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Stock-Based Compensation - Additional Disclosures (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Aug. 18, 2010
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense   $ 1,242 $ 559 $ 2,725 $ 1,807
Number of shares that may be issued under plan   1,644,875   1,644,875  
Award expiration period       10 years  
Unearned stock-based compensation expense not yet recognized, recognition period       1 year 5 months 1 day  
Minimum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period       1 year  
Maximum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period       3 years  
Equity Based Incentive Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award value on date of grant $ 1,900        
Award vesting period 4 years        
Stock-based compensation expense   $ 0 $ 0 $ 0 $ 317
Stock Options and Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unearned stock-based compensation expense not yet recognized   $ 4,400   $ 4,400