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Share-Based Compensation - Textual (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
May 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense $ 284 $ 238 $ 173  
Intrinsic value of options exercised 235 42 45  
Cash received from options exercised 231 60 55  
Excess tax benefit realized for option exercises 30 6 7  
Unrecognized compensation cost related to non-vested share-based compensation arrangements $ 32      
Weighted average period to recognize unrecognized share-based compensation cost 8 months 12 days      
Total fair value of options vested in period $ 15   91  
Number of options nonvested and expected to vest (shares) 93,501      
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Tax benefit of stock option compensation expense $ 44 $ 14 12  
Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period   5 years    
Share-based compensation expense 235 $ 161 $ 82  
Unrecognized compensation cost related to non-vested share-based compensation arrangements $ 1,035      
Options granted (in shares) 54,650 9,268 57,330  
Granted (in dollars per share) $ 14.10 $ 10.79 $ 12.68  
Equity instruments other than options weighted average remaining period 3 years 8 months 25 days      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested $ 1,866      
2005 Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options granted (in shares) 0 0 0  
2005 Plan | Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award expiration period   10 years    
Award vesting period   5 years    
2015 Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares reserved for issuance       829,200
Number of shares authorized under plan       875,000
2015 Plan | Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award expiration period   10 years    
Award vesting period   5 years