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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, 2021
Mar. 31, 2020
Home Equity [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment $ 2,350 $ 24
Impaired Financing Receivable, Average Recorded Investment, Total 2,350 25
Home Equity [Member] | Financial Asset Acquired with Credit Deterioration [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment   1
Commercial Portfolio [Member] | Commercial and Industrial [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment 753 890
Impaired Loans with Allowance: Average Recorded Investment 157 4
Impaired Financing Receivable, Average Recorded Investment, Total 910 896
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
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment 31 40
Impaired Financing Receivable, Average Recorded Investment, Total 31 40
Commercial Portfolio [Member] | Commercial Real Estate [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment 4,405 7,430
Impaired Loans with Allowance: Average Recorded Investment 880 550
Impaired Financing Receivable, Average Recorded Investment, Total 6,699 9,400
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 1,414 1,420
Residential Portfolio [Member] | Residential Mortgage [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment 787 782
Impaired Loans with No Allowance: Interest Income Recognized 8 6
Impaired Financing Receivable, Average Recorded Investment, Total 1,104 1,156
Impaired Financing Receivable, Interest Income Recognized, Total 8 6
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 $ 317 $ 374