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Investments (Amortized Cost and Fair Values Classified by Contractual Maturity Date) (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
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Schedule of Investments [Line Items] |  |
Amortized Cost: Due after one year through five years | $ 4,434 |
Amortized Cost: Due after five years through ten years | 24,821 |
Amortized Cost: Due after ten years | 65,371 |
Available for sale debt maturities amortized cost sub Total | 94,626 |
Fair Value: Due after one year through five years | 4,555 |
Fair Value: Due after five years through ten years | 25,745 |
Fair Value: Due after ten years | 59,920 |
Available for sale debt maturities fair value sub total | 90,220 |
Available-for-sale Securities, Amortized Cost Basis | 156,455 | $ 135,008
Available-for-sale Securities | 153,161 | 131,305
Amortized Cost: Due after ten years, Held to maturity | 20,759 |
Fair Value: Due after ten years, Held to maturity | 26,038 |
Held-to-maturity Securities | 69,221 | 93,979
Held-to-maturity securities, fair value | 76,370 | 100,656
Residential mortgage-backed agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 13,037 | 4,917
Available-for-sale Securities | 13,163 | 4,900
Held-to-maturity Securities | 34,868 | 42,939
Held-to-maturity securities, fair value | 36,025 | 43,253
Commercial mortgage-backed agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 33,566 | 27,634
Available-for-sale Securities | 34,160 | 27,764
Held-to-maturity Securities | 11,773 | 15,521
Held-to-maturity securities, fair value | 12,388 | 15,865
Collateralized mortgage obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 15,226 | 29,903
Available-for-sale Securities | 15,618 | 29,923
Held-to-maturity Securities | 1,821 | 3,140
Held-to-maturity securities, fair value | $ 1,919 | $ 3,143

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