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Securities (Details 1) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Contractual Maturities Of Available For Sale Debt Securities [Line Items]    
Estimated Fair Value, Due in one year or less $ 3,215  
Estimated Fair Value, Due from one to five years 22,207  
Estimated Fair Value, Due from five to ten years 31,896  
Estimated Fair Value, Due over ten years 69,949  
Estimated Fair Value, Total $ 240,050 $ 233,350
Tax-Equivalent Yield, Due in one year or less 6.53%  
Tax-Equivalent Yield, Due from one to five years 2.88%  
Tax-Equivalent Yield, Due from five to ten years 4.46%  
Tax-Equivalent Yield, Due over ten years 4.46%  
Tax-Equivalent Yield, Total 3.39%  
Collateralized mortgage obligations and residential mortgage-backed securities [Member]    
Contractual Maturities Of Available For Sale Debt Securities [Line Items]    
Estimated Fair Value, Total $ 112,783 $ 119,173
Tax-Equivalent Yield, Total 2.44%