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Loan Quality And Allowance For Loan Losses (Troubled Debt Restructuring Loans) (Details)
$ in Thousands
 6 Months Ended
Jun. 30, 2017
USD ($)
item
contract
Jun. 30, 2016
USD ($)
item
Dec. 31, 2016
USD ($)
contract
Financing Receivable, Modifications [Line Items]      
Troubled Debt Restructurings: Number of Contracts | contract 17   17
Troubled Debt Restructurings: Recorded Investment $ 12,523   $ 13,419
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Number of Contracts | contract 2   2
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Recorded Investment $ 746   $ 1,401
New During Period, Number of Contracts | item 0    
Performing [Member]      
Financing Receivable, Modifications [Line Items]      
Troubled Debt Restructurings: Recorded Investment [1] $ 11,777   12,018
Nonperforming [Member]      
Financing Receivable, Modifications [Line Items]      
Troubled Debt Restructurings: Recorded Investment [1] $ 746   $ 1,401
Residential Real Estate - Construction [Member]      
Financing Receivable, Modifications [Line Items]      
Troubled Debt Restructurings: Number of Contracts | contract 1   1
Troubled Debt Restructurings: Recorded Investment $ 473   $ 480
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Number of Contracts | contract  
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Recorded Investment  
Residential Real Estate - Construction [Member] | Performing [Member]      
Financing Receivable, Modifications [Line Items]      
Troubled Debt Restructurings: Recorded Investment [1] $ 473   $ 480
Residential Real Estate [Member]      
Financing Receivable, Modifications [Line Items]      
Troubled Debt Restructurings: Number of Contracts | contract 5   5
Troubled Debt Restructurings: Recorded Investment $ 864   $ 875
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Number of Contracts | contract 1   1
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Recorded Investment $ 151   $ 151
Residential Real Estate [Member] | Performing [Member]      
Financing Receivable, Modifications [Line Items]      
Troubled Debt Restructurings: Recorded Investment [1] 713   724
Residential Real Estate [Member] | Nonperforming [Member]      
Financing Receivable, Modifications [Line Items]      
Troubled Debt Restructurings: Recorded Investment [1] $ 151   $ 151
Commercial Real Estate [Member]      
Financing Receivable, Modifications [Line Items]      
Troubled Debt Restructurings: Number of Contracts | contract 11   11
Troubled Debt Restructurings: Recorded Investment $ 11,186   $ 12,064
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Number of Contracts | contract 1   1
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Recorded Investment $ 595   $ 1,250
New During Period, Number of Contracts | item   1  
New During Period, Pre-TDR Modification   $ 525  
New During Period, After-TDR Modification   525  
New During Period, Recorded Investment   $ 504  
Commercial Real Estate [Member] | Performing [Member]      
Financing Receivable, Modifications [Line Items]      
Troubled Debt Restructurings: Recorded Investment [1] 10,591   10,814
Commercial Real Estate [Member] | Nonperforming [Member]      
Financing Receivable, Modifications [Line Items]      
Troubled Debt Restructurings: Recorded Investment [1] $ 595   $ 1,250
[1] The performing status is determined by the loan's compliance with the modified terms.