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Loans and Allowance for Loan and Lease Losses (Impaired Loans by Loan Portfolio Class) (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Home Equity [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with No Allowance: Recorded Investment | $ 2,420 | $ 2,365
Impaired Loans with No Allowance: Unpaid Principal Balance | 2,423 | 2,395
Impaired Loans: Total Recorded Investment | 2,420 | 2,365
Impaired Loans: Total Unpaid Principal Balance | 2,434 | 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 | 11 | 13
Commercial Portfolio [Member] | Commercial and Industrial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with No Allowance: Recorded Investment | 5 | 899
Impaired Loans with No Allowance: Unpaid Principal Balance | 36 | 931
Impaired Loans with Allowance: Recorded Investment | 216 | 553
Impaired Loans with Allowance: Unpaid Principal Balance | 247 | 574
Impaired Loans with Allowance: Related Allowance | 69 | 533
Impaired Loans: Total Recorded Investment | 221 | 1,452
Impaired Loans: Total Unpaid Principal Balance | 283 | 1,505
Commercial Portfolio [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with No Allowance: Recorded Investment | 920 | 8,215
Impaired Loans with No Allowance: Unpaid Principal Balance | 1,309 | 8,574
Impaired Loans with Allowance: Recorded Investment | 294 | 887
Impaired Loans with Allowance: Unpaid Principal Balance | 363 | 994
Impaired Loans with Allowance: Related Allowance | 129 | 274
Impaired Loans: Total Recorded Investment | 2,569 | 10,521
Impaired Loans: Total Unpaid Principal Balance | 3,262 | 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 | 1,355 | 1,419
Impaired Loans with No Allowance: Unpaid Principal Balance | 1,590 | 1,693
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with No Allowance: Recorded Investment | 22 | 31
Impaired Loans with No Allowance: Unpaid Principal Balance | 27 | 34
Impaired Loans: Total Recorded Investment | 22 | 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 | 1,276 | 818
Impaired Loans with No Allowance: Unpaid Principal Balance | 1,309 | 842
Impaired Loans: Total Recorded Investment | 1,549 | 1,141
Impaired Loans: Total Unpaid Principal Balance | 1,929 | 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 | 273 | 323
Impaired Loans with No Allowance: Unpaid Principal Balance | $ 620 | $ 568

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