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LONG TERM DEBT (Detail Textual) - USD ($)
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Debt Instrument [Line Items]    
Outstanding amount under Credit Facility $ 1,073,394,000 $ 1,243,867,000
Interest Rate Swap | Cash Flow Hedging    
Debt Instrument [Line Items]    
Aggregate notional amount 800,000,000  
Bank Credit Facility    
Debt Instrument [Line Items]    
Credit facility maximum borrowing capacity $ 2,038,400,000  
Credit facility borrowing capacity, description At any time and so long as no default has occurred, the Company has the right to increase the Revolving Facility or the Term Loan in an aggregate principal amount of up to the greater of $400.0 million or an amount subject to 2.75 times senior secured leverage, calculated assuming the Revolving Facility is fully drawn, with applicable lender approvals.  
Credit Facility optional increases to borrowing capacity $ 400,000,000  
Ratio that restricts optional increases to borrowing capacity 275.00%  
Outstanding borrowings interest rate 3.31%  
Revolving Credit Facility    
Debt Instrument [Line Items]    
Credit facility maximum borrowing capacity $ 1,100,000,000  
Outstanding amount under Credit Facility 135,000,000 265,000,000
Term loans    
Debt Instrument [Line Items]    
Outstanding amount under Credit Facility $ 938,394,000 $ 978,867,000
Term loan period 5 years  
Loan maturity date Jun. 30, 2023  
Term loan frequency of payment quarterly  
Term loans | Principal Payment Through June 30, 2021    
Debt Instrument [Line Items]    
Term loan principal payment $ 11,700,000  
Term loans | Principal Payment Thereafter June 30, 2021    
Debt Instrument [Line Items]    
Term loan principal payment 23,500,000  
Same-Day Swing Line Loan Revolving Credit Sub-Facility    
Debt Instrument [Line Items]    
Credit facility maximum borrowing capacity 100,000,000  
Outstanding amount under Credit Facility 0  
Stand-By Letters Of Credit Revolving Credit Sub Facility    
Debt Instrument [Line Items]    
Credit facility maximum borrowing capacity $ 25,000,000