INTANGIBLE ASSETS (Schedule of Intangible Assets) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	$ 112,515	$ 69,502
Amortizable Intangible Assets, Accumulated Amortization	(31,487)	(24,521)
Indefinite-lived Intangible Assets, Gross Carrying Amount	337,069	317,950
Student Relationships [Member]
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	8,109	8,193
Amortizable Intangible Assets, Accumulated Amortization	$ (7,679)	(6,972)
Amortizable Intangible Assets, Weighted Average Amortization Period	5 years
Customer Relationships [Member]
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	$ 69,300	42,900
Amortizable Intangible Assets, Accumulated Amortization	$ (14,448)	(9,598)
Amortizable Intangible Assets, Weighted Average Amortization Period	10 years
Non-compete Agreements [Member]
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount		700
Amortizable Intangible Assets, Accumulated Amortization		(700)
Curriculum/Software [Member]
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	$ 18,445	6,833
Amortizable Intangible Assets, Accumulated Amortization	$ (6,500)	(4,265)
Amortizable Intangible Assets, Weighted Average Amortization Period	5 years
Franchise Contracts [Member]
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	$ 9,123	9,064
Amortizable Intangible Assets, Accumulated Amortization	$ (2,238)	(1,720)
Amortizable Intangible Assets, Weighted Average Amortization Period	18 years
Clinical Agreements [Member]
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	$ 338	336
Amortizable Intangible Assets, Accumulated Amortization	$ (135)	(112)
Amortizable Intangible Assets, Weighted Average Amortization Period	15 years
Course Delivery Technology
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	$ 7,200	500
Amortizable Intangible Assets, Accumulated Amortization	$ (487)	(250)
Amortizable Intangible Assets, Weighted Average Amortization Period	5 years
Trade Names [Member]
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount		976
Amortizable Intangible Assets, Accumulated Amortization		(904)
Indefinite-lived Intangible Assets, Gross Carrying Amount	$ 124,711	106,132
Chamberlain Title IV Eligibility And Accreditations [Member]
Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Gross Carrying Amount	1,200	1,200
AUC Title IV Eligibility And Accreditations [Member]
Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Gross Carrying Amount	100,000	100,000
Ross Title IV Eligibility And Accreditations [Member]
Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Gross Carrying Amount	14,100	14,100
Adtalem Brazil Accreditation [Member]
Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Gross Carrying Amount	83,118	82,578
Intellectual Property [Member]
Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Gross Carrying Amount	$ 13,940	$ 13,940