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Loan Quality and Allowance for Loan Losses (Troubled Debt Restructuring Loans) (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) contract | Dec. 31, 2017 USD ($) contract
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Number of Contracts | contract |  | 16 | 17
Troubled Debt Restructurings: Recorded Investment |  | $ 11,232 | $ 12,186
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Number of Contracts | contract |  |  | 2
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Recorded Investment |  |  | $ 634
New During Period, Number of Contracts | contract |  | 0 |
Performing [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Recorded Investment | [1] | $ 9,487 | 11,555
Nonperforming [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Recorded Investment | [1] | $ 1,745 | $ 631
Residential Real Estate - Construction [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Number of Contracts | contract |  | 1 | 1
Troubled Debt Restructurings: Recorded Investment |  | $ 455 | $ 466
Residential Real Estate - Construction [Member] | Performing [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Recorded Investment | [1] |  | $ 466
Residential Real Estate - Construction [Member] | Nonperforming [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Recorded Investment | [1] | $ 455 |
Residential Real Estate [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Number of Contracts | contract |  | 4 | 5
Troubled Debt Restructurings: Recorded Investment |  | $ 678 | $ 737
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Number of Contracts | contract |  |  | 1
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Recorded Investment |  |  | $ 39
Residential Real Estate [Member] | Performing [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Recorded Investment | [1] | $ 678 | 701
Residential Real Estate [Member] | Nonperforming [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Recorded Investment | [1] |  | $ 36
Commercial Real Estate [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Number of Contracts | contract |  | 11 | 11
Troubled Debt Restructurings: Recorded Investment |  | $ 10,099 | $ 10,983
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Number of Contracts | contract |  |  | 1
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Recorded Investment |  |  | $ 595
Commercial Real Estate [Member] | Performing [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Recorded Investment | [1] | 8,809 | 10,388
Commercial Real Estate [Member] | Nonperforming [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Recorded Investment | [1] | $ 1,290 | $ 595
[1] | The performing status is determined by the loan's compliance with the modified terms.

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