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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, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Home Equity [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment $ 95 $ 90 $ 208 $ 101
Impaired Loans with No Allowance: Interest Income Recognized       2
Impaired Financing Receivable, Average Recorded Investment, Total 95 90 208 101
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   18
Impaired Loans with Allowance: Average Recorded Investment 4,349   3,519  
Impaired Financing Receivable, Average Recorded Investment, Total 4,372 36 3,539 18
Commercial Portfolio [Member] | Commercial and Industrial [Member] | Financial Asset Acquired with Credit Deterioration [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment 23   20  
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment   473 17 313
Impaired Loans with Allowance: Average Recorded Investment 367 240 366 144
Impaired Financing Receivable, Average Recorded Investment, Total 367 1,039 383 457
Impaired Financing Receivable, Interest Income Recognized, Total   2    
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member] | Financial Asset Acquired with Credit Deterioration [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment   326    
Impaired Loans with No Allowance: Interest Income Recognized   2    
Commercial Portfolio [Member] | Commercial Real Estate [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment 2,650 644 2,306 524
Impaired Loans with No Allowance: Interest Income Recognized 3 110 3 279
Impaired Loans with Allowance: Average Recorded Investment 1,029 2,792 1,367 2,660
Impaired Financing Receivable, Average Recorded Investment, Total 5,134 4,080 5,674 3,922
Impaired Financing Receivable, Interest Income Recognized, Total 10 220 17 389
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Financial Asset Acquired with Credit Deterioration [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment 1,455 644 2,001 738
Impaired Loans with No Allowance: Interest Income Recognized 7 110 14 110
Residential Portfolio [Member] | Residential Mortgage [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment 699 860 796 843
Impaired Loans with No Allowance: Interest Income Recognized 7 7 14 18
Impaired Loans with Allowance: Average Recorded Investment   66   40
Impaired Financing Receivable, Average Recorded Investment, Total 1,338 926 1,882 1,233
Impaired Financing Receivable, Interest Income Recognized, Total 7 $ 7 14 18
Residential Portfolio [Member] | Residential Mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment $ 639   $ 1,086 $ 350