Stock-Based Compensation - Schedule of Stock-Based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Stock-based compensation expense, by operating expense category
Stock-based compensation expense	$ 126,340	$ 117,083	$ 236,960	$ 230,553
Platform operations
Stock-based compensation expense, by operating expense category
Stock-based compensation expense	7,272	4,967	12,827	8,913
Sales and marketing
Stock-based compensation expense, by operating expense category
Stock-based compensation expense	25,068	18,800	45,360	32,923
Technology and development
Stock-based compensation expense, by operating expense category
Stock-based compensation expense	32,509	26,689	60,483	47,556
General and administrative
Stock-based compensation expense, by operating expense category
Stock-based compensation expense	$ 61,491	$ 66,627	$ 118,290	$ 141,161