SEGMENT DATA Segment Results Of Operations (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenue	$ 2,889,448	$ 3,773,684	$ 3,157,009	$ 1,727,828	$ 2,601,855	$ 3,835,246	$ 2,868,315	$ 1,482,384	$ 11,547,969	$ 10,787,800	$ 9,687,222
Direct operating expenses									8,467,182	7,967,932	7,181,898
Selling, general and administrative expenses									2,145,486	1,997,028	1,907,723
Depreciation and amortization									443,991	386,529	372,201
Loss (gain) on disposal of operating assets									(2,373)	10,369	(969)
Corporate expenses									168,839	153,406	134,972
Operating income (loss)	$ (82,920)	$ 260,041	$ 171,586	$ (23,863)	$ (90,378)	$ 234,219	$ 134,725	$ (6,030)	324,844	272,536	91,397
Capital expenditures									337,578	262,314	247,894
Operating Segments [Member] | Concerts [Member]
Segment Reporting Information [Line Items]
Revenue									9,428,094	8,770,031	7,892,076
Direct operating expenses									7,857,437	7,340,757	6,641,071
Selling, general and administrative expenses									1,386,928	1,248,346	1,119,335
Depreciation and amortization									239,682	206,772	226,315
Loss (gain) on disposal of operating assets									(2,490)	10,361	(1,056)
Corporate expenses									0	0	0
Operating income (loss)									(53,463)	(36,205)	(93,589)
Capital expenditures									186,819	129,129	109,801
Operating Segments [Member] | Ticketing [Member]
Segment Reporting Information [Line Items]
Revenue									1,545,189	1,529,566	1,346,510
Direct operating expenses									514,169	549,265	460,881
Selling, general and administrative expenses									642,052	634,829	681,948
Depreciation and amortization									156,894	143,551	112,727
Loss (gain) on disposal of operating assets									116	7	49
Corporate expenses									0	0	0
Operating income (loss)									231,958	201,914	90,905
Capital expenditures									105,246	110,202	105,317
Operating Segments [Member] | Sponsorship and Advertising [Member]
Segment Reporting Information [Line Items]
Revenue									590,274	503,968	445,148
Direct operating expenses									114,326	92,494	78,725
Selling, general and administrative expenses									112,594	97,540	87,268
Depreciation and amortization									33,084	30,779	27,669
Loss (gain) on disposal of operating assets									0	2	0
Corporate expenses									0	0	0
Operating income (loss)									330,270	283,153	251,486
Capital expenditures									10,261	7,541	6,701
Operating Segments [Member] | Other
Segment Reporting Information [Line Items]
Revenue									3,162	3,724	21,012
Direct operating expenses									0	4,905	18,746
Selling, general and administrative expenses									3,912	16,313	19,172
Depreciation and amortization									364	817	432
Loss (gain) on disposal of operating assets									0	0	0
Corporate expenses									0	0	0
Operating income (loss)									(1,114)	(18,311)	(17,338)
Capital expenditures									0	169	149
Operating Segments [Member] | Corporate
Segment Reporting Information [Line Items]
Revenue									0	0	0
Direct operating expenses									0	0	0
Selling, general and administrative expenses									0	0	0
Depreciation and amortization									13,967	4,610	5,057
Loss (gain) on disposal of operating assets									1	(1)	38
Corporate expenses									168,839	153,406	134,972
Operating income (loss)									(182,807)	(158,015)	(140,067)
Capital expenditures									35,252	15,273	25,926
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue									(18,750)	(19,489)	(17,524)
Direct operating expenses									(18,750)	(19,489)	(17,525)
Selling, general and administrative expenses									0	0	0
Depreciation and amortization									0	0	1
Loss (gain) on disposal of operating assets									0	0	0
Corporate expenses									0	0	0
Operating income (loss)									0	0	0
Capital expenditures									0	0	0
Intersegment Eliminations [Member] | Concerts [Member]
Segment Reporting Information [Line Items]
Revenue									6,672	5,193	1,061
Intersegment Eliminations [Member] | Ticketing [Member]
Segment Reporting Information [Line Items]
Revenue									12,078	14,296	16,643
Intersegment Eliminations [Member] | Sponsorship and Advertising [Member]
Segment Reporting Information [Line Items]
Revenue									0	0	0
Intersegment Eliminations [Member] | Other
Segment Reporting Information [Line Items]
Revenue									0	0	0
Intersegment Eliminations [Member] | Corporate
Segment Reporting Information [Line Items]
Revenue									$ 0	$ 0	$ 0