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Loans (Summary Of Major Classifications For Loans) (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Gross loans $ 3,074,173 $ 3,046,226
Allowance for loan losses (19,209) (19,730)
Net Loans 3,054,964 3,026,496
Residential Real Estate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Gross loans 1,444,795 1,451,462
Allowance for loan losses (6,723) (6,680)
Home Equity [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Gross loans 139,165 141,965
Allowance for loan losses (1,299) (1,417)
Commercial And Industrial [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Gross loans 205,011 185,667
Allowance for loan losses (4,283) (4,206)
Commercial Real Estate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Gross loans 1,250,106 1,229,516
Allowance for loan losses (6,004) (6,573)
Consumer Loan [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Gross loans 32,043 32,545
Allowance for loan losses (64) (82)
Demand Deposit Account Overdrafts [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Gross loans 3,053 5,071
Allowance for loan losses $ (836) $ (772)