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, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Beginning balance	$ 4,128,887	$ 4,187,424
Acquisitions		10,998
Dispositions	(6,934)
Foreign currency	2,606	(20,353)
Assets held for sale	(10,226)	(49,182)
Ending balance	4,114,333	4,128,887
Other
Goodwill [Roll Forward]
Beginning balance	81,831	81,831
Acquisitions		0
Dispositions	0
Foreign currency	0	0
Ending balance	81,831	81,831
Operating segments | iHM
Goodwill [Roll Forward]
Beginning balance	3,288,481	3,288,481
Acquisitions		0
Dispositions	0
Foreign currency	0	0
Ending balance	3,288,481	3,288,481
Operating segments | Americas Outdoor Advertising
Goodwill [Roll Forward]
Beginning balance	534,683	584,574
Acquisitions		0
Dispositions	(6,934)
Foreign currency	(1,393)	(709)
Assets held for sale	(10,226)	(49,182)
Ending balance	516,130	534,683
Operating segments | International Outdoor Advertising
Goodwill [Roll Forward]
Beginning balance	223,892	232,538
Acquisitions		10,998
Dispositions	0
Foreign currency	3,999	(19,644)
Ending balance	$ 227,891	$ 223,892