Goodwill and Acquired Intangible Assets, Net - Summary of Finite-Lived Intangible Assets, Amortization Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization of Intangible Assets	$ 85,394	$ 30,270
Cost of revenue
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization of Intangible Assets	82,185	27,576
Sales and marketing
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization of Intangible Assets	$ 3,209	$ 2,694