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Loans And The Allowance For Loan Losses (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Gain on loans sold to FNMA $ 93 $ 133 $ 203
Overdrawn deposit accounts classified as loans $ 100 200  
Minimum percentage of loans reviewed annually 40.00%    
Impaired loans with no related allowance recorded $ 7,756 10,560  
Loan commitments to lend additional funds to debtors 0    
Loans restructured in troubled debt restructurings $ 5,090 5,767  
Period of timely payments before reversion to accruing status 6 months    
Nonaccruing [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loan commitments to lend additional funds to debtors $ 0 0  
Loans restructured in troubled debt restructurings 1,247 1,812  
Commercial And Industrial [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Impaired loans with no related allowance recorded 1,304 1,750  
Loans restructured in troubled debt restructurings 574 517  
Commercial And Industrial [Member] | Nonaccruing [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans restructured in troubled debt restructurings 532 508  
Consumer And Other [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Overdrawn deposit accounts classified as loans 100 200  
Impaired loans with no related allowance recorded  
Loans restructured in troubled debt restructurings 26 28  
Consumer And Other [Member] | Nonaccruing [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans restructured in troubled debt restructurings  
Total Real Estate Loans [Member] | Residential Real Estate [Member] | Mortgages [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Maximum amount of loan as percentage of appraised value 80.00%    
Unpaid principal balance $ 75,700 77,300  
Mortgage servicing rights 500 600  
Mortgage loans held-for-sale 300 500  
Impaired loans with no related allowance recorded 2,513 2,444  
Loans restructured in troubled debt restructurings 1,949 1,789  
Total Real Estate Loans [Member] | Residential Real Estate [Member] | Mortgages [Member] | Nonaccruing [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans restructured in troubled debt restructurings 227 689  
Total Real Estate Loans [Member] | Residential Real Estate [Member] | FNMA Loans [Member] | Mortgages [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Mortgages sold to FNMA 9,700 14,300  
Total Real Estate Loans [Member] | Commercial Real Estate [Member] | Mortgages [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Impaired loans with no related allowance recorded 2,123 3,888  
Loans restructured in troubled debt restructurings 1,617 1,732  
Total Real Estate Loans [Member] | Commercial Real Estate [Member] | Mortgages [Member] | Nonaccruing [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans restructured in troubled debt restructurings 313 $ 334  
Total Real Estate Loans [Member] | FHLBNY [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans pledged as collateral $ 207,000    
Minimum [Member] | Commercial And Industrial [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Variable rate repricing, period 3 years    
Minimum [Member] | Total Real Estate Loans [Member] | Residential Real Estate [Member] | Mortgages [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loan amortization period 10 years    
Minimum [Member] | Total Real Estate Loans [Member] | Commercial Real Estate [Member] | Mortgages [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Mortgage loans mature or subject to a rate call, period 3 years    
Maximum [Member] | Commercial And Industrial [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loan amortization period 5 years    
Variable rate repricing, period 5 years    
Maximum [Member] | Total Real Estate Loans [Member] | Residential Real Estate [Member] | Mortgages [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loan amortization period 30 years    
Maximum [Member] | Total Real Estate Loans [Member] | Commercial Real Estate [Member] | Mortgages [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loan amortization period 20 years    
Mortgage loans mature or subject to a rate call, period 5 years