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Fair Value of Assets and Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
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U.S. Treasury and Government Agencies [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring | $ 11,576 | $ 12,708
Mortgage-backed securities [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring | 61,470 | 56,762
State and political subdivisions [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring | 11,068 | 13,250
Equity securities [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring |  | 70
Interest rate contracts - assets [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring | 1,455 | 698
Interest rate contracts - liabilities [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Liabilities, Fair Value, Recurring | (1,455) | (698)
Level 1 [Member] | U.S. Treasury and Government Agencies [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring |  |
Level 1 [Member] | Mortgage-backed securities [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring |  |
Level 1 [Member] | State and political subdivisions [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring |  |
Level 1 [Member] | Equity securities [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring |  |
Level 1 [Member] | Interest rate contracts - assets [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring |  |
Level 1 [Member] | Interest rate contracts - liabilities [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring |  |
Liabilities, Fair Value, Recurring |  |
Level 2 [Member] | U.S. Treasury and Government Agencies [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring | 11,576 | 12,708
Level 2 [Member] | Mortgage-backed securities [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring | 61,470 | 56,762
Level 2 [Member] | State and political subdivisions [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring | 11,068 | 13,250
Level 2 [Member] | Equity securities [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Liabilities, Fair Value, Recurring |  | (70)
Level 2 [Member] | Interest rate contracts - assets [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring | 1,455 | 698
Level 2 [Member] | Interest rate contracts - liabilities [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Liabilities, Fair Value, Recurring | (1,415) | (698)
Level 3 [Member] | U.S. Treasury and Government Agencies [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring |  |
Level 3 [Member] | Mortgage-backed securities [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring |  |
Level 3 [Member] | State and political subdivisions [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring |  |
Level 3 [Member] | Equity securities [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring |  |
Level 3 [Member] | Interest rate contracts - assets [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Assets, Fair value, Recurring |  |
Liabilities, Fair Value, Recurring |  |
Level 3 [Member] | Interest rate contracts - liabilities [Member] |  |
Summary of fair value measurements of assets measured at fair value on a recurring basis |  |
Liabilities, Fair Value, Recurring |  |

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