Goodwill and Intangible Assets, Net - Schedule of Changes to Goodwill (Detail) $ in Thousands	9 Months Ended
Sep. 30, 2020 USD ($)
Goodwill Roll Forward
Balance as of December 31, 2019	$ 1,460,933
Additions	1,513,207
Foreign currency translation adjustments	12,736
Balance as of September 30, 2020	$ 2,986,876

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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