SEGMENT DATA - Schedule of Operating Segment Results (Detail) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended							4 Months Ended	8 Months Ended	12 Months Ended
	May 01, 2019	Jun. 30, 2019	Dec. 31, 2019	Sep. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	May 01, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenue	$ 277,674	$ 635,646	$ 1,026,072	$ 948,338	$ 795,797	$ 1,026,295	$ 920,492	$ 891,764	$ 772,772	$ 1,073,471	$ 2,610,056	$ 3,611,323	$ 3,586,647
Direct operating expenses	92,581	184,291	332,147	290,971	267,115	288,949	268,606	263,752	241,066	359,696	807,409	1,062,373	1,059,123
Selling, general and administrative expenses	103,552	227,140	368,313	341,353	332,793	373,203	329,436	328,200	346,092	436,345	936,806	1,376,931	1,346,063
Corporate expenses	18,979	34,390	64,148	70,044	47,041	65,433	56,699	52,478	52,898	66,020	168,582	227,508	208,648
Depreciation and amortization	14,544	59,383	94,972	95,268	38,290	36,405	43,295	64,877	67,374	52,834	249,623	211,951	275,304
Impairment charges	0	0	0	0	91,382	0	33,150	0	0	91,382	0	33,150	6,040
Other operating income (expense), net	(127)	3,246	(1,366)	(9,880)	(27)	(2,354)	(2,462)	(1,218)	(3,232)	(154)	(8,000)	(9,266)	9,313
Operating income (loss)	$ 47,891	$ 133,688	165,126	$ 140,822	$ 19,149	259,951	$ 186,844	$ 181,239	$ 62,110	67,040	439,636	690,144	700,782
Segment assets			11,021,099			12,269,515					11,021,099	12,269,515
Segment assets						7,902,245						7,902,245	7,801,639
Capital expenditures										36,197	75,993	85,245	67,728
Share-based compensation expense										498	26,411	2,066	2,488
Corporate and other reconciling items
Segment Reporting Information [Line Items]
Revenue										0	0	0	0
Direct operating expenses										0	0	0	0
Selling, general and administrative expenses										0	0	0	0
Corporate expenses										66,040	168,614	227,575	208,648
Depreciation and amortization										6,586	5,443	20,674	26,580
Impairment charges										91,382		33,150	6,040
Other operating income (expense), net										(154)	(8,000)	(9,266)	9,313
Operating income (loss)										(164,162)	(182,057)	(290,665)	(231,955)
Segment assets			616,202								616,202
Segment assets						377,731						377,731	315,427
Capital expenditures										3,757	9,997	6,888	8,781
Share-based compensation expense										498	26,411	2,066	2,488
Eliminations
Segment Reporting Information [Line Items]
Revenue										(2,568)	(5,036)	(6,508)	(6,511)
Direct operating expenses										(364)	(747)	(211)	(313)
Selling, general and administrative expenses										(2,184)	(4,257)	(6,230)	(6,198)
Corporate expenses										(20)	(32)	(67)	0
Depreciation and amortization										0	0	0	0
Impairment charges										0		0	0
Other operating income (expense), net										0	0	0	0
Operating income (loss)										0	0	0	0
Segment assets			(3,778)								(3,778)
Segment assets						(206)						(206)	(222)
Capital expenditures										0	0	0	0
Share-based compensation expense										0	0	0	0
Intersegment revenues
Segment Reporting Information [Line Items]
Revenue										2,568	5,036	6,508	6,511
Audio | Operating Segments
Segment Reporting Information [Line Items]
Revenue										1,006,677	2,447,800	3,353,770	3,357,207
Direct operating expenses										350,501	787,050	1,034,224	1,031,203
Selling, general and administrative expenses										396,032	852,203	1,248,671	1,221,597
Corporate expenses											0	0	0
Depreciation and amortization										40,982	229,404	172,991	228,591
Impairment charges										0		0	0
Other operating income (expense), net										0	0	0	0
Operating income (loss)										219,162	579,143	897,884	875,816
Segment assets			10,035,720								10,035,720
Segment assets						7,081,172						7,081,172	7,084,134
Capital expenditures										31,177	62,016	72,392	55,691
Share-based compensation expense										0	0	0	0
Audio | Intersegment revenues
Segment Reporting Information [Line Items]
Revenue										243	447	0	0
Audio and Media Services
Segment Reporting Information [Line Items]
Segment assets			$ 372,955								372,955
Segment assets													402,300
Audio and Media Services | Operating Segments
Segment Reporting Information [Line Items]
Revenue										69,362	167,292	264,061	235,951
Direct operating expenses										9,559	21,106	28,360	28,233
Selling, general and administrative expenses										42,497	88,860	134,490	130,664
Corporate expenses											0	0	0
Depreciation and amortization										5,266	14,776	18,286	20,133
Impairment charges										0		0	0
Other operating income (expense), net										0	0	0	0
Operating income (loss)										12,040	42,550	82,925	56,921
Segment assets						$ 443,548						443,548
Capital expenditures										1,263	3,980	5,965	3,256
Share-based compensation expense										0	0	0	0
Audio and Media Services | Intersegment revenues
Segment Reporting Information [Line Items]
Revenue										$ 2,325	$ 4,589	$ 6,508	$ 6,511