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Investment Securities (Details) - USD ($) $ in Thousands | Sep. 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 | $ 142,426 | $ 129,550
Investment securities available for sale, Gross Unrealized Gains | 339 | 960
Investment securities available for sale, Gross Unrealized Losses | (4,012) | (1,372)
Available for Sale, Fair Value, Total | 138,753 | 129,138
Investment securities held to maturity, Cost Basis | 38,673 | 38,752
Investment securities held to maturity, Gross Unrealized Gains | 100 | 390
Investment securities held to maturity, Gross Unrealized Losses | (1,428) | (331)
Held to Maturity, Fair Value, Total | 37,345 | 38,811
U.S. Agency [Member] |  |
Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |
Investment securities available for sale, Cost Basis | 6,731 | 6,612
Investment securities available for sale, Gross Unrealized Gains | 0 | 0
Investment securities available for sale, Gross Unrealized Losses | (308) | (40)
Available for Sale, Fair Value, Total | 6,423 | 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 | 87,075 | 79,854
Investment securities available for sale, Gross Unrealized Gains | 232 | 611
Investment securities available for sale, Gross Unrealized Losses | (2,308) | (719)
Available for Sale, Fair Value, Total | 84,999 | 79,746
Investment securities held to maturity, Cost Basis | 8,294 | 9,740
Investment securities held to maturity, Gross Unrealized Gains | 65 | 149
Investment securities held to maturity, Gross Unrealized Losses | (256) | (45)
Held to Maturity, Fair Value, Total | 8,103 | 9,844
Municipal [Member] |  |
Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |
Investment securities available for sale, Cost Basis | 11,240 | 7,198
Investment securities available for sale, Gross Unrealized Gains | 15 | 27
Investment securities available for sale, Gross Unrealized Losses | (489) | (189)
Available for Sale, Fair Value, Total | 10,766 | 7,036
Investment securities held to maturity, Cost Basis | 24,341 | 22,970
Investment securities held to maturity, Gross Unrealized Gains | 25 | 203
Investment securities held to maturity, Gross Unrealized Losses | (956) | (238)
Held to Maturity, Fair Value, Total | 23,410 | 22,935
Corporate bonds [Member] |  |
Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |
Investment securities available for sale, Cost Basis | 37,380 | 35,886
Investment securities available for sale, Gross Unrealized Gains | 92 | 322
Investment securities available for sale, Gross Unrealized Losses | (907) | (424)
Available for Sale, Fair Value, Total | 36,565 | 35,784
Corporate bonds and other securities [Member] |  |
Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |
Investment securities held to maturity, Cost Basis | 6,038 | 6,042
Investment securities held to maturity, Gross Unrealized Gains | 10 | 38
Investment securities held to maturity, Gross Unrealized Losses | (216) | (48)
Held to Maturity, Fair Value, Total | $ 5,832 | $ 6,032

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