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Fair Value (Details Textual)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
USD ($)
Property
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Fair value assets liabilities transfers amount between level 1 and level 2 $ 0 $ 0  
Impaired loans, unpaid principal balance with allowance recorded 2,710 4,014 $ 6,908
Impaired loans, allowance 249 497 874
Provision for loan losses 3,870 3,510 $ 1,880
Troubled debt restructurings $ 7,000 9,300  
Number of properties charged down reflecting updated appraisals | Property 3    
Other real estate owned measured at fair value less costs to sell $ 16    
Write down of other real estate owned $ 36 0  
Maximum maturity period of short term borrowings 90 days    
Measured Using Present Value of Cash Flows      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Troubled debt restructurings $ 2,000 2,900  
Collateral Dependent Impaired Loans      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Impaired loans, unpaid principal balance with allowance recorded 727 3,400  
Impaired loans, allowance 173 383  
Provision for loan losses $ 139 $ 270