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Fair Values of Financial Instruments (Narrative) (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Transfers between fair value hierarchy | $ 0 | $ 0 |
Impaired loans | 6,996,000 |  | $ 7,265,000
Valuation allowance | 3,232,000 |  | 3,264,000
Significant Unobservable Inputs (Level 3) [Member] | Impaired Loans [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Impaired loans | 7,000,000.0 |  | 3,200,000
Valuation allowance | $ 7,300,000 |  | $ 3,300,000

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