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Investment Securities (Unrealized Gain (Loss) on Investments) (Details) - USD ($) | Jun. 30, 2018 | Dec. 31, 2017
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Schedule of Investments [Line Items] |  |
Available-for-sale debt securities, Amortized Cost | $ 117,211,000 | $ 95,648,000
Available-for-sale debt securities, Unrealized Gains | 5,000 | 14,000
Available-for-sale debt securities, Unrealized Losses | 5,525,000 | 2,703,000
Available for sale debt securities, Fair Value | 111,691,000 | 92,959,000
Held-to-maturity debt securities, Amortized Cost | 153,321,000 | 101,356,000
Held-to-maturity debt securities, Unrealized Gains | 61,000 | 41,000
Held-to-maturity debt securities, Unrealized Losses | 3,366,000 | 914,000
Held-to-maturity debt securities, Fair Value | 150,016,000 | 100,483,000
Available-for-sale securities and Held-to-maturity debt securities, Amortized Cost | 270,532,000 | 197,554,000
Available-for-sale securities and Held-to-maturity debt securities, Unrealized Gains | 66,000 | 55,000
Available-for-sale securities and Held-to-maturity debt securities, Unrealized Losses | 8,891,000 | 3,661,000
Available-for-sale securities and Held-to-maturity debt securities, Fair Value | 261,707,000 | 193,948,000
Available-for-sale equity securities, Amortized Cost |  | 550,000
Available-for-sale equity securities, Unrealized Losses |  | 44,000
Available for sale equity securities, Fair Value | 492,000 | 506,000
U.S. Treasury and U.S. government agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale debt securities, Amortized Cost | 40,597,000 | 40,125,000
Available-for-sale debt securities, Unrealized Losses | 2,257,000 | 1,395,000
Available for sale debt securities, Fair Value | 38,340,000 | 38,730,000
Held-to-maturity debt securities, Amortized Cost | 10,985,000 | 10,984,000
Held-to-maturity debt securities, Unrealized Losses | 201,000 | 90,000
Held-to-maturity debt securities, Fair Value | 10,784,000 | 10,894,000
Mortgage-backed U.S. Government Agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale debt securities, Amortized Cost | 43,713,000 | 26,398,000
Available-for-sale debt securities, Unrealized Gains | 1,000 | 2,000
Available-for-sale debt securities, Unrealized Losses | 1,288,000 | 569,000
Available for sale debt securities, Fair Value | 42,426,000 | 25,831,000
Held-to-maturity debt securities, Amortized Cost | 66,512,000 | 53,472,000
Held-to-maturity debt securities, Unrealized Gains | 4,000 |
Held-to-maturity debt securities, Unrealized Losses | 1,649,000 | 523,000
Held-to-maturity debt securities, Fair Value | 64,867,000 | 52,949,000
State and political subdivision obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale debt securities, Amortized Cost | 31,551,000 | 27,775,000
Available-for-sale debt securities, Unrealized Gains | 3,000 | 7,000
Available-for-sale debt securities, Unrealized Losses | 1,980,000 | 739,000
Available for sale debt securities, Fair Value | 29,574,000 | 27,043,000
Held-to-maturity debt securities, Amortized Cost | 75,824,000 | 36,900,000
Held-to-maturity debt securities, Unrealized Gains | 57,000 | 41,000
Held-to-maturity debt securities, Unrealized Losses | 1,516,000 | 301,000
Held-to-maturity debt securities, Fair Value | 74,365,000 | 36,640,000
Corporate debt securities [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale debt securities, Amortized Cost | 1,350,000 | 1,350,000
Available-for-sale debt securities, Unrealized Gains | 1,000 | 5,000
Available for sale debt securities, Fair Value | 1,351,000 | 1,355,000
Equity Securities [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale equity securities, Amortized Cost |  | 550,000
Available-for-sale equity securities, Unrealized Losses |  | 44,000
Available for sale equity securities, Fair Value | $ 492,000 | $ 506,000

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