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Stock Based Compensation, Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Period options granted to date vest ratably     5 years  
Period options granted expires after date of grant     10 years  
Compensation expense relating to restricted stock     $ 69 $ 68
Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Aggregate intrinsic value for option outstanding $ 193 $ 149 193 149
Aggregate intrinsic value of options exercisable 193,000 140 193,000 140
Total expense related to options included in salaries and wages 0 2 1 4
Tax benefit from compensation expense 0 0 0 1
Restricted Stock Awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation expense relating to restricted stock 6 23 69 68
Tax benefit from compensation expense 2 $ 8 24 $ 23
Restricted stock compensation costs not yet recognized $ 90   $ 90  
Compensation costs not yet recognized, period for recognition     4 years 1 month  
Ownership Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized for issuance (in shares) 200,000   200,000  
2015 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized for issuance (in shares) 450,000   450,000