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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

X

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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