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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 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Home Equity [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment $ 27 $ 17 $ 38 $ 148
Impaired Financing Receivable, Average Recorded Investment, Total 31 18 42 148
Home Equity [Member] | Financial Asset Acquired with Credit Deterioration [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment 4 1 4  
Commercial Portfolio [Member] | Commercial and Industrial [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with Allowance: Average Recorded Investment 38 4,425 1,202 4,424
Impaired Loans with Allowance: Interest Income Recognized     3  
Impaired Financing Receivable, Average Recorded Investment, Total 49 4,449 1,224 4,445
Impaired Financing Receivable, Interest Income Recognized, Total     3  
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 11 24 22 21
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment 40   40  
Impaired Loans with No Allowance: Interest Income Recognized 4      
Impaired Loans with Allowance: Average Recorded Investment   367 183 367
Impaired Financing Receivable, Average Recorded Investment, Total 40 367 223 367
Impaired Financing Receivable, Interest Income Recognized, Total 4      
Commercial Portfolio [Member] | Commercial Real Estate [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment 1,917 1,872 2,697 3,040
Impaired Loans with No Allowance: Interest Income Recognized     11 3
Impaired Loans with Allowance: Average Recorded Investment 617 703 633 456
Impaired Financing Receivable, Average Recorded Investment, Total 4,164 4,045 4,932 4,861
Impaired Financing Receivable, Interest Income Recognized, Total   7 11 26
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 1,630 1,470 1,602 1,365
Impaired Loans with No Allowance: Interest Income Recognized   7   23
Residential Portfolio [Member] | Residential Mortgage [Member]        
Financing Receivable, Impaired [Line Items]        
Impaired Loans with No Allowance: Average Recorded Investment 889 780 1,151 769
Impaired Loans with No Allowance: Interest Income Recognized 7 11 21 27
Impaired Financing Receivable, Average Recorded Investment, Total 1,944 1,457 2,303 1,495
Impaired Financing Receivable, Interest Income Recognized, Total 7 11 21 27
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 $ 1,055 $ 677 $ 1,152 $ 726