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Investment Securities (Unrealized Gain (Loss) on Investments) (Details) - USD ($) | Sep. 30, 2017 | Dec. 31, 2016
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Schedule of Investments [Line Items] |  |
Available-for-sale securities, Amortized Cost | $ 98,164,000 | $ 138,048,000
Available-for-sale securities, Unrealized Gains | 53,000 | 142,000
Available-for-sale securities, Unrealized Losses | 1,704,000 | 4,565,000
Available for sale Securities, Fair Value | 96,513,000 | 133,625,000
Held-to-maturity securities, Amortized Cost | 82,625,000 | 0
Held-to-maturity securities, Unrealized Gains | 241,000 |
Held-to-maturity securities, Unrealized Losses | 150,000 |
Held-to-maturity securities, Fair Value | 82,716,000 | 0
Available-for-sale securities and Held-to-maturity securities, Amortized Cost | 180,789,000 |
Available-for-sale securities and Held-to-maturity securities, Unrealized Gains | 294,000 |
Available-for-sale securities and Held-to-maturity securities, Unrealized Losses | 1,854,000 |
Available-for-sale securities and Held-to-maturity securities, Fair Value | 179,229,000 |
U.S. Treasury and U.S. government agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale securities, Amortized Cost | 40,133,000 | 48,520,000
Available-for-sale securities, Unrealized Gains |  | 34,000
Available-for-sale securities, Unrealized Losses | 880,000 | 1,542,000
Available for sale Securities, Fair Value | 39,253,000 | 47,012,000
Held-to-maturity securities, Amortized Cost | 10,984,000 |
Held-to-maturity securities, Unrealized Gains | 21,000 |
Held-to-maturity securities, Unrealized Losses | 7,000 |
Held-to-maturity securities, Fair Value | 10,998,000 |
Mortgage-backed U.S. Government Agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale securities, Amortized Cost | 27,370,000 | 26,181,000
Available-for-sale securities, Unrealized Gains | 11,000 | 17,000
Available-for-sale securities, Unrealized Losses | 335,000 | 579,000
Available for sale Securities, Fair Value | 27,046,000 | 25,619,000
Held-to-maturity securities, Amortized Cost | 51,326,000 |
Held-to-maturity securities, Unrealized Gains | 96,000 |
Held-to-maturity securities, Unrealized Losses | 102,000 |
Held-to-maturity securities, Fair Value | 51,320,000 |
State and political subdivision obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale securities, Amortized Cost | 28,393,000 | 61,079,000
Available-for-sale securities, Unrealized Gains | 35,000 | 91,000
Available-for-sale securities, Unrealized Losses | 450,000 | 2,332,000
Available for sale Securities, Fair Value | 27,978,000 | 58,838,000
Held-to-maturity securities, Amortized Cost | 20,315,000 |
Held-to-maturity securities, Unrealized Gains | 124,000 |
Held-to-maturity securities, Unrealized Losses | 41,000 |
Held-to-maturity securities, Fair Value | 20,398,000 |
Corporate debt securities [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale securities, Amortized Cost | 1,000,000 | 1,100,000
Available-for-sale securities, Unrealized Gains | 5,000 |
Available for sale Securities, Fair Value | 1,005,000 | 1,100,000
Equity Securities [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale securities, Amortized Cost | 1,268,000 | 1,168,000
Available-for-sale securities, Unrealized Gains | 2,000 |
Available-for-sale securities, Unrealized Losses | 39,000 | 112,000
Available for sale Securities, Fair Value | $ 1,231,000 | $ 1,056,000

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