PROPERTY, PLANT AND EQUIPMENT, INTANGIBLE ASSETS AND GOODWILL - Schedule Of Definite-Lived Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 2,932,564	$ 2,968,148
Accumulated Amortization	(2,133,822)	(2,014,488)
Transit, street furniture and other outdoor contractual rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	589,703	635,772
Accumulated Amortization	(438,087)	(457,060)
Customer / advertiser relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,222,518	1,222,518
Accumulated Amortization	(982,173)	(891,488)
Talent contracts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	319,384	319,384
Accumulated Amortization	(273,946)	(252,526)
Representation contracts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	253,719	239,142
Accumulated Amortization	(226,539)	(217,770)
Permanent easements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	157,347	156,349
Accumulated Amortization	0	0
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	389,893	394,983
Accumulated Amortization	$ (213,077)	$ (195,644)