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STOCKHOLDERS' DEFICIT (Details)
 12 Months Ended
Jun. 30, 2018
USD ($)
$ / shares
shares
Oct. 31, 2017
USD ($)
Jun. 30, 2017
$ / shares
shares
Class of Stock [Line Items]      
Authorized share repurchase program $ 200,000,000.0    
Shares repurchases $ 200,129,000    
Class A Common Stock      
Class of Stock [Line Items]      
Common stock issued (shares) | shares 57,530,733   51,943,281
Common stock, par value (in dollars per share) | $ / shares $ 0.01   $ 0.01
Common stock, number of votes per share held 1    
Authorized share repurchase program   $ 200,000,000.0  
Shares repurchased (in shares) | shares 6,400,000    
Average share repurchase price (in usd per share) | $ / shares $ 31.16    
Shares repurchases $ 200,000,000    
Class B Common Stock      
Class of Stock [Line Items]      
Common stock issued (shares) | shares 80,335,701   87,298,888
Common stock, par value (in dollars per share) | $ / shares $ 0.000001   $ 0.000001
Common stock, number of votes per share held 1