Balance Sheet Components - Other Current Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid expenses	$ 70,433		$ 64,832
Taxes receivable	98,245		110,961
Restricted cash, current	10,887		26,919
Other receivables	12,611		7,797
Derivative instruments	62,170		4,175
Contract asset, current	9,778	$ 9,002	0
Other current assets	10,733		17,343
Other current assets, total	$ 274,857	$ 241,029	$ 232,027