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Investment Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
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Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |
Investment securities available for sale, Cost Basis | $ 138,609 | $ 129,550
Investment securities available for sale, Gross Unrealized Gains | 497 | 960
Investment securities available for sale, Gross Unrealized Losses | (3,251) | (1,372)
Available for Sale, Fair Value, Total | 135,855 | 129,138
Investment securities held to maturity, Cost Basis | 38,916 | 38,752
Investment securities held to maturity, Gross Unrealized Gains | 142 | 390
Investment securities held to maturity, Gross Unrealized Losses | (952) | (331)
Held to Maturity, Fair Value, Total | 38,106 | 38,811
U.S. Agency [Member] |  |
Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |
Investment securities available for sale, Cost Basis | 6,768 | 6,612
Investment securities available for sale, Gross Unrealized Gains | 0 | 0
Investment securities available for sale, Gross Unrealized Losses | (238) | (40)
Available for Sale, Fair Value, Total | 6,530 | 6,572
U.S. Agency mortgage-backed securities [Member] |  |
Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |
Investment securities available for sale, Cost Basis | 84,185 | 79,854
Investment securities available for sale, Gross Unrealized Gains | 313 | 611
Investment securities available for sale, Gross Unrealized Losses | (1,861) | (719)
Available for Sale, Fair Value, Total | 82,637 | 79,746
Investment securities held to maturity, Cost Basis | 8,524 | 9,740
Investment securities held to maturity, Gross Unrealized Gains | 79 | 149
Investment securities held to maturity, Gross Unrealized Losses | (192) | (45)
Held to Maturity, Fair Value, Total | 8,411 | 9,844
Municipal [Member] |  |
Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |
Investment securities available for sale, Cost Basis | 10,755 | 7,198
Investment securities available for sale, Gross Unrealized Gains | 29 | 27
Investment securities available for sale, Gross Unrealized Losses | (392) | (189)
Available for Sale, Fair Value, Total | 10,392 | 7,036
Investment securities held to maturity, Cost Basis | 24,352 | 22,970
Investment securities held to maturity, Gross Unrealized Gains | 50 | 203
Investment securities held to maturity, Gross Unrealized Losses | (679) | (238)
Held to Maturity, Fair Value, Total | 23,723 | 22,935
Corporate bonds [Member] |  |
Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |
Investment securities available for sale, Cost Basis | 36,901 | 35,886
Investment securities available for sale, Gross Unrealized Gains | 155 | 322
Investment securities available for sale, Gross Unrealized Losses | (760) | (424)
Available for Sale, Fair Value, Total | 36,296 | 35,784
Corporate bonds and other securities [Member] |  |
Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |
Investment securities held to maturity, Cost Basis | 6,040 | 6,042
Investment securities held to maturity, Gross Unrealized Gains | 13 | 38
Investment securities held to maturity, Gross Unrealized Losses | (81) | (48)
Held to Maturity, Fair Value, Total | $ 5,972 | $ 6,032

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