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Loan Quality and Allowance for Loan Losses (Impaired Financing Receivables) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment With No Allowance | $ 11,926 | $ 12,583 |
Unpaid Principal Balance With No Allowance | 22,109 | 13,223 |
Average Recorded Investment | 16,599 | 13,803 | $ 19,617
Interest Income Recognized | 463 | 474 | 632
Residential Real Estate [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment With No Allowance | 920 | 869 |
Unpaid Principal Balance With No Allowance | 1,007 | 950 |
Average Recorded Investment | 999 | 1,147 | 1,287
Interest Income Recognized | 46 | 39 | 39
Residential Real Estate [Member] | First Liens [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment With No Allowance | 871 | 869 |
Unpaid Principal Balance With No Allowance | 958 | 950 |
Average Recorded Investment | 914 | 1,083 | 1,194
Interest Income Recognized | 45 | 39 | 38
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 | 64 | 93
Interest Income Recognized | 1 |  | 1
Residential Real Estate - Construction [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment With No Allowance | 455 | 466 |
Unpaid Principal Balance With No Allowance | 531 | 531 |
Average Recorded Investment | 462 | 473 | 492
Interest Income Recognized |  |  | 4
Commercial Real Estate [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment With No Allowance | 10,236 | 11,061 |
Unpaid Principal Balance With No Allowance | 10,808 | 11,541 |
Average Recorded Investment | 10,809 | 11,938 | 17,806
Interest Income Recognized | 417 | 435 | 589
Commercial [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment With No Allowance | 315 | 187 |
Unpaid Principal Balance With No Allowance | 9,763 | 201 |
Average Recorded Investment | $ 4,329 | $ 245 | $ 32

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