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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
Mar. 31, 2020
Mar. 31, 2019
Home Equity [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment $ 24 $ 30
Impaired Financing Receivable, Average Recorded Investment, Total 25 34
Home Equity [Member] | Financial Asset Acquired with Credit Deterioration [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment 1 4
Commercial Portfolio [Member] | Commercial and Industrial [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment 890  
Impaired Loans with Allowance: Average Recorded Investment 4 2,366
Impaired Loans with Allowance: Interest Income Recognized   3
Impaired Financing Receivable, Average Recorded Investment, Total 896 2,395
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 2 29
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment 40  
Impaired Loans with Allowance: Average Recorded Investment   367
Impaired Financing Receivable, Average Recorded Investment, Total 40 367
Commercial Portfolio [Member] | Commercial Real Estate [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment 7,430 2,001
Impaired Loans with Allowance: Average Recorded Investment 550 776
Impaired Financing Receivable, Average Recorded Investment, Total 9,400 4,352
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 1,420 1,575
Residential Portfolio [Member] | Residential Mortgage [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment 782 858
Impaired Loans with No Allowance: Interest Income Recognized 6 7
Impaired Financing Receivable, Average Recorded Investment, Total 1,156 2,072
Impaired Financing Receivable, Interest Income Recognized, Total 6 7
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 $ 374 $ 1,214