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Loan Quality and Allowance for Loan Losses (Impaired Financing Receivables) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment With No Allowance | $ 14,359 |  | $ 14,359 |  | $ 11,926
Unpaid Principal Balance With No Allowance | 15,068 |  | 15,068 |  | 22,109
Average Recorded Investment | 14,845 | $ 24,182 | 15,006 | $ 18,277 |
Interest Income Recognized | 114 | 115 | 226 | 231 |
Residential Real Estate [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment With No Allowance | 802 |  | 802 |  | 920
Unpaid Principal Balance With No Allowance | 802 |  | 802 |  | 1,007
Average Recorded Investment | 805 | 1,876 | 848 | 1,813 |
Interest Income Recognized | 12 | 15 | 22 | 32 |
Residential Real Estate [Member] | First Liens [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment With No Allowance | 776 |  | 776 |  | 871
Unpaid Principal Balance With No Allowance | 776 |  | 776 |  | 958
Average Recorded Investment | 779 | 831 | 813 | 818 |
Interest Income Recognized | 11 | 11 | 21 | 22 |
Residential Real Estate [Member] | Junior Liens & Lines Of Credit [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment With No Allowance | 26 |  | 26 |  | 49
Unpaid Principal Balance With No Allowance | 26 |  | 26 |  | 49
Average Recorded Investment | 26 | 1,045 | 35 | 995 |
Interest Income Recognized | 1 | 4 | 1 | 10 |
Residential Real Estate - Construction [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment With No Allowance | 647 |  | 647 |  | 455
Unpaid Principal Balance With No Allowance | 729 |  | 729 |  | 531
Average Recorded Investment | 651 | 463 | 652 | 465 |
Commercial Real Estate [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment With No Allowance | 12,765 |  | 12,765 |  | 10,236
Unpaid Principal Balance With No Allowance | 13,374 |  | 13,374 |  | 10,808
Average Recorded Investment | 13,242 | 10,008 | 13,368 | 10,072 |
Interest Income Recognized | 102 | 100 | 204 | 199 |
Commercial [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment With No Allowance | 145 |  | 145 |  | 315
Unpaid Principal Balance With No Allowance | 163 |  | 163 |  | $ 9,763
Average Recorded Investment | $ 147 | $ 11,835 | $ 138 | $ 5,927 |

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