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Loans and Allowance for Loan Losses (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2016
Jun. 30, 2016
Sep. 30, 2015
Jun. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Mar. 31, 2015
Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Provision for Loan and Lease Losses $ 150,000   $ 100,000   $ 500,000 $ (700,000)      
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans         43,000 121,000      
Impaired Financing Receivable, Recorded Investment, Total 6,077,000       6,077,000   $ 6,837,000    
Loans Receivable, Gross, Commercial, Agricultural               $ 44,000  
Proceeds from Loan Originations         2,400,000        
Allowance for loan losses 5,507,000 $ 5,652,000 5,936,000 $ 6,018,000 5,507,000 5,936,000 5,922,000   $ 5,320,000
Commercial Portfolio Segment [Member]                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Loan Restructuring, Trial Modifications, Amount   8,000   2,700,000          
Residential Portfolio Segment [Member]                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Loan Restructuring, Trial Modifications, Amount   188,000     56,000        
Agriculture Portfolio Segment [Member]                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Loans Receivable, Gross, Commercial, Agricultural 302,000       302,000        
Loan Restructuring, Trial Modifications, Amount         25,000        
Commercial Real Estate [Member]                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Provision for Loan and Lease Losses (40,000)   129,000   (4,000) (166,000)      
Impaired Financing Receivable, Recorded Investment, Total 2,517,000       2,517,000   2,429,000    
Allowance for loan losses 1,736,000 $ 1,776,000 1,668,000 $ 1,539,000 1,736,000 1,668,000 $ 1,740,000   $ 1,832,000
Trouble Debt Restructurings [Member]                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Impaired Financing Receivable Loan Balance Charged Off 215,000       215,000        
Loans Receivable, Gross, Commercial, Real Estate, Total     1,600,000     1,600,000      
Provision for Loan and Lease Losses 2,000       2,000        
Allowance for loan losses     1,700,000     1,700,000      
Construction Loans [Member]                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Allowance for loan losses 915,000   $ 4,300,000   915,000 $ 4,300,000      
Construction Loans [Member] | Trouble Debt Restructurings [Member]                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Loans and Leases Receivable, Impaired, Commitment to Lend $ 84,000       $ 84,000