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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Disaggregate revenue) (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Sep. 30, 2018 | Sep. 30, 2017
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 284,190 | $ 293,143
Higher Education [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 245,014 | 248,515
Test Preparation [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 23,105 | 25,124
Certifications [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 8,214 | 8,859
Conferences/Seminars [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 2,868 | 7,368
Memberships/Subscriptions [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 3,936 | 3,015
Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 1,053 | 262
Medical And Healthcare [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 202,100 | 191,285
Medical And Healthcare [Member] | Higher Education [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 201,173 | 191,285
Medical And Healthcare [Member] | Test Preparation [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Medical And Healthcare [Member] | Certifications [Member] |  |
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 | 927 | 0
Professional Education [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 35,646 | 40,042
Professional Education [Member] | Higher Education [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Professional Education [Member] | Test Preparation [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 20,502 | 20,538
Professional Education [Member] | Certifications [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 8,214 | 8,859
Professional Education [Member] | Conferences/Seminars [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 2,868 | 7,368
Professional Education [Member] | Memberships/Subscriptions [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 3,936 | 3,015
Professional Education [Member] | Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 126 | 262
Technology And Business [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 47,251 | 62,439
Technology And Business [Member] | Higher Education [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 43,841 | 57,230
Technology And Business [Member] | Test Preparation [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 3,410 | 5,209
Technology And Business [Member] | Certifications [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Technology And Business [Member] | Conferences/Seminars [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Technology And Business [Member] | Memberships/Subscriptions [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Technology And Business [Member] | Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Home Office And Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | (807) | (623)
Home Office And Other [Member] | Higher Education [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Home Office And Other [Member] | Test Preparation [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | (807) | (623)
Home Office And Other [Member] | Certifications [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
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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