INTANGIBLE ASSETS (Summary of Goodwill Balances by Reporting Unit) (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill	$ 832,943	$ 829,086	$ 832,642
Chamberlain [Member]
Goodwill [Line Items]
Goodwill	4,716	4,716	4,716
AUC [Member]
Goodwill [Line Items]
Goodwill	68,321	68,321	68,321
RUSM and RUSVM [Member]
Goodwill [Line Items]
Goodwill	237,173	237,173	237,173
Becker and ACAMS [Member]
Goodwill [Line Items]
Goodwill	306,808	306,653	306,382
Adtalem Brazil [Member]
Goodwill [Line Items]
Goodwill	$ 215,925	$ 212,223	$ 216,050