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Loan Quality And Allowance For Loan Losses (Troubled Debt Restructuring Loans) (Details)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
USD ($)
item
contract
Mar. 31, 2016
USD ($)
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 $ 13,297   $ 13,419
Troubled Debt Restructurings That Have Defaulted on Modified Terms YTD: Number of Contracts | contract 2   2
Troubled Debt Restructurings That Have Defaulted on Modified Terms YTD: Recorded Investment $ 1,401   $ 1,401
New During Period, Number of Contracts | item 0    
Performing [Member]      
Financing Receivable, Modifications [Line Items]      
Troubled Debt Restructurings: Recorded Investment [1] $ 11,896   12,018
Nonperforming [Member]      
Financing Receivable, Modifications [Line Items]      
Troubled Debt Restructurings: Recorded Investment [1] $ 1,401   $ 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 $ 478   $ 480
Troubled Debt Restructurings That Have Defaulted on Modified Terms YTD: Number of Contracts | contract  
Troubled Debt Restructurings That Have Defaulted on Modified Terms YTD: Recorded Investment  
Residential Real Estate - Construction [Member] | Performing [Member]      
Financing Receivable, Modifications [Line Items]      
Troubled Debt Restructurings: Recorded Investment [1] $ 478   $ 480
Residential Real Estate [Member]      
Financing Receivable, Modifications [Line Items]      
Troubled Debt Restructurings: Number of Contracts | contract 5   5
Troubled Debt Restructurings: Recorded Investment $ 869   $ 875
Troubled Debt Restructurings That Have Defaulted on Modified Terms YTD: Number of Contracts | contract 1   1
Troubled Debt Restructurings That Have Defaulted on Modified Terms YTD: Recorded Investment $ 151   $ 151
Residential Real Estate [Member] | Performing [Member]      
Financing Receivable, Modifications [Line Items]      
Troubled Debt Restructurings: Recorded Investment [1] 718   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 $ 11,950   $ 12,064
Troubled Debt Restructurings That Have Defaulted on Modified Terms YTD: Number of Contracts | contract 1   1
Troubled Debt Restructurings That Have Defaulted on Modified Terms YTD: Recorded Investment $ 1,250   $ 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   $ 508  
Commercial Real Estate [Member] | Performing [Member]      
Financing Receivable, Modifications [Line Items]      
Troubled Debt Restructurings: Recorded Investment [1] 10,700   10,814
Commercial Real Estate [Member] | Nonperforming [Member]      
Financing Receivable, Modifications [Line Items]      
Troubled Debt Restructurings: Recorded Investment [1] $ 1,250   $ 1,250
[1] The performing status is determined by the loan's compliance with the modified terms.