Revenue (Disaggregate revenue) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 268,241	$ 254,613
Higher Education [Member]
Disaggregation of Revenue [Line Items]
Revenue	218,289	201,453
Test Preparation/Certifications [Member]
Disaggregation of Revenue [Line Items]
Revenue	27,276	24,972
Conferences/Seminars [Member]
Disaggregation of Revenue [Line Items]
Revenue	13,369	17,070
Memberships/Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenue	7,995	4,867
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,312	6,251
Medical and Healthcare [Member]
Disaggregation of Revenue [Line Items]
Revenue	218,826	207,487
Medical and Healthcare [Member] | Higher Education [Member]
Disaggregation of Revenue [Line Items]
Revenue	218,289	201,453
Medical and Healthcare [Member] | Test Preparation/Certifications [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0
Medical and Healthcare [Member] | Conferences/Seminars [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0
Medical and Healthcare [Member] | Memberships/Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0
Medical and Healthcare [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	537	6,034
Financial Services [Member]
Disaggregation of Revenue [Line Items]
Revenue	49,415	47,126
Financial Services [Member] | Higher Education [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0
Financial Services [Member] | Test Preparation/Certifications [Member]
Disaggregation of Revenue [Line Items]
Revenue	27,276	24,972
Financial Services [Member] | Conferences/Seminars [Member]
Disaggregation of Revenue [Line Items]
Revenue	13,369	17,070
Financial Services [Member] | Memberships/Subscriptions [Member]
Disaggregation of Revenue [Line Items]
Revenue	7,995	4,867
Financial Services [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 775	$ 217