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OTHER INFORMATION - Barter and Trade (Narrative) (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Nonmonetary Transaction [Line Items]        
Barter and trade revenues $ 30,200,000 $ 30,400,000 $ 105,700,000 $ 88,100,000
Barter and trade expenses 22,500,000 $ 30,600,000 80,000,000 $ 84,900,000
Advertising exchanged for equity interests        
Nonmonetary Transaction [Line Items]        
Barter and trade revenues 5,400,000   22,100,000  
Barter and trade expenses $ 0   $ 0