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Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Jun. 30, 2017
Debt Instrument [Line Items]    
Total debt $ 2,691,300 $ 2,597,120
Premium on Senior Notes 2026 6,164 6,597
Debt issuance costs (29,382) (33,900)
Total amount outstanding 2,668,082 2,569,817
Less:    
Current portion of long-term debt 282,760 182,760
Non-current portion of long-term debt 2,385,322 2,387,057
Term Loan B    
Debt Instrument [Line Items]    
Total debt 766,300 772,120
Less:    
Current portion of long-term debt 7,760 7,760
Senior Notes | Senior Notes 2026    
Debt Instrument [Line Items]    
Total debt 850,000 850,000
Senior Notes | Senior Notes 2023    
Debt Instrument [Line Items]    
Total debt 800,000 800,000
Line of Credit | Revolver    
Debt Instrument [Line Items]    
Total debt 275,000 175,000
Less:    
Current portion of long-term debt $ 275,000 $ 175,000