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INTANGIBLE ASSETS (Summary of Goodwill Balances by Reporting Segment) (Detail) - USD ($)
$ in Thousands
Mar. 31, 2017
Jun. 30, 2016
Mar. 31, 2016
Goodwill [Line Items]      
Goodwill $ 861,001 $ 588,007 $ 565,012
Medical And Healthcare [Member]      
Goodwill [Line Items]      
Goodwill 310,210 310,210 310,210
Professional Education [Member]      
Goodwill [Line Items]      
Goodwill 306,444 32,043 32,386
Technology and Business [Member]      
Goodwill [Line Items]      
Goodwill 222,151 223,558 194,409
U.S. Traditional Postsecondary [Member]      
Goodwill [Line Items]      
Goodwill $ 22,196 $ 22,196 $ 28,007