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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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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PROPERTY, PLANT AND EQUIPMENT, INTANGIBLE ASSETS AND GOODWILL - Schedule Of Changes In Carrying Amount Of Goodwill (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Beginning balance		$ 4,128,887	$ 4,187,424
Acquisitions			10,998
Impairment			(7,274)
Foreign currency		4,608	(20,353)
Ending balance	$ 4,108,950	4,108,950	4,128,887
International Outdoor Advertising
Goodwill [Roll Forward]
Impairment	(7,300)	(7,300)
Other
Goodwill [Roll Forward]
Beginning balance		81,831	81,831
Acquisitions			0
Impairment			0
Foreign currency		0	0
Ending balance	81,831	81,831	81,831
Operating segments \| iHM
Goodwill [Roll Forward]
Beginning balance		3,288,481	3,288,481
Acquisitions			0
Impairment			0
Foreign currency		0	0
Ending balance	3,288,481	3,288,481	3,288,481
Operating segments \| Americas Outdoor Advertising
Goodwill [Roll Forward]
Beginning balance		534,683	584,574
Acquisitions			0
Impairment			0
Foreign currency		(1,805)	(709)
Ending balance	515,607	515,607	534,683
Operating segments \| International Outdoor Advertising
Goodwill [Roll Forward]
Beginning balance		223,892	232,538
Acquisitions			10,998
Impairment			(7,274)
Foreign currency		6,413	(19,644)
Ending balance	$ 223,031	223,031	223,892
Assets held for sale
Goodwill [Roll Forward]
Dispositions and assets held for sale		(10,337)	(49,182)
Assets held for sale \| Other
Goodwill [Roll Forward]
Dispositions and assets held for sale		0	0
Assets held for sale \| Operating segments \| iHM
Goodwill [Roll Forward]
Dispositions and assets held for sale		0	0
Assets held for sale \| Operating segments \| Americas Outdoor Advertising
Goodwill [Roll Forward]
Dispositions and assets held for sale		(10,337)	(49,182)
Assets held for sale \| Operating segments \| International Outdoor Advertising
Goodwill [Roll Forward]
Dispositions and assets held for sale		0	$ 0
Dispositions
Goodwill [Roll Forward]
Dispositions and assets held for sale		(6,934)
Dispositions \| Other
Goodwill [Roll Forward]
Dispositions and assets held for sale		0
Dispositions \| Operating segments \| iHM
Goodwill [Roll Forward]
Dispositions and assets held for sale		0
Dispositions \| Operating segments \| Americas Outdoor Advertising
Goodwill [Roll Forward]
Dispositions and assets held for sale		(6,934)
Dispositions \| Operating segments \| International Outdoor Advertising
Goodwill [Roll Forward]
Dispositions and assets held for sale		$ 0