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Loans and Allowance for Loan and Lease Losses (Average Recorded Investment Of Impaired Loans And Related Interest Income By Loan Portfolio Class) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Home Equity [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment $ 90 $ 66 $ 101 $ 53
Impaired Loans with No Allowance: Interest Income Recognized     2  
Impaired Loans with Allowance: Average Recorded Investment   17   19
Impaired Financing Receivable, Average Recorded Investment, Total 90 83 101 72
Impaired Financing Receivable, Interest Income Recognized, Total     2  
Commercial Portfolio [Member] | Commercial and Industrial [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment 36 11 18 14
Impaired Loans with Allowance: Average Recorded Investment   59   61
Impaired Financing Receivable, Average Recorded Investment, Total 36 70 18 75
Commercial Portfolio [Member] | Commercial Real Estate [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment 644 960 524 1,001
Impaired Loans with No Allowance: Interest Income Recognized     279  
Impaired Loans with Allowance: Average Recorded Investment 2,792 2,201 2,660 1,851
Impaired Financing Receivable, Average Recorded Investment, Total 4,080 4,104 3,922 3,786
Impaired Financing Receivable, Interest Income Recognized, Total 110   389  
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment 644 943 738 934
Impaired Loans with No Allowance: Interest Income Recognized 110   110  
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment 473   313  
Impaired Loans with Allowance: Average Recorded Investment 240   144  
Impaired Financing Receivable, Average Recorded Investment, Total 713   457  
Residential Portfolio [Member] | Residential Mortgage [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment 860 831 843 777
Impaired Loans with No Allowance: Interest Income Recognized 7 7 18 9
Impaired Loans with Allowance: Average Recorded Investment 66   40  
Impaired Financing Receivable, Average Recorded Investment, Total 1,252 1,208 1,233 1,152
Impaired Financing Receivable, Interest Income Recognized, Total 9 7 18 13
Residential Portfolio [Member] | Residential Mortgage [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment 326 $ 377 $ 350 375
Impaired Loans with No Allowance: Interest Income Recognized $ 2     $ 4