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Loans and Allowance for Loan and Lease Losses (Impaired Loans by Loan Portfolio Class) (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Home Equity [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with No Allowance: Recorded Investment | $ 2,339 | $ 2,365
Impaired Loans with No Allowance: Unpaid Principal Balance | 2,341 | 2,395
Impaired Loans: Total Recorded Investment | 2,339 | 2,365
Impaired Loans: Total Unpaid Principal Balance | 2,353 | 2,408
Home Equity [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with No Allowance: Unpaid Principal Balance | 12 | 13
Commercial Portfolio [Member] | Commercial and Industrial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with No Allowance: Recorded Investment |  | 899
Impaired Loans with No Allowance: Unpaid Principal Balance | 31 | 931
Impaired Loans with Allowance: Recorded Investment | 218 | 553
Impaired Loans with Allowance: Unpaid Principal Balance | 249 | 574
Impaired Loans with Allowance: Related Allowance | 62 | 533
Impaired Loans: Total Recorded Investment | 218 | 1,452
Impaired Loans: Total Unpaid Principal Balance | 280 | 1,505
Commercial Portfolio [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with No Allowance: Recorded Investment | 961 | 8,215
Impaired Loans with No Allowance: Unpaid Principal Balance | 1,340 | 8,574
Impaired Loans with Allowance: Recorded Investment | 2,712 | 887
Impaired Loans with Allowance: Unpaid Principal Balance | 2,768 | 994
Impaired Loans with Allowance: Related Allowance | 1,332 | 274
Impaired Loans: Total Recorded Investment | 5,054 | 10,521
Impaired Loans: Total Unpaid Principal Balance | 5,795 | 11,261
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with No Allowance: Recorded Investment | 1,381 | 1,419
Impaired Loans with No Allowance: Unpaid Principal Balance | 1,687 | 1,693
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with No Allowance: Recorded Investment | 23 | 31
Impaired Loans with No Allowance: Unpaid Principal Balance | 27 | 34
Impaired Loans: Total Recorded Investment | 23 | 31
Impaired Loans: Total Unpaid Principal Balance | 27 | 34
Residential Portfolio [Member] | Residential Mortgage [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with No Allowance: Recorded Investment | 759 | 818
Impaired Loans with No Allowance: Unpaid Principal Balance | 791 | 842
Impaired Loans: Total Recorded Investment | 1,048 | 1,141
Impaired Loans: Total Unpaid Principal Balance | 1,329 | 1,410
Residential Portfolio [Member] | Residential Mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with No Allowance: Recorded Investment | 289 | 323
Impaired Loans with No Allowance: Unpaid Principal Balance | $ 538 | $ 568

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