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Loan Quality and Allowance for Loan Losses (Troubled Debt Restructuring Loans) (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 USD ($) contract | Dec. 31, 2018 USD ($) contract
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Number of Contracts | contract |  | 16 | 16
Troubled Debt Restructurings: Recorded Investment |  | $ 10,446 | $ 11,232
New During Period, Number of Contracts | contract |  | 0 |
Performing [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Recorded Investment | [1] | $ 10,446 | 9,487
Nonperforming [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Recorded Investment | [1] |  | $ 1,745
Residential Real Estate - Construction [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Number of Contracts | contract |  | 1 | 1
Troubled Debt Restructurings: Recorded Investment |  | $ 444 | $ 455
Residential Real Estate - Construction [Member] | Performing [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Recorded Investment | [1] | $ 444 |
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 | 4
Troubled Debt Restructurings: Recorded Investment |  | $ 659 | $ 678
Residential Real Estate [Member] | Performing [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Recorded Investment | [1] | $ 659 | $ 678
Commercial Real Estate [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Number of Contracts | contract |  | 11 | 11
Troubled Debt Restructurings: Recorded Investment |  | $ 9,343 | $ 10,099
Commercial Real Estate [Member] | Performing [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Recorded Investment | [1] | $ 9,343 | 8,809
Commercial Real Estate [Member] | Nonperforming [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Troubled Debt Restructurings: Recorded Investment | [1] |  | $ 1,290
[1] | The performing status is determined by the loan's compliance with the modified terms.

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