Stock-based Compensation - Summary of Total Stock-based Compensation Cost from Stock Options, RSUs, ESPP, RSAs, and Sales of Stock (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 33,895	$ 137,443	$ 71,104	$ 147,746
Stock-based compensation capitalized for software development	1,895	837	4,061	920
Total stock-based compensation cost	35,790	138,280	75,165	148,666
Cost of Revenue
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	2,046	4,918	3,504	6,079
Sales and Marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	12,572	42,855	22,868	46,107
Research and Development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	13,144	51,317	26,152	54,563
General and Administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 6,133	$ 38,353	$ 18,580	$ 40,997