Common Stock and Stockholders' Equity - Compensation Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Compensation costs charged as an expense
Stock-based compensation	$ 302,586	$ 475,531	$ 66,702
Cost of revenue (exclusive of depreciation and amortization, which is shown separately)
Compensation costs charged as an expense
Stock-based compensation	8,280	2,700	0
Advertising and marketing
Compensation costs charged as an expense
Stock-based compensation	18,952	26,995	4,956
Sales
Compensation costs charged as an expense
Stock-based compensation	71,475	65,730	10,286
Technology and development
Compensation costs charged as an expense
Stock-based compensation	95,561	60,556	7,573
General and administrative expenses
Compensation costs charged as an expense
Stock-based compensation	$ 108,318	$ 319,550	$ 43,887