Annual report pursuant to Section 13 and 15(d)

REVENUE RECOGNITION (Ticketing Contract Advance) (Details)

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REVENUE RECOGNITION (Ticketing Contract Advance) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Capitalized Contract Cost [Line Items]      
Amortization of non-recoupable ticketing contract advances $ 80,087 $ 83,334 $ 85,067
Ticketing [Member]      
Capitalized Contract Cost [Line Items]      
Amortization of non-recoupable ticketing contract advances 80,100 83,300 $ 85,100
Prepaid Expenses and Other Current Assets [Member] | Ticketing [Member]      
Capitalized Contract Cost [Line Items]      
Capitalized Contract Cost, Gross 75,500 76,000  
Other Noncurrent Assets [Member] | Ticketing [Member]      
Capitalized Contract Cost [Line Items]      
Capitalized Contract Cost, Gross $ 78,500 $ 78,600