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Debt - Additional Information (Details) - USD ($)
6 Months Ended
Mar. 26, 2015
Mar. 11, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Debt Instrument [Line Items]          
Unamortized debt discount     $ 1,285,000   $ 1,527,000
Debt amendment costs recorded as unamortized debt discount     634,000   $ 751,000
Loss on early extinguishment of debt     136,000 $ 94,000  
2013 Senior Secured Credit Facility First amendment          
Debt Instrument [Line Items]          
Debt amendment costs recorded as unamortized debt discount     555,000    
Debt amendment costs     1,086,000    
Debt Instrument, expense incurred     531,000    
Term loan | 2013 Senior Secured Credit Facility          
Debt Instrument [Line Items]          
Credit facility, borrowing capacity     230,000,000    
Loss on early extinguishment of debt     136,000 94,000  
Excess cash flow payment $ 12,727,000     $ 7,320,000  
Mandatory principal payments     487,000    
Revolving loan facility | 2013 Senior Secured Credit Facility          
Debt Instrument [Line Items]          
Credit facility, borrowing capacity     10,000,000    
Borrowings drawn during the period     0    
Available borrowings under the facility     $ 10,000,000    
Revolving loan facility commitment fee on average daily amount of unused portion     0.50%    
LIBOR loans | 2013 Senior Secured Credit Facility | London Interbank Offered Rate (LIBOR)          
Debt Instrument [Line Items]          
Variable interest rate floor     1.00%    
LIBOR loans | 2013 Senior Secured Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum          
Debt Instrument [Line Items]          
Basis spread on variable rate   3.25%      
LIBOR loans | 2013 Senior Secured Credit Facility First amendment          
Debt Instrument [Line Items]          
Increase to the maximum applicable margin   0.25%      
ABR loans | 2013 Senior Secured Credit Facility | Alternative Base Rate          
Debt Instrument [Line Items]          
Variable interest rate floor     2.00%    
ABR loans | 2013 Senior Secured Credit Facility | Federal Funds Effective Rate          
Debt Instrument [Line Items]          
Basis spread on variable rate   0.50%      
ABR loans | 2013 Senior Secured Credit Facility | Eurodollar rate          
Debt Instrument [Line Items]          
Basis spread on variable rate   1.00%      
ABR loans | 2013 Senior Secured Credit Facility | Eurodollar rate | Maximum          
Debt Instrument [Line Items]          
Basis spread on variable rate   2.25%