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Long-Term Debt - Additional Information (Details) - USD ($)
12 Months Ended
Jun. 30, 2017
May 05, 2017
Feb. 22, 2017
Jan. 16, 2014
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Feb. 01, 2017
Jan. 31, 2017
Debt Instrument [Line Items]                  
Proceeds from line of credit         $ 225,000,000 $ 0 $ 0    
Long-term debt $ 2,597,120,000       2,597,120,000 2,180,000,000      
Debt issuance costs $ 33,900,000       33,900,000 34,013,000      
Write off of unamortized debt issuance costs         833,000 0 2,919,000    
Revolver | Line of Credit                  
Debt Instrument [Line Items]                  
Credit agreement, maximum capacity               $ 450,000,000 $ 300,000,000
Interest expense         $ 2,600,000 0 0    
Interest rate reduction   0.50%              
Effective interest rate percentage 2.74%       2.74%        
Proceeds from line of credit         $ 225,000,000        
Repayments of lines of credit         50,000,000        
Long-term debt $ 175,000,000       175,000,000 0      
Debt issuance costs, revolver 1,500,000       1,500,000        
Term Loan B                  
Debt Instrument [Line Items]                  
Credit agreement, maximum capacity       $ 800,000,000          
Term loan period, years       7 years          
Term loan quarterly repayment as percentage of principal       0.25%          
Interest addition to floating rate     0.00% 0.75%          
Interest expense         24,800,000 25,900,000 26,100,000    
Long-term debt 772,120,000       772,120,000 780,000,000      
Debt issuance costs $ 800,000       800,000        
Write off of unamortized debt issuance costs         800,000        
Term Loan B | LIBOR                  
Debt Instrument [Line Items]                  
Interest addition to floating rate 2.00%   2.00% 2.50%          
Senior Notes 2026 | Senior Notes                  
Debt Instrument [Line Items]                  
Interest expense         43,100,000 2,900,000 $ 0    
Long-term debt $ 850,000,000       850,000,000 $ 600,000,000      
Debt issuance costs $ 3,700,000       $ 3,700,000        
Minimum | Revolver | Line of Credit | LIBOR                  
Debt Instrument [Line Items]                  
Interest addition to floating rate         1.25%        
Maximum | Revolver | Line of Credit | LIBOR                  
Debt Instrument [Line Items]                  
Interest addition to floating rate         1.75%