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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, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Home Equity [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | $ 2,396 | $ 27 | $ 1,210 | $ 38
Impaired Financing Receivable, Average Recorded Investment, Total | 2,396 | 31 | 1,211 | 42
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 No Allowance: Average Recorded Investment | 932 |  | 911 |
Impaired Loans with Allowance: Average Recorded Investment | 130 | 38 | 67 | 1,202
Impaired Loans with Allowance: Interest Income Recognized |  |  |  | 3
Impaired Financing Receivable, Average Recorded Investment, Total | 1,062 | 49 | 979 | 1,224
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 | 1 | 22
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 32 | 40 | 36 | 40
Impaired Loans with No Allowance: Interest Income Recognized |  | 4 |  |
Impaired Loans with Allowance: Average Recorded Investment |  |  |  | 183
Impaired Financing Receivable, Average Recorded Investment, Total | 32 | 40 | 36 | 223
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 | 7,171 | 1,917 | 7,325 | 2,697
Impaired Loans with No Allowance: Interest Income Recognized | 5 |  | 5 | 11
Impaired Loans with Allowance: Average Recorded Investment | 560 | 617 | 530 | 633
Impaired Financing Receivable, Average Recorded Investment, Total | 9,159 | 4,164 | 9,278 | 4,932
Impaired Financing Receivable, Interest Income Recognized, Total | 5 |  | 5 | 11
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 | 1,428 | 1,630 | 1,423 | 1,602
Residential Portfolio [Member] | Residential Mortgage [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 805 | 889 | 794 | 1,151
Impaired Loans with No Allowance: Interest Income Recognized | 6 | 7 | 19 | 21
Impaired Financing Receivable, Average Recorded Investment, Total | 1,152 | 1,944 | 1,155 | 2,303
Impaired Financing Receivable, Interest Income Recognized, Total | 6 | 7 | 19 | 21
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 | $ 347 | $ 1,055 | $ 361 | $ 1,152

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