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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, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Home Equity [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | $ 2,379 | $ 2,396 | $ 2,364 | $ 1,210
Impaired Financing Receivable, Average Recorded Investment, Total | 2,379 | 2,396 | 2,364 | 1,211
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 | 5 | 932 | 379 | 911
Impaired Loans with Allowance: Average Recorded Investment | 217 | 130 | 187 | 67
Impaired Financing Receivable, Average Recorded Investment, Total | 222 | 1,062 | 566 | 979
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 | 23 | 32 | 27 | 36
Impaired Financing Receivable, Average Recorded Investment, Total | 23 | 32 | 27 | 36
Commercial Portfolio [Member] | Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 938 | 7,171 | 2,671 | 7,325
Impaired Loans with No Allowance: Interest Income Recognized |  | 5 | 1 | 5
Impaired Loans with Allowance: Average Recorded Investment | 1,503 | 560 | 1,192 | 530
Impaired Financing Receivable, Average Recorded Investment, Total | 3,809 | 9,159 | 5,246 | 9,278
Impaired Financing Receivable, Interest Income Recognized, Total |  | 5 | 1 | 5
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 | 1,368 | 1,428 | 1,383 | 1,423
Residential Portfolio [Member] | Residential Mortgage [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 1,018 | 805 | 902 | 794
Impaired Loans with No Allowance: Interest Income Recognized | 6 | 6 | 20 | 19
Impaired Financing Receivable, Average Recorded Investment, Total | 1,299 | 1,152 | 1,193 | 1,155
Impaired Financing Receivable, Interest Income Recognized, Total | 6 | 6 | 20 | 19
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 | $ 281 | $ 347 | $ 291 | $ 361

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