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Long-Term Debt - Additional Information (Detail) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2015
Jun. 30, 2013
Mar. 31, 2016
Jun. 30, 2015
Dec. 31, 2015
Aug. 30, 2012
Debt Instrument [Line Items]            
Credit facility, maximum borrowing capacity           $ 925,000
Term loan amounts outstanding, gross   $ 671,625        
Unmodified portion of Term Loan   553,589        
Extinguishment of outstanding term loan   118,036   $ 663,188    
Increase in outstanding term loan   121,410        
Acceleration amortization of debt issuance cost       $ 10,050    
Margin over LIBOR     1.50% 1.50% 1.50%  
Term loan amounts outstanding     $ 766,686   $ 776,466  
Debt amortization expense     3,314   $ 3,534  
Principal amount of term loan     $ 10,000      
Credit facility, frequency of payments     Quarterly      
Maturity date of term loan agreement     Jun. 30, 2020      
New Credit Facility            
Debt Instrument [Line Items]            
Margin over LIBOR 1.50%          
Credit facility, base rate 0.50%     0.50%    
Revolving Credit Facility            
Debt Instrument [Line Items]            
Credit facility, maximum borrowing capacity     $ 350,000     $ 250,000
Acceleration amortization of debt issuance cost   54   $ 65    
Revolving Credit Facility | New Credit Facility            
Debt Instrument [Line Items]            
Credit facility, maximum borrowing capacity $ 350,000     350,000    
Term Loan Credit Facility            
Debt Instrument [Line Items]            
Credit facility, maximum borrowing capacity   675,000        
Term Loan Credit Facility | New Credit Facility            
Debt Instrument [Line Items]            
Credit facility, maximum borrowing capacity $ 800,000     $ 800,000    
Term Loans            
Debt Instrument [Line Items]            
Acceleration amortization of debt issuance cost   $ 3,103