Segment Information - Reconciliation of Total Reportable Segment Revenue and Gross Profit to Consolidated Total Revenue and Loss Before Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Reconciliation to consolidated total revenue
Total revenue	$ 896,756	$ 323,005	$ 2,249,764	$ 951,871
Reconciliation to consolidated loss before provision for income taxes
Gross profit	58,089	25,445	157,393	51,439
Selling, general and administrative expenses	148,718	61,127	381,482	167,418
Depreciation and amortization	3,376	1,191	9,276	3,239
Interest expense	7,028	2,259	14,720	6,382
Interest income	(2,930)	(1,289)	(7,288)	(3,960)
Revaluation of preferred stock warrant				20,470
Other income, net	(10)	(26)	(58)	(111)
Loss before provision for income taxes	(98,093)	(37,817)	(240,739)	(141,999)
All Other
Reconciliation to consolidated total revenue
Total revenue	3,190	317	9,749	1,043
Reconciliation to consolidated loss before provision for income taxes
Gross profit	1,798	123	5,454	345
Reportable Segments
Reconciliation to consolidated total revenue
Total revenue	893,566	322,688	2,240,015	950,828
Reconciliation to consolidated loss before provision for income taxes
Gross profit	$ 56,291	$ 25,322	$ 151,939	$ 51,094