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INCOME TAXES - Schedule of Income Loss Before Income Tax Expense (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Income Tax Disclosure [Abstract]      
Domestic $ 279,360 $ 231,982 $ 207,641
Foreign 19,304 16,637 15,971
Income before income taxes $ 298,664 $ 248,619 $ 223,612