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Loan Quality and Allowance for Loan Losses (Impaired Financing Receivables) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Allowance | $ 12,176 | $ 11,926
Unpaid Principal Balance With No Allowance | 13,484 | 22,109
Average Recorded Investment | 14,606 | 16,599
Interest Income Recognized | 436 | 463
Residential Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Allowance | 659 | 920
Unpaid Principal Balance With No Allowance | 659 | 1,007
Average Recorded Investment | 668 | 999
Interest Income Recognized | 39 | 46
Residential Real Estate [Member] | First Liens [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Allowance | 659 | 871
Unpaid Principal Balance With No Allowance | 659 | 958
Average Recorded Investment | 668 | 914
Interest Income Recognized | 39 | 45
Residential Real Estate [Member] | Junior Liens & Lines Of Credit [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Allowance |  | 49
Unpaid Principal Balance With No Allowance |  | 49
Average Recorded Investment |  | 85
Interest Income Recognized |  | 1
Residential Real Estate - Construction [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Allowance | 523 | 455
Unpaid Principal Balance With No Allowance | 729 | 531
Average Recorded Investment | 619 | 462
Commercial Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Allowance | 10,994 | 10,236
Unpaid Principal Balance With No Allowance | 12,096 | 10,808
Average Recorded Investment | 13,319 | 10,809
Interest Income Recognized | $ 397 | 417
Commercial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment With No Allowance |  | 315
Unpaid Principal Balance With No Allowance |  | 9,763
Average Recorded Investment |  | $ 4,329

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