STOCKHOLDERS' EQUITY - Summary of Total Stock-based Compensation Cost from Stock Options, RSUs, ESPP, RSAs, and Sales of Stock (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 56,150	$ 48,175	$ 160,006	$ 137,532
Stock-based compensation capitalized for software development and cloud-computing arrangement implementation costs	5,399	3,599	14,582	9,553
Total stock-based compensation cost	61,549	51,774	174,588	147,085
Cost of revenue
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	3,196	2,079	9,152	6,015
Sales and marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	16,544	13,924	48,851	42,408
Research and development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	20,960	18,311	60,562	49,657
General and administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 15,450	$ 13,861	$ 41,441	$ 39,452