OTHER INFORMATION (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Other Income and Expenses [Abstract]
Change in deferred income tax liabilities	$ 0	$ 100,000	$ 0	$ (700,000)
Segment Reporting Information [Line Items]
Trade and barter revenues	49,100,000	30,200,000	161,700,000	105,700,000
Trade and barter expenses	36,600,000	23,200,000	129,200,000	81,800,000
Other than temporary loss on investments	1,600,000	14,500,000
iHeartMedia segment
Segment Reporting Information [Line Items]
Trade and barter revenues	45,900,000	26,000,000	149,200,000	98,000,000
Trade and barter expenses	$ 32,200,000	$ 21,000,000	$ 118,700,000	$ 75,400,000