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Share-Based Compensation - Textual (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options exercised during period     5,500  
Unrecognized compensation cost related to non-vested share-based compensation arrangements $ 120   $ 120  
Weighted average period to recognize unrecognized share-based compensation cost     2 years 1 month 5 days  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value     $ 1 $ 3
Nonvested and expected to vest     62,912  
Share-based compensation expense 62 $ 28 $ 123 54
2005 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     5 years  
Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Tax benefit of stock option compensation expense 8 $ 3 $ 9 $ 10
Restricted Common Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation cost related to non-vested share-based compensation arrangements 646   $ 646  
Granted (in shares)     9,268  
Weighted average remaining period     4 years 30 days  
Intrinsic value $ 765   $ 765  
Restricted Common Stock [Member] | Annual Vesting [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting percent     20.00%