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Loans and Allowance for Loan Losses (Details 3) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]      
Risk rated loans $ 369,000 $ 349,304 $ 346,113
Nonaccrual past due loans 1,983 2,198  
Consumer [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Risk rated loans 21,596 20,090 20,752
Nonaccrual past due loans 6    
Consumer [Member] | Performing [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Risk rated loans 21,590 20,090  
Construction Real Estate [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Risk rated loans 6,153 5,390 2,691
Construction Real Estate [Member] | Performing [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Risk rated loans 6,153 5,390  
Residential Real Estate [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Risk rated loans 89,787 91,509 $ 93,703
Nonaccrual past due loans 791 431  
Residential Real Estate [Member] | Performing [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Risk rated loans 88,767 90,796  
Residential Real Estate [Member] | Nonperforming [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Risk rated loans $ 229 $ 282