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Stock-Based Compensation - Schedule of Stock-Based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Stock-based compensation expense, by operating expense category
Stock-based compensation expense	$ 139,633	$ 121,003	$ 370,186	$ 371,111
Platform operations
Stock-based compensation expense, by operating expense category
Stock-based compensation expense	5,729	3,517	14,642	14,254
Sales and marketing
Stock-based compensation expense, by operating expense category
Stock-based compensation expense	21,116	14,861	54,039	48,718
Technology and development
Stock-based compensation expense, by operating expense category
Stock-based compensation expense	43,727	22,641	91,283	67,258
General and administrative
Stock-based compensation expense, by operating expense category
Stock-based compensation expense	$ 69,061	$ 79,984	$ 210,222	$ 240,881

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479830/718-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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