32,545
Allowance for loan losses (73) (82)
Demand Deposit Account Overdrafts [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Gross loans 3,630 5,071
Allowance for loan losses $ (740) $ (772)