REVENUE (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Revenue
Revenue recognized	$ 3,465,601	$ 3,091,595	$ 6,556,500	$ 5,568,082
Loyalty program [Member]
Revenue
Deferred revenue liability	4,800		4,800		$ 4,500
Revenue recognized	$ 3,800	$ 3,800	$ 7,200	$ 6,900