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PROPERTY, PLANT AND EQUIPMENT, INTANGIBLE ASSETS AND GOODWILL - Schedule Of Changes In Carrying Amount Of Goodwill (Detail) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Dec. 31, 2017
Goodwill |  |
Beginning balance | $ 4,051,082 | $ 4,066,575
Impairment |  | (1,591)
Acquisitions |  | 4,694
Foreign currency | (5,566) | 18,847
Ending balance | 4,043,910 | 4,051,082
iHM |  |
Goodwill |  |
Beginning balance | 3,255,208 | 3,288,481
Impairment |  | 0
Acquisitions |  | 2,442
Foreign currency | 0 | 0
Ending balance | 3,253,602 | 3,255,208
Americas Outdoor |  |
Goodwill |  |
Beginning balance | 507,819 | 505,478
Impairment |  | 0
Acquisitions |  | 2,252
Foreign currency | 0 | 0
Ending balance | 507,819 | 507,819
International Outdoor |  |
Goodwill |  |
Beginning balance | 206,224 | 190,785
Impairment |  | (1,591)
Acquisitions |  | 0
Foreign currency | (5,566) | 18,847
Ending balance | 200,658 | 206,224
Other |  |
Goodwill |  |
Beginning balance | 81,831 | 81,831
Impairment |  | 0
Acquisitions |  | 0
Foreign currency | 0 | 0
Ending balance | 81,831 | 81,831
Dispositions |  |
Goodwill |  |
Dispositions and assets held for sale | (1,606) | (37,532)
Dispositions | iHM |  |
Goodwill |  |
Dispositions and assets held for sale | (1,606) | (35,715)
Dispositions | Americas Outdoor |  |
Goodwill |  |
Dispositions and assets held for sale | 0 | 0
Dispositions | International Outdoor |  |
Goodwill |  |
Dispositions and assets held for sale | 0 | (1,817)
Dispositions | Other |  |
Goodwill |  |
Dispositions and assets held for sale | $ 0 | 0
Assets held for sale |  |
Goodwill |  |
Dispositions and assets held for sale |  | (89)
Assets held for sale | iHM |  |
Goodwill |  |
Dispositions and assets held for sale |  | 0
Assets held for sale | Americas Outdoor |  |
Goodwill |  |
Dispositions and assets held for sale |  | (89)
Assets held for sale | International Outdoor |  |
Goodwill |  |
Dispositions and assets held for sale |  | 0
Assets held for sale | Other |  |
Goodwill |  |
Dispositions and assets held for sale |  | $ 0

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