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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 | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Home Equity [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | $ 2,336 | $ 1,215 | $ 2,346 | $ 818
Impaired Financing Receivable, Average Recorded Investment, Total | 2,336 | 1,216 | 2,346 | 819
Home Equity [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment |  | 1 |  | 1
Commercial Portfolio [Member] | Commercial and Industrial [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 72 | 955 | 502 | 933
Impaired Loans with Allowance: Average Recorded Investment | 221 | 99 | 177 | 66
Impaired Financing Receivable, Average Recorded Investment, Total | 293 | 1,054 | 679 | 1,000
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 |  |  |  | 1
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 26 | 36 | 28 | 37
Impaired Financing Receivable, Average Recorded Investment, Total | 26 | 36 | 28 | 37
Commercial Portfolio [Member] | Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 778 | 7,004 | 3,257 | 7,362
Impaired Loans with No Allowance: Interest Income Recognized | 1 |  | 1 |
Impaired Loans with Allowance: Average Recorded Investment | 1,793 | 835 | 1,491 | 634
Impaired Financing Receivable, Average Recorded Investment, Total | 3,969 | 9,262 | 6,154 | 9,417
Impaired Financing Receivable, Interest Income Recognized, Total | 1 |  | 1 |
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 | 1,398 | 1,423 | 1,406 | 1,421
Residential Portfolio [Member] | Residential Mortgage [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 759 | 762 | 778 | 780
Impaired Loans with No Allowance: Interest Income Recognized | 6 | 6 | 14 | 13
Impaired Financing Receivable, Average Recorded Investment, Total | 1,059 | 1,122 | 1,087 | 1,147
Impaired Financing Receivable, Interest Income Recognized, Total | 6 | 6 | 14 | 13
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 | $ 300 | $ 360 | $ 309 | $ 367

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