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Share Based Compensation - Narrative (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2016
Dec. 31, 2015
May 31, 2015
Apr. 24, 2007
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation cost $ 500      
Restricted stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares of restricted stock granted (in shares) 33,321 40,443    
Compensation cost charged against income $ 30 $ 500    
2003 Option Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Common stock reserved and available for issuance (in shares)       19,000
2003 Option Plan | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise period 7 years      
2003 Option Plan | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise period 10 years      
2015 Stock Compensation Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized (in shares)     430,000  
Number of shares available to grant (in shares) 356,236