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Stock-based Compensation - Schedule of Stock Based Compensation Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Schedule Of Share Based Compensation Employee Stock Purchase Plan Activity [Line Items]
Share based compensation expense	$ 44,967	$ 3,369	$ 48,922	$ 7,711
Cost of revenue [Member]
Schedule Of Share Based Compensation Employee Stock Purchase Plan Activity [Line Items]
Share based compensation expense	762	46	821	83
Selling and Marketing Expense [Member]
Schedule Of Share Based Compensation Employee Stock Purchase Plan Activity [Line Items]
Share based compensation expense	5,143	144	5,350	787
Technology And Development [Member]
Schedule Of Share Based Compensation Employee Stock Purchase Plan Activity [Line Items]
Share based compensation expense	17,619	603	18,145	1,553
General and Administrative Expense [Member]
Schedule Of Share Based Compensation Employee Stock Purchase Plan Activity [Line Items]
Share based compensation expense	21,430	2,568	24,580	5,265
Expense Before Capitalized Software [Member]
Schedule Of Share Based Compensation Employee Stock Purchase Plan Activity [Line Items]
Share based compensation expense	44,954	3,361	48,896	7,688
Capitalized To Internal Use Software [Member]
Schedule Of Share Based Compensation Employee Stock Purchase Plan Activity [Line Items]
Share based compensation expense	$ 13	$ 8	$ 26	$ 23

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- Definition

Schedule of share based compensation employee stock purchase plan activity.

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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