INTANGIBLE ASSETS (Summary of Goodwill Balances by Reporting Segment) (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2013
Intangible Assets [Line Items]
Goodwill	$ 565,012	$ 552,329	$ 561,406	$ 519,879	$ 508,937
Medical And Healthcare [Member]
Intangible Assets [Line Items]
Goodwill	316,021	495,927		495,927	495,927
International And Professional Education [Member]
Intangible Assets [Line Items]
Goodwill	226,795	121,139		88,689	77,747
Business Technology And Management [Member]
Intangible Assets [Line Items]
Goodwill	$ 22,196	$ 22,196		$ 22,196	$ 22,196