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Share-Based Compensation Plan - Narrative (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2016
USD ($)
share_based_compensation_plan
shares
Jun. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
share_based_compensation_plan
shares
Jun. 30, 2015
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of plans | share_based_compensation_plan 1   1  
Share based compensation expense $ 256,000 $ 150,000 $ 445,000 $ 280,000
Options intrinsic value $ 61,000   $ 61,000  
2006 Equity Compensation Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized (in shares) | shares 430,000   430,000  
2006 Equity Compensation Plan [Member] | Restricted Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation expense related to nonvested restricted stock awards $ 2,100,000   $ 2,100,000  
Restricted stock nonvested outstanding, weighted average remaining contractual terms     2 years 9 months 3 days  
2006 Equity Compensation Plan [Member] | Employee Stock Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation expense related to nonvested restricted stock awards 0   $ 0  
Compensation expense $ 0 $ 0 $ 0 $ 0