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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

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