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Long Term Debt (Term Loan B and Revolver) (Details) - USD ($)
12 Months Ended
Jan. 16, 2014
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2014
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 0.75%      
Interest expense   $ 25,900,000 $ 26,100,000 $ 11,900,000
Revolver        
Debt Instrument [Line Items]        
Credit agreement, maximum capacity   $ 300,000,000    
London Interbank Offered Rate (LIBOR) | Term Loan B        
Debt Instrument [Line Items]        
Interest addition to floating rate 2.50%