Quarterly report pursuant to Section 13 or 15(d)

REVENUE RECOGNITION (Sponsorship & Advertising Revenue) (Details)

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REVENUE RECOGNITION (Sponsorship & Advertising Revenue) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Disaggregation of Revenue [Line Items]        
Revenue $ 2,868,315 $ 2,683,585 $ 4,350,699 $ 3,926,464
Operating Segments [Member] | Sponsorship & Advertising [Member]        
Disaggregation of Revenue [Line Items]        
Revenue $ 139,938 $ 124,563 $ 214,496 $ 188,551
Percentage of Sponsorship & Advertising revenue to consolidated revenue 4.90% 4.60% 4.90% 4.80%