INTANGIBLE ASSETS (Schedule of Intangible Assets) (Detail) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	$ 68,405	$ 69,502	$ 73,009
Amortizable Intangible Assets, Accumulated Amortization	(29,754)	(24,521)	(24,096)
Indefinite-lived Intangible Assets, Gross Carrying Amount	316,496	317,950	336,229
Student Relationships [Member]
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	7,952	8,193	9,601
Amortizable Intangible Assets, Accumulated Amortization	$ (7,401)	(6,972)	(7,831)
Amortizable Intangible Assets, Weighted Average Amortization Period	5 years
Customer Relationships [Member]
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	$ 42,900	42,900	42,900
Amortizable Intangible Assets, Accumulated Amortization	$ (13,071)	(9,598)	(8,430)
Amortizable Intangible Assets, Weighted Average Amortization Period	10 years
Non-compete Agreements [Member]
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount		700	700
Amortizable Intangible Assets, Accumulated Amortization		(700)	(691)
Curriculum/Software [Member]
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	$ 6,810	6,833	7,148
Amortizable Intangible Assets, Accumulated Amortization	$ (5,775)	(4,265)	(3,901)
Amortizable Intangible Assets, Weighted Average Amortization Period	4 years
Franchise Contracts [Member]
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	$ 8,947	9,064	10,621
Amortizable Intangible Assets, Accumulated Amortization	$ (2,071)	(1,720)	(1,868)
Amortizable Intangible Assets, Weighted Average Amortization Period	18 years
Proprietary Technology [Member]
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	$ 500	500	500
Amortizable Intangible Assets, Accumulated Amortization	$ (344)	(250)	(219)
Amortizable Intangible Assets, Weighted Average Amortization Period	4 years
Clinical Agreements [Member]
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	$ 331	336	393
Amortizable Intangible Assets, Accumulated Amortization	$ (127)	(112)	(125)
Amortizable Intangible Assets, Weighted Average Amortization Period	15 years
Trade Names [Member]
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	$ 965	976	1,146
Amortizable Intangible Assets, Accumulated Amortization	(965)	(904)	(1,031)
Indefinite-lived Intangible Assets, Gross Carrying Amount	$ 105,745	106,132	109,755
Amortizable Intangible Assets, Weighted Average Amortization Period	10 years
Ross Title IV Eligibility and Accreditations [Member]
Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Gross Carrying Amount	$ 14,100	14,100	14,100
Intellectual Property [Member]
Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Gross Carrying Amount	13,940	13,940	13,940
Chamberlain Title IV Eligibility and Accreditations [Member]
Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Gross Carrying Amount	1,200	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	100,000
Adtalem Brazil Accreditation [Member]
Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Gross Carrying Amount	$ 81,511	$ 82,578	$ 97,234