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Revenue (Disaggregate revenue) (Detail) - USD ($) $ in Thousands | 3 Months Ended
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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

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