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PROPERTY, PLANT AND EQUIPMENT, INTANGIBLE ASSETS AND GOODWILL - Schedule Of Changes In Carrying Amount Of Goodwill (Detail) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Goodwill |  |  |  |  |
Beginning balance |  |  | $ 4,051,082,000 | $ 4,066,575,000 | $ 4,066,575,000
Impairment | $ 0 |  | 0 |  | (1,591,000)
Acquisitions |  |  |  |  | 4,694,000
Foreign currency |  |  | (5,535,000) |  | 18,847,000
Ending balance | 4,043,941,000 |  | 4,043,941,000 |  | 4,051,082,000
iHM |  |  |  |  |
Goodwill |  |  |  |  |
Beginning balance |  |  | 3,255,208,000 | 3,288,481,000 | 3,288,481,000
Impairment |  |  |  |  | 0
Acquisitions |  |  |  |  | 2,442,000
Foreign currency |  |  | 0 |  | 0
Ending balance | 3,253,602,000 |  | 3,253,602,000 |  | 3,255,208,000
Americas Outdoor |  |  |  |  |
Goodwill |  |  |  |  |
Beginning balance |  |  | 507,819,000 | 505,478,000 | 505,478,000
Impairment |  |  |  |  | 0
Acquisitions |  |  |  |  | 2,252,000
Foreign currency |  |  | 0 |  | 0
Ending balance | 507,819,000 |  | 507,819,000 |  | 507,819,000
International Outdoor |  |  |  |  |
Goodwill |  |  |  |  |
Beginning balance |  |  | 206,224,000 | 190,785,000 | 190,785,000
Impairment |  | $ (1,600,000) |  | (1,600,000) | (1,591,000)
Acquisitions |  |  |  |  | 0
Foreign currency |  |  | (5,535,000) |  | 18,847,000
Ending balance | 200,689,000 |  | 200,689,000 |  | 206,224,000
Other |  |  |  |  |
Goodwill |  |  |  |  |
Beginning balance |  |  | 81,831,000 | $ 81,831,000 | 81,831,000
Impairment |  |  |  |  | 0
Acquisitions |  |  |  |  | 0
Foreign currency |  |  | 0 |  | 0
Ending balance | $ 81,831,000 |  | 81,831,000 |  | 81,831,000
Dispositions |  |  |  |  |
Goodwill |  |  |  |  |
Dispositions |  |  | (1,606,000) |  | (37,532,000)
Dispositions | iHM |  |  |  |  |
Goodwill |  |  |  |  |
Dispositions |  |  | (1,606,000) |  | (35,715,000)
Dispositions | Americas Outdoor |  |  |  |  |
Goodwill |  |  |  |  |
Dispositions |  |  | 0 |  | 0
Dispositions | International Outdoor |  |  |  |  |
Goodwill |  |  |  |  |
Dispositions |  |  | 0 |  | (1,817,000)
Dispositions | Other |  |  |  |  |
Goodwill |  |  |  |  |
Dispositions |  |  | $ 0 |  | 0
Assets held for sale |  |  |  |  |
Goodwill |  |  |  |  |
Assets held for sale |  |  |  |  | 89,000
Assets held for sale | iHM |  |  |  |  |
Goodwill |  |  |  |  |
Assets held for sale |  |  |  |  | 0
Assets held for sale | Americas Outdoor |  |  |  |  |
Goodwill |  |  |  |  |
Assets held for sale |  |  |  |  | 89,000
Assets held for sale | International Outdoor |  |  |  |  |
Goodwill |  |  |  |  |
Assets held for sale |  |  |  |  | 0
Assets held for sale | Other |  |  |  |  |
Goodwill |  |  |  |  |
Assets held for sale |  |  |  |  | $ 0

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