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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Disaggregate revenue) (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 254,613 | $ 236,939
Higher Education [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 201,453 | 201,173
Test Preparation/Certifications |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 24,972 | 27,909
Conferences Seminars [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 17,070 | 2,868
Memberships Subscriptions [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 4,867 | 3,936
Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 6,251 | 1,053
Medical and Healthcare [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 207,487 | 202,100
Medical and Healthcare [Member] | Higher Education [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 201,453 | 201,173
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 | 6,034 | 927
Financial Services |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 47,126 | 35,646
Financial Services | Higher Education [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Financial Services | Test Preparation/Certifications |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 24,972 | 28,716
Financial Services | Conferences Seminars [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 17,070 | 2,868
Financial Services | Memberships Subscriptions [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 4,867 | 3,936
Financial Services | Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 217 | 126
Home Office And Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | (807)
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 | 0 | (807)
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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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(1)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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