Annual report pursuant to Section 13 and 15(d)

LONG-LIVED ASSETS (Goodwill) (Details)

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LONG-LIVED ASSETS (Goodwill) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Goodwill [Roll Forward]        
Gross Goodwill - Beginning of period   $ 2,258,306 $ 2,179,452  
Accumulated impairment losses   (435,363) (424,863)  
Net Goodwill - Beginning of period   1,822,943 1,754,589  
Acquisitions—current year   163,793 52,618  
Acquisitions—prior year   8,428 55,238  
Dispositions     (7,053)  
Impairment $ (10,500) 0 (10,500) $ (20,000)
Foreign exchange   3,334 (21,949)  
Gross Goodwill - End of period 2,258,306 2,433,861 2,258,306 2,179,452
Accumulated impairment losses (435,363) (435,363) (435,363) (424,863)
Net Goodwill - End of period 1,822,943 1,998,498 1,822,943 1,754,589
Concerts [Member]        
Goodwill [Roll Forward]        
Gross Goodwill - Beginning of period   1,094,604 1,015,913  
Accumulated impairment losses   (435,363) (424,863)  
Net Goodwill - Beginning of period   659,241 591,050  
Acquisitions—current year   121,355 42,841  
Acquisitions—prior year   8,428 53,541  
Dispositions     (7,053)  
Impairment     (10,500)  
Foreign exchange   1,670 (10,638)  
Gross Goodwill - End of period 1,094,604 1,226,057 1,094,604 1,015,913
Accumulated impairment losses (435,363) (435,363) (435,363) (424,863)
Net Goodwill - End of period 659,241 790,694 659,241 591,050
Ticketing [Member]        
Goodwill [Roll Forward]        
Gross Goodwill - Beginning of period   762,953 761,786  
Accumulated impairment losses   0 0  
Net Goodwill - Beginning of period   762,953 761,786  
Acquisitions—current year   4,017 5,875  
Acquisitions—prior year   0 0  
Dispositions     0  
Impairment     0  
Foreign exchange   (707) (4,708)  
Gross Goodwill - End of period 762,953 766,263 762,953 761,786
Accumulated impairment losses 0 0 0 0
Net Goodwill - End of period 762,953 766,263 762,953 761,786
Sponsorship and Advertising [Member]        
Goodwill [Roll Forward]        
Gross Goodwill - Beginning of period   400,749 401,753  
Accumulated impairment losses   0 0  
Net Goodwill - Beginning of period   400,749 401,753  
Acquisitions—current year   38,421 3,902  
Acquisitions—prior year   0 1,697  
Dispositions     0  
Impairment     0  
Foreign exchange   2,371 (6,603)  
Gross Goodwill - End of period 400,749 441,541 400,749 401,753
Accumulated impairment losses 0 0 0 0
Net Goodwill - End of period $ 400,749 $ 441,541 $ 400,749 $ 401,753