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INTANGIBLE ASSETS (Changes in Carrying Amount of Goodwill, by Segment) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Jun. 30, 2017
Goodwill [Line Items] |  |  |
Goodwill beginning balance | $ 851,282 | $ 588,007 | $ 854,188
Purchase Accounting Adjustments |  | (4,481) | 895
Acquisitions |  | 274,672 |
Foreign exchange rate changes | 9,583 | (4,010) | (3,801)
Goodwill ending balance | 860,865 | 854,188 | 851,282
Medical And Healthcare [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill beginning balance | 310,210 | 310,210 | 310,210
Purchase Accounting Adjustments |  | 0 | 0
Acquisitions |  | 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 | 32,043 | 306,642
Purchase Accounting Adjustments |  | 0 | 17
Acquisitions |  | 274,672 |
Foreign exchange rate changes | 123 | (73) | (6)
Goodwill ending balance | 306,776 | 306,642 | 306,653
Technology And Business [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill beginning balance | 212,223 | 223,558 | 215,140
Purchase Accounting Adjustments |  | (4,481) | 878
Acquisitions |  | 0 |
Foreign exchange rate changes | 9,460 | (3,937) | (3,795)
Goodwill ending balance | 221,683 | 215,140 | 212,223
U.S. Traditional Postsecondary [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill beginning balance | 207,913 | 207,913 | 207,913
Purchase Accounting Adjustments |  | 0 | 0
Acquisitions |  | 0 |
Foreign exchange rate changes | 0 | 0 | 0
Goodwill ending balance | 207,913 | 207,913 | 207,913
Accumulated Impairment Losses beginning balance | (185,717) | (185,717) | (185,717)
Purchase Accounting Adjustments |  | 0 | 0
Acquisitions |  | 0 |
Foreign exchange rate changes | 0 | 0 | 0
Accumulated Impairment Losses ending balance | $ (185,717) | $ (185,717) | $ (185,717)

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