GOODWILL AND INTANGIBLE ASSETS - SCHEDULE OF GOODWILL AND INTANGIBLE ASSETS, NET (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 770,226	$ 170,990	$ 150,630
Intangible assets with indefinite lives	153,447	4,884
Intangible assets with definite lives, net of accumulated amortization	175,124	5,908
Total goodwill and intangible assets, net	$ 1,098,797	$ 181,782