Property, Plant And Equipment, Intangible Assets And Goodwill (Schedule Of Definite-Lived Intangible Assets) (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 2,960,680	$ 2,968,148
Accumulated Amortization	(2,061,562)	(2,014,488)
Transit, street furniture and other outdoor contractual rights [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	631,943	635,772
Accumulated Amortization	(458,829)	(457,060)
Customer/advertiser relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,222,518	1,222,518
Accumulated Amortization	(921,759)	(891,488)
Talent contracts [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	319,384	319,384
Accumulated Amortization	(259,674)	(252,526)
Representation contracts [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	239,142	239,142
Accumulated Amortization	(220,109)	(217,770)
Permanent easements [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	157,314	156,349
Accumulated Amortization	0	0
Other [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	390,379	394,983
Accumulated Amortization	$ (201,191)	$ (195,644)