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Investments (Amortized Cost and Fair Values Classified by Contractual Maturity Date) (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Schedule of Investments [Line Items] |  |
Amortized Cost: Due in one year or less | $ 227 |
Amortized Cost: Due after one year through five years | 16,768 |
Amortized Cost: Due after five years through ten years | 21,799 |
Amortized Cost: Due after ten years | 29,366 |
Amortized Cost: Sub Total | 68,160 |
Fair Value: Due in one year or less | 228 |
Fair Value: Due after one year through five years | 16,614 |
Fair Value: Due after five years through ten years | 21,388 |
Fair Value: Due after ten years | 26,303 |
Available For Sale Debt Maturities Fair Value Sub Total | 64,533 |
Available-for-sale Securities, Amortized Cost Basis | 141,865 | $ 144,123
Available-for-sale Securities | 136,514 | 137,641
Amortized Cost: Due after one year through five years, Held to maturity | 8,363 |
Amortized Cost: Due after five years through ten years, Held to maturity | 7,691 |
Amortized Cost: Due after ten years, Held to maturity | 14,674 |
Amortized Cost: Total, Held to maturity | 30,728 |
Fair Value: Due after one year through five years, Held to maturity | 8,556 |
Fair Value: Due after five years through ten years, Held to maturity | 7,899 |
Fair Value: Due after ten years, Held to maturity | 16,600 |
Fair Value: Total, Held to maturity | 33,055 |
Held-to-maturity securities | 95,538 | 94,010
Held-to-maturity securities, fair value | 97,364 | 93,760
Residential mortgage-backed agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Held-to-maturity securities | 45,312 | 46,491
Held-to-maturity securities, fair value | 44,660 | 45,210
Commercial mortgage-backed agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 38,141 | 39,013
Available-for-sale Securities | 36,976 | 37,752
Held-to-maturity securities | 15,745 | 15,821
Held-to-maturity securities, fair value | 15,958 | 15,828
Collateralized mortgage obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 35,564 | 36,669
Available-for-sale Securities | 35,005 | 35,704
Held-to-maturity securities | 3,753 | 3,761
Held-to-maturity securities, fair value | $ 3,691 | $ 3,605

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