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INTANGIBLE ASSETS (Changes in Carrying Amount of Goodwill, by Segment) (Detail) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Dec. 31, 2017 | Jun. 30, 2017 | Dec. 31, 2016
Goodwill [Line Items] |  |  |
Goodwill beginning balance | $ 829,086 | $ 832,642 | $ 565,811
Purchase Accounting Adjustments |  | (412) | (3,122)
Acquisitions | 4,121 |  | 274,620
Foreign exchange rate changes | (264) | (3,144) | (4,667)
Goodwill ending balance | 832,943 | 829,086 | 832,642
Medical And Healthcare [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill beginning balance | 310,210 | 310,210 | 310,210
Purchase Accounting Adjustments |  | 0 | 0
Acquisitions | 0 |  | 0
Foreign exchange rate changes | 0 | 0 | 0
Goodwill ending balance | 310,210 | 310,210 | 310,210
Professional Education [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill beginning balance | 306,653 | 306,382 | 32,043
Purchase Accounting Adjustments |  | 69 | 0
Acquisitions | 0 |  | 274,620
Foreign exchange rate changes | 155 | 202 | (281)
Goodwill ending balance | 306,808 | 306,653 | 306,382
Technology And Business [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill beginning balance | 212,223 | 216,050 | 223,558
Purchase Accounting Adjustments |  | (481) | (3,122)
Acquisitions | 4,121 |  | 0
Foreign exchange rate changes | (419) | (3,346) | (4,386)
Goodwill ending balance | 215,925 | 212,223 | 216,050
U.S. Traditional Postsecondary [Member] |  |  |
Goodwill [Line Items] |  |  |
Acquisitions |  |  | 0
Goodwill beginning balance | 185,717 | 185,717 | 185,717
Purchase Accounting Adjustments |  | 0 | 0
Acquisitions | 0 |  | 0
Impairments | 0 |  |
Foreign exchange rate changes | 0 | 0 | 0
Goodwill ending balance | 185,717 | 185,717 | 185,717
Accumulated Impairment Losses beginning balance | (185,717) | (185,717) | (185,717)
Purchase Accounting Adjustments |  | 0 | 0
Foreign exchange rate changes | 0 | 0 | 0
Accumulated Impairment Losses ending balance | $ (185,717) | $ (185,717) | $ (185,717)

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