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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, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Home Equity [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | $ 29 | $ 95 | $ 29 | $ 208
Impaired Financing Receivable, Average Recorded Investment, Total | 33 | 95 | 33 | 208
Home Equity [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 4 |  | 4 |
Commercial Portfolio [Member] | Commercial and Industrial [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with Allowance: Average Recorded Investment | 140 | 4,349 | 1,603 | 3,519
Impaired Loans with Allowance: Interest Income Recognized |  |  | 3 |
Impaired Financing Receivable, Average Recorded Investment, Total | 169 | 4,372 | 1,632 | 3,539
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 | 23 | 29 | 20
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 40 |  | 27 | 17
Impaired Loans with Allowance: Average Recorded Investment | 183 | 367 | 245 | 366
Impaired Financing Receivable, Average Recorded Investment, Total | 223 | 367 | 272 | 383
Commercial Portfolio [Member] | Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 2,273 | 2,650 | 2,289 | 2,306
Impaired Loans with No Allowance: Interest Income Recognized |  | 3 |  | 3
Impaired Loans with Allowance: Average Recorded Investment | 513 | 1,029 | 477 | 1,367
Impaired Financing Receivable, Average Recorded Investment, Total | 4,388 | 5,134 | 4,355 | 5,674
Impaired Financing Receivable, Interest Income Recognized, Total |  | 10 |  | 17
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 | 1,602 | 1,455 | 1,589 | 2,001
Impaired Loans with No Allowance: Interest Income Recognized |  | 7 |  | 14
Residential Portfolio [Member] | Residential Mortgage [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 880 | 699 | 857 | 796
Impaired Loans with No Allowance: Interest Income Recognized | 7 | 7 | 14 | 14
Impaired Financing Receivable, Average Recorded Investment, Total | 2,102 | 1,338 | 2,076 | 1,882
Impaired Financing Receivable, Interest Income Recognized, Total | 7 | 7 | 14 | 14
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 | $ 1,222 | $ 639 | $ 1,219 | $ 1,086

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