INTANGIBLE ASSETS (Changes in Carrying Amount of Goodwill, by Segment) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Goodwill [Line Items]
Goodwill beginning balance	$ 588,007	$ 552,329	$ 533,179	$ 519,879
Purchase Accounting Adjustment	(4,481)		4,575
Acquisitions	274,672		116,007	55,915
Impairments			(98,784)
Foreign currency exchange rate changes	(4,010)	(19,150)	33,030	(23,465)
Goodwill ending balance	854,188	533,179	588,007	552,329
Medical And Healthcare [Member]
Goodwill [Line Items]
Goodwill beginning balance	495,927	495,927	495,927	495,927
Purchase Accounting Adjustment	0		0
Acquisitions	0		0	0
Impairments			0
Foreign currency exchange rate changes	0	0	0	0
Goodwill ending balance	495,927	495,927	495,927	495,927
Accumulated Impairment Losses beginning balance	(185,717)	(86,933)	(86,933)	(86,933)
Purchase Accounting Adjustment	0		0
Acquisitions	0		0	0
Impairments			(98,784)
Foreign currency exchange rate changes	0	0	0	0
Accumulated Impairment Losses ending balance	(185,717)	(86,933)	(185,717)	(86,933)
International And Professional Education [Member]
Goodwill [Line Items]
Goodwill beginning balance	255,601	121,139	101,989	88,689
Purchase Accounting Adjustment	(4,481)		4,575
Acquisitions	274,672		116,007	55,915
Impairments			0
Foreign currency exchange rate changes	(4,010)	(19,150)	33,030	(23,465)
Goodwill ending balance	521,782	101,989	255,601	121,139
Business Technology And Management [Member]
Goodwill [Line Items]
Goodwill beginning balance	22,196	22,196	22,196	22,196
Purchase Accounting Adjustment	0		0
Acquisitions	0		0	0
Impairments			0
Foreign currency exchange rate changes	0	0	0	0
Goodwill ending balance	$ 22,196	$ 22,196	$ 22,196	$ 22,196