Revenues (Disaggregate revenue) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 271,487	$ 258,703	$ 792,272	$ 749,603
Higher Education [Member]
Disaggregation of Revenue [Line Items]
Revenues	222,019	217,423	637,625	630,083
Test Preparation/Certifications
Disaggregation of Revenue [Line Items]
Revenues	26,236	26,755	78,145	81,154
Conferences Seminars [Member]
Disaggregation of Revenue [Line Items]
Revenues	11,925	3,860	42,738	17,405
Memberships Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenues	5,590	4,299	15,512	12,135
Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	5,717	6,366	18,252	8,826
Medical and Healthcare [Member]
Disaggregation of Revenue [Line Items]
Revenues	227,344	223,575	655,011	638,302
Medical and Healthcare [Member] | Higher Education [Member]
Disaggregation of Revenue [Line Items]
Revenues	222,019	217,423	637,625	630,083
Medical and Healthcare [Member] | Test Preparation/Certifications
Disaggregation of Revenue [Line Items]
Revenues		0		0
Medical and Healthcare [Member] | Conferences Seminars [Member]
Disaggregation of Revenue [Line Items]
Revenues		0		0
Medical and Healthcare [Member] | Memberships Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenues		0		0
Medical and Healthcare [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	5,325	6,152	17,386	8,219
Financial Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	44,143	35,935	137,261	113,723
Financial Services [Member] | Higher Education [Member]
Disaggregation of Revenue [Line Items]
Revenues		0		0
Financial Services [Member] | Test Preparation/Certifications
Disaggregation of Revenue [Line Items]
Revenues	26,236	27,562	78,145	83,576
Financial Services [Member] | Conferences Seminars [Member]
Disaggregation of Revenue [Line Items]
Revenues	11,925	3,860	42,738	17,405
Financial Services [Member] | Memberships Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenues	5,590	4,299	15,512	12,135
Financial Services [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 392	214	866	607
Home Office And Other [Member]
Disaggregation of Revenue [Line Items]
Revenues		(807)	$ 0	(2,422)
Home Office And Other [Member] | Higher Education [Member]
Disaggregation of Revenue [Line Items]
Revenues		0		0
Home Office And Other [Member] | Test Preparation/Certifications
Disaggregation of Revenue [Line Items]
Revenues		(807)		(2,422)
Home Office And Other [Member] | Conferences Seminars [Member]
Disaggregation of Revenue [Line Items]
Revenues		0		0
Home Office And Other [Member] | Memberships Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenues		0		0
Home Office And Other [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenues		$ 0		$ 0