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Loan Quality and Allowance for Loan Losses (Impaired Financing Receivables) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment With No Allowance | $ 13,059 |  | $ 13,059 |  | $ 11,926
Unpaid Principal Balance With No Allowance | 14,184 |  | 14,184 |  | 22,109
Average Recorded Investment | 13,503 | $ 16,074 | 13,982 | $ 17,710 |
Interest Income Recognized | 104 | 119 | 320 | 349 |
Residential Real Estate [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment With No Allowance | 395 |  | 395 |  | 920
Unpaid Principal Balance With No Allowance | 395 |  | 395 |  | 1,007
Average Recorded Investment | 396 | 1,359 | 399 | 1,649 |
Interest Income Recognized | 6 | 12 | 18 | 33 |
Residential Real Estate [Member] | First Liens [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment With No Allowance | 395 |  | 395 |  | 871
Unpaid Principal Balance With No Allowance | 395 |  | 395 |  | 958
Average Recorded Investment | 396 | 1,091 | 399 | 899 |
Interest Income Recognized | 6 | 10 | 18 | 31 |
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 |  | 268 |  | 750 |
Interest Income Recognized |  | 2 |  | 2 |
Residential Real Estate - Construction [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment With No Allowance | 525 |  | 525 |  | 455
Unpaid Principal Balance With No Allowance | 729 |  | 729 |  | 531
Average Recorded Investment | 646 | 461 | 650 | 463 |
Commercial Real Estate [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment With No Allowance | 12,139 |  | 12,139 |  | 10,236
Unpaid Principal Balance With No Allowance | 13,060 |  | 13,060 |  | 10,808
Average Recorded Investment | 12,461 | 10,789 | 12,933 | 10,314 |
Interest Income Recognized | $ 98 | 107 | $ 302 | 316 |
Commercial [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment With No Allowance |  |  |  |  | 315
Unpaid Principal Balance With No Allowance |  |  |  |  | $ 9,763
Average Recorded Investment |  | $ 3,465 |  | $ 5,284 |

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