Property, Plant And Equipment, Intangible Assets And Goodwill (Schedule Of Property, Plant And Equipment) (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Property Plant And Equipment [Line Items]
Property, plant and equipment	$ 4,411,698	$ 4,436,096
Less: accumulated depreciation	2,267,258	2,223,540
Property, plant and equipment, net	2,144,440	2,212,556
Land, buildings and improvements [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment	600,582	603,234
Structures [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment	2,799,699	2,824,794
Towers, transmitters and studio equipment [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment	345,240	347,877
Furniture and other equipment [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment	600,067	591,149
Construction in progress [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment	$ 66,110	$ 69,042