Revenue (Disaggregate revenue) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 280,654	$ 271,487	$ 832,006	$ 792,272
Higher Education [Member]
Disaggregation of Revenue [Line Items]
Revenue	229,422	222,019	681,855	637,625
Test Preparation/Certifications [Member]
Disaggregation of Revenue [Line Items]
Revenue	36,202	26,236	95,378	78,145
Conferences/Seminars [Member]
Disaggregation of Revenue [Line Items]
Revenue	4,596	11,925	26,143	42,738
Memberships/Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenue	7,910	5,590	23,703	15,512
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,524	5,717	4,927	18,252
Medical and Healthcare [Member]
Disaggregation of Revenue [Line Items]
Revenue	230,213	227,344	683,435	655,011
Medical and Healthcare [Member] | Higher Education [Member]
Disaggregation of Revenue [Line Items]
Revenue	229,422	222,019	681,855	637,625
Medical and Healthcare [Member] | Test Preparation/Certifications [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Medical and Healthcare [Member] | Conferences/Seminars [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Medical and Healthcare [Member] | Memberships/Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Medical and Healthcare [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	791	5,325	1,580	17,386
Financial Services [Member]
Disaggregation of Revenue [Line Items]
Revenue	50,441	44,143	148,571	137,261
Financial Services [Member] | Higher Education [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Financial Services [Member] | Test Preparation/Certifications [Member]
Disaggregation of Revenue [Line Items]
Revenue	36,202	26,236	95,378	78,145
Financial Services [Member] | Conferences/Seminars [Member]
Disaggregation of Revenue [Line Items]
Revenue	4,596	11,925	26,143	42,738
Financial Services [Member] | Memberships/Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenue	7,910	5,590	23,703	15,512
Financial Services [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 1,733	$ 392	$ 3,347	$ 866