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Fair Value of Assets and Liabilities (Details) - Available-For-Sale Securities [Member] - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
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 $ 13,031 $ 13,358
Mortgage-backed securities [Member]    
Summary of fair value measurements of assets measured at fair value on a recurring basis    
Assets, Fair value, Recurring 57,776 61,603
State and political subdivisions [Member]    
Summary of fair value measurements of assets measured at fair value on a recurring basis    
Assets, Fair value, Recurring 14,427 15,097
Equity securities [Member]    
Summary of fair value measurements of assets measured at fair value on a recurring basis    
Assets, Fair value, Recurring 70 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 659 623
Interest rate contracts - liabilities [Member]    
Summary of fair value measurements of assets measured at fair value on a recurring basis    
Assets, Fair value, Recurring (659) (623)
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
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 13,031 13,358
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 57,776 61,603
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 14,427 15,097
Level 2 [Member] | Equity securities [Member]    
Summary of fair value measurements of assets measured at fair value on a recurring basis    
Assets, Fair value, Recurring 70 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 659 623
Level 2 [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 (659) (623)
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
Level 3 [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