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Loan Quality (Impaired Financing Receivables) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Allowance | $ 11,551 | $ 12,176
Unpaid Principal Balance With No Allowance | 12,473 | 13,484
Recorded Investment With Allowance | 5,702 |
Unpaid Principal Balance With Allowance | 5,702 |
Related Allowance | 228 |
Average Recorded Investment | 15,005 | 14,606
Interest Income Recognized | 430 | 436
Residential Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Allowance | 637 | 659
Unpaid Principal Balance With No Allowance | 637 | 659
Average Recorded Investment | 648 | 668
Interest Income Recognized | 40 | 39
Residential Real Estate [Member] | First Liens [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Allowance | 637 | 659
Unpaid Principal Balance With No Allowance | 637 | 659
Average Recorded Investment | 648 | 668
Interest Income Recognized | 40 | 39
Residential Real Estate - Construction [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Allowance | 512 | 523
Unpaid Principal Balance With No Allowance | 729 | 729
Average Recorded Investment | 518 | 619
Commercial Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Allowance | 10,402 | 10,994
Unpaid Principal Balance With No Allowance | 11,107 | 12,096
Recorded Investment With Allowance | 5,702 |
Unpaid Principal Balance With Allowance | 5,702 |
Related Allowance | 228 |
Average Recorded Investment | 13,839 | 13,319
Interest Income Recognized | $ 390 | $ 397

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