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Goodwill and Intangible Assets, Net - Schedule of Goodwill and Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]      
Goodwill $ 8,228,865 $ 7,942,023 $ 7,992,941
Intangible assets with indefinite lives 1,478,729 1,457,072  
Intangible assets with definite lives, net 829,807 989,580  
Goodwill and intangible assets $ 10,537,401 $ 10,388,675