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Debt - Additional Information (Detail)
1 Months Ended 3 Months Ended 4 Months Ended 6 Months Ended 12 Months Ended
Aug. 30, 2013
USD ($)
May 31, 2014
Jun. 30, 2016
USD ($)
covenant
Jun. 30, 2015
USD ($)
Sep. 30, 2014
Apr. 30, 2014
Jun. 30, 2016
USD ($)
covenant
Jun. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Dec. 02, 2013
USD ($)
Debt Instrument [Line Items]                    
Pre payment of principal for the first lien credit agreement             $ 25,000,000 $ 20,000,000    
Long-term debt before unamortized discount     $ 271,988,000       271,988,000      
Interest paid     $ 2,900,000 $ 3,500,000     $ 5,900,000 7,000,000    
First Lien Credit Agreement                    
Debt Instrument [Line Items]                    
Number of covenants | covenant     1       1      
Debt covenant trigger, line of credit facility amount less letters of credit threshold     $ 12,500,000.0       $ 12,500,000.0      
First Lien Credit Agreement | Maximum                    
Debt Instrument [Line Items]                    
Leverage ratio (no greater than)             5.5      
Term Loan Facility | First Lien Credit Agreement                    
Debt Instrument [Line Items]                    
Debt principal amount $ 320,000,000                 $ 415,000,000.0
Debt issuance cost 15,300,000                  
Leverage ratio (less than)   4                
Pre payment of principal for the first lien credit agreement             $ 25,000,000 20,000,000    
Long-term debt before unamortized discount     $ 272,000,000       $ 272,000,000      
Effective interest rate     4.90%       4.90%      
Term Loan Facility | First Lien Credit Agreement | London Interbank Offered Rate (LIBOR)                    
Debt Instrument [Line Items]                    
Floor rate     1.00%       1.00%   1.00%  
Decrease in basis spread, percentage   0.50%                
Debt, variable interest rate   3.25%       3.75% 3.00%   3.00%  
Term Loan Facility | First Lien Credit Agreement | Moody's, B2 Rating | London Interbank Offered Rate (LIBOR)                    
Debt Instrument [Line Items]                    
Decrease in basis spread, percentage         0.25%          
Debt, variable interest rate         3.00%          
Term Loan Facility | Second Lien Credit Agreement                    
Debt Instrument [Line Items]                    
Debt principal amount 120,000,000                  
Line of Credit | First Lien Credit Agreement | Revolving Credit Facility                    
Debt Instrument [Line Items]                    
Proceeds from line of credit 25,000,000           $ 22,000,000 10,000,000    
Line of credit facility borrowing capacity $ 50,000,000                  
Outstanding amount     $ 0       0   $ 0  
Repayment amount             $ 22,000,000 $ 10,000,000    
Facility fee, basis points             0.50%      
Remaining outstanding     $ 47,900,000       $ 47,900,000      
Line of Credit | First Lien Credit Agreement | Revolving Credit Facility | London Interbank Offered Rate (LIBOR)                    
Debt Instrument [Line Items]                    
Floor rate     1.00%       1.00%      
Debt, variable interest rate             2.25%