SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Disaggregate revenue) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 308,609	$ 310,070	$ 909,393	$ 911,424
Higher Education [Member]
Disaggregation of Revenue [Line Items]
Revenues	263,981	273,870	779,875	795,727
Test Preparation [Member]
Disaggregation of Revenue [Line Items]
Revenues	22,074	24,347	67,625	70,432
Certifications [Member]
Disaggregation of Revenue [Line Items]
Revenues	8,029	5,432	23,527	21,259
Conferences/Seminars [Member]
Disaggregation of Revenue [Line Items]
Revenues	3,860	2,371	17,405	13,334
Memberships/Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenues	4,299	3,580	12,135	9,852
Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	6,366	470	8,826	820
Medical And Healthcare [Member]
Disaggregation of Revenue [Line Items]
Revenues	223,575	220,067	638,302	614,649
Medical And Healthcare [Member] | Higher Education [Member]
Disaggregation of Revenue [Line Items]
Revenues	217,423	220,067	630,083	614,649
Medical And Healthcare [Member] | Test Preparation [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Medical And Healthcare [Member] | Certifications [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Medical And Healthcare [Member] | Conferences/Seminars [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Medical And Healthcare [Member] | Memberships/Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Medical And Healthcare [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	6,152	0	8,219	0
Professional Education [Member]
Disaggregation of Revenue [Line Items]
Revenues	35,935	31,505	113,723	101,906
Professional Education [Member] | Higher Education [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Professional Education [Member] | Test Preparation [Member]
Disaggregation of Revenue [Line Items]
Revenues	19,533	19,652	60,049	56,641
Professional Education [Member] | Certifications [Member]
Disaggregation of Revenue [Line Items]
Revenues	8,029	5,432	23,527	21,259
Professional Education [Member] | Conferences/Seminars [Member]
Disaggregation of Revenue [Line Items]
Revenues	3,860	2,371	17,405	13,334
Professional Education [Member] | Memberships/Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenues	4,299	3,580	12,135	9,852
Professional Education [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	214	470	607	820
Technology And Business [Member]
Disaggregation of Revenue [Line Items]
Revenues	49,907	59,030	159,791	196,602
Technology And Business [Member] | Higher Education [Member]
Disaggregation of Revenue [Line Items]
Revenues	46,558	53,803	149,792	181,078
Technology And Business [Member] | Test Preparation [Member]
Disaggregation of Revenue [Line Items]
Revenues	3,349	5,227	9,999	15,524
Technology And Business [Member] | Certifications [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Technology And Business [Member] | Conferences/Seminars [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Technology And Business [Member] | Memberships/Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Technology And Business [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Home Office And Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	(808)	(532)	(2,423)	(1,733)
Home Office And Other [Member] | Higher Education [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Home Office And Other [Member] | Test Preparation [Member]
Disaggregation of Revenue [Line Items]
Revenues	(808)	(532)	(2,423)	(1,733)
Home Office And Other [Member] | Certifications [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Home Office And Other [Member] | Conferences/Seminars [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Home Office And Other [Member] | Memberships/Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Home Office And Other [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 0	$ 0	$ 0	$ 0