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Revenues (Disaggregate revenue) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 266,172 | $ 253,961 | $ 520,785 | $ 490,900
Higher Education [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 214,153 | 211,487 | 415,606 | 412,660
Test Preparation/Certifications |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 26,938 | 26,491 | 51,909 | 54,400
Conferences Seminars [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 13,742 | 10,676 | 30,814 | 13,544
Memberships Subscriptions [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 5,055 | 3,900 | 9,922 | 7,836
Other [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 6,284 | 1,407 | 12,534 | 2,460
Medical and Healthcare [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 220,180 | 212,627 | 427,667 | 414,727
Medical and Healthcare [Member] | Higher Education [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 214,153 | 211,487 | 415,606 | 412,660
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 | 6,027 | 1,140 | 12,061 | 2,067
Financial Services [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 45,992 | 42,142 | 93,118 | 77,788
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 | 26,938 | 27,299 | 51,909 | 56,015
Financial Services [Member] | Conferences Seminars [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 13,742 | 10,676 | 30,814 | 13,544
Financial Services [Member] | Memberships Subscriptions [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 5,055 | 3,900 | 9,922 | 7,836
Financial Services [Member] | Other [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 257 | 267 | 473 | 393
Home Office And Other [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues |  | (808) | $ 0 | (1,615)
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 |  | (808) |  | (1,615)
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

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