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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, 2019
Mar. 31, 2018
Home Equity [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment $ 30 $ 222
Impaired Financing Receivable, Average Recorded Investment, Total 34 222
Home Equity [Member] | Financial Asset Acquired with Credit Deterioration [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment 4  
Commercial Portfolio [Member] | Commercial and Industrial [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Allowance: Average Recorded Investment 2,366 4,404
Impaired Loans with Allowance: Interest Income Recognized 3  
Impaired Financing Receivable, Average Recorded Investment, Total 2,395 4,421
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 29 17
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Allowance: Average Recorded Investment 367 487
Impaired Financing Receivable, Average Recorded Investment, Total 367 487
Commercial Portfolio [Member] | Commercial Real Estate [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment 2,001 3,506
Impaired Loans with Allowance: Average Recorded Investment 776 1,406
Impaired Financing Receivable, Average Recorded Investment, Total 4,352 5,848
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 1,575 936
Residential Portfolio [Member] | Residential Mortgage [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Average Recorded Investment 858 714
Impaired Loans with No Allowance: Interest Income Recognized 7  
Impaired Financing Receivable, Average Recorded Investment, Total 2,072 1,157
Impaired Financing Receivable, Interest Income Recognized, Total 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 $ 1,214 $ 443