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Security Types (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value | $ 3,047 | $ 5,000
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value | 25,983 | 27,972
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value | 46,274 | 45,068
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value | 168,268 | 163,647
Available-for-sale Securities, Fair Value, Total | 243,572 | 241,687
Available For Sale Securities, Gross Unrealized Gains | 2,391 | 4,374
Available For Sale Securities, Gross Unrealized Losses | 3,512 | 1,305
Available-for-sale Securities, Amortized Cost Basis | 244,693 | 238,618
US Government and Government Agencies and Authorities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value | 3,047 | 5,000
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value | 22,531 | 25,852
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value | 19,893 | 19,463
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value | 0 | 9,770
Available-for-sale Securities, Fair Value, Total | 45,471 | 60,085
Available For Sale Securities, Gross Unrealized Gains | 331 | 384
Available For Sale Securities, Gross Unrealized Losses | 973 | 518
Available-for-sale Securities, Amortized Cost Basis | 46,113 | 60,219
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value | 0 | 0
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value | 972 | 1,623
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value | 16,171 | 13,511
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value | 110,644 | 95,820
Available-for-sale Securities, Fair Value, Total | 127,787 | 110,954
Available For Sale Securities, Gross Unrealized Gains | 551 | 968
Available For Sale Securities, Gross Unrealized Losses | 1,805 | 780
Available-for-sale Securities, Amortized Cost Basis | 129,041 | 110,766
US States and Political Subdivisions Debt Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value | 0 | 0
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value | 2,480 | 497
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value | 10,210 | 12,094
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value | 57,624 | 58,057
Available-for-sale Securities, Fair Value, Total | 70,314 | 70,648
Available For Sale Securities, Gross Unrealized Gains | 1,509 | 3,022
Available For Sale Securities, Gross Unrealized Losses | 734 | 7
Available-for-sale Securities, Amortized Cost Basis | $ 69,539 | $ 67,633

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