Common Stock and Stockholders' Equity - Compensation Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Compensation costs charged as an expense
Stock-based compensation	$ 55,662	$ 71,701	$ 167,098	$ 240,971
Cost of revenue (exclusive of depreciation and amortization, which is shown separately)
Compensation costs charged as an expense
Stock-based compensation	675	2,162	4,994	6,310
Advertising and marketing
Compensation costs charged as an expense
Stock-based compensation	3,614	5,244	10,523	15,141
Sales
Compensation costs charged as an expense
Stock-based compensation	11,064	17,518	33,845	57,638
Technology and development
Compensation costs charged as an expense
Stock-based compensation	17,660	22,910	51,532	77,335
General and administrative expenses
Compensation costs charged as an expense
Stock-based compensation	$ 22,649	$ 23,867	$ 66,204	$ 84,547