Segment Information - Summary of Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Revenues from external customers	$ 475,437	$ 761,890	$ 1,399,212	$ 1,353,008
Gross profit	66,357	63,128	147,997	99,304
Ecommerce
Segment Reporting Information [Line Items]
Revenues from external customers	321,632	579,663	996,995	1,001,971
Gross profit	33,509	49,638	67,828	81,475
Wholesale
Segment Reporting Information [Line Items]
Revenues from external customers	82,901	128,108	222,885	246,132
Gross profit	(1,934)	8,516	(4,686)	8,234
Retail Financing
Segment Reporting Information [Line Items]
Revenues from external customers	32,121		79,808
Gross profit	28,720		73,682
All Other
Segment Reporting Information [Line Items]
Revenues from external customers	38,783	54,119	99,524	104,905
Gross profit	$ 6,062	$ 4,974	$ 11,173	$ 9,595