Balance Sheet Components - Other Current Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Prepaid expenses	$ 61,424	$ 55,954
Taxes receivable	125,614	122,823
Restricted cash, current	11,135	7,090
Other receivables	44,333	36,350
Derivative instruments	8,906	25,426
Contract assets, current	13,534	10,033		$ 9,778
Other current assets	58,070	45,867
Other current assets, total	323,016	303,543	$ 258,908	$ 274,857
Joint Venture | Disposed of by sale | xScale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contingent consideration	$ 44,200
Joint Venture | Disposed of by sale | xScale | Contingency consideration
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contingent consideration		$ 34,300