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DEBT - Additional Information (Detail) - USD ($)
 1 Months Ended 12 Months Ended
Apr. 13, 2018
Mar. 31, 2015
Jun. 30, 2018
Jun. 30, 2017
Line of Credit Facility [Line Items]        
Letters of Credit Outstanding, Amount     $ 68,400,000 $ 68,500,000
Line Of Credit Facility Unused Capacity Commitment Fee Percentage     0.40%  
Letter of Credit Annual Fee Percentage     2.25%  
Line of Credit Facility, Initiation Date Apr. 13, 2018 Mar. 31, 2015    
Debt, Weighted Average Interest Rate       3.18%
Line of Credit Facility, Remaining Borrowing Capacity     $ 231,600,000  
Long-term Debt     293,073,000 $ 125,000,000
Line of Credit Facility, Increase (Decrease), Net $ 250,000,000      
Debt Issuance Costs, Gross $ 9,900,000      
Debt Issuance Costs Write-off     $ 1,400,000  
Term B Loan [Member]        
Line of Credit Facility [Line Items]        
Debt, Weighted Average Interest Rate     5.08%  
Debt Instrument, Maturity Date Apr. 13, 2025      
Debt Instrument, Face Amount $ 300,000,000      
Debt Instrument, Periodic Payment, Principal 750,000      
Debt Issuance Costs, Gross $ 7,100,000      
Debt Issuance Costs Amortization Period 7 years      
Eurocurrency Rate [Member] | Term B Loan [Member]        
Line of Credit Facility [Line Items]        
Debt Instrument, Description of Variable Rate Basis     LIBOR-equivalent rate plus 3%  
Debt Instrument, Basis Spread on Variable Rate     3.00%  
Base Rate [Member] | Term B Loan [Member]        
Line of Credit Facility [Line Items]        
Debt Instrument, Description of Variable Rate Basis     base rate plus 2%  
Debt Instrument, Basis Spread on Variable Rate     2.00%  
Revolving Credit Facility [Member]        
Line of Credit Facility [Line Items]        
Line of Credit Facility, Maximum Borrowing Capacity $ 300,000,000 $ 400,000,000    
Line of Credit Facility, Expiration Date Apr. 13, 2023 Mar. 31, 2020    
Foreign Currency Borrowing Capacity $ 200,000,000      
Long-term Debt       125,000,000
Debt Issuance Costs, Gross $ 2,700,000      
Debt Issuance Costs Amortization Period 5 years      
Revolving Credit Facility [Member] | Minimum [Member]        
Line of Credit Facility [Line Items]        
Line of Credit Facility, Interest Rate During Period     1.75%  
Revolving Credit Facility [Member] | Maximum [Member]        
Line of Credit Facility [Line Items]        
Line of Credit Facility, Interest Rate During Period     2.75%  
Revolving Credit Facility [Member] | Prime Rate [Member] | Minimum [Member]        
Line of Credit Facility [Line Items]        
Line of Credit Facility, Interest Rate During Period     0.75%  
Revolving Credit Facility [Member] | Prime Rate [Member] | Maximum [Member]        
Line of Credit Facility [Line Items]        
Line of Credit Facility, Interest Rate During Period     1.75%  
Letter of Credit [Member]        
Line of Credit Facility [Line Items]        
Line of Credit Facility, Maximum Borrowing Capacity $ 100,000,000 $ 100,000,000    
Letter Of Credit Title IV Disbursement, Amount       $ 68,400,000