PROPERTY, PLANT AND EQUIPMENT, INTANGIBLE ASSETS AND GOODWILL - Schedule Of Property, Plant And Equipment (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 4,413,978	$ 4,436,096
Less: accumulated depreciation	2,375,124	2,223,540
Property, plant and equipment, net	2,038,854	2,212,556
Land, buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	595,511	603,234
Structures
Property, Plant and Equipment [Line Items]
Property, plant and equipment	2,755,221	2,824,794
Towers, transmitters and studio equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	349,260	347,877
Furniture and other equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	618,302	591,149
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 95,684	$ 69,042