CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating activities
Net loss	$ (425,548)	$ (142,996)
Adjustments to reconcile net loss to net cash used in operating activities:
Impairment charges	205,110
Depreciation and amortization	18,010	6,028
Amortization of debt issuance costs	2,523	698
Realized gain on the 2022-1 securitization transaction	(29,617)
Deferred tax	(23,855)
Losses on finance receivables and securitization debt, net	29,457
Stock-based compensation expense	5,405	8,212
Provision to record inventory at lower of cost or net realizable value	(2,006)	3,093
Other, net	3,466	2,818
Changes in operating assets and liabilities:
Originations of finance receivables held for sale	(319,314)
Principal payments received on finance receivables held for sale	23,179
Proceeds from sale of finance receivables held for sale, net	271,820
Other	(4,011)
Accounts receivable	34,192	(41,393)
Inventory	192,618	(99,412)
Prepaid expenses and other current assets	13,513	(26,669)
Other assets	(1,670)	(3,948)
Accounts payable	(15,352)	36,507
Accrued expenses	(23,832)	26,306
Deferred revenue	(58,003)	16,788
Other liabilities	(33,604)	62,117
Net cash used in operating activities	(137,519)	(151,851)
Investing activities
Originations of finance receivables at fair value	(49,475)
Principal payments received on finance receivables at fair value	74,690
Proceeds from sale of finance receivables at fair value, net	29,026
Principal payments received on beneficial interests	2,720
Purchase of property and equipment	(16,046)	(8,943)
Acquisition of business, net of cash acquired	(267,488)	(76,145)
Net cash used in investing activities	(226,573)	(85,088)
Financing activities
Principal repayment under secured financing agreements	(105,563)
Proceeds from vehicle floorplan	1,074,184	1,070,110
Repayments of vehicle floorplan	(1,164,533)	(1,035,727)
Proceeds from warehouse credit facilities	261,700
Repayments of warehouse credit facilities	(228,744)
Other financing activities	(1,344)
Proceeds from issuance of convertible senior notes		625,000
Issuance costs paid for convertible senior notes		(16,175)
Proceeds from exercise of stock options		4,381
Net cash (used in) provided by financing activities	(164,300)	647,589
Net decrease in cash, cash equivalents and restricted cash	(528,392)	410,650
Net (decrease) increase in cash, cash equivalents and restricted cash	1,214,775	1,090,039
Cash, cash equivalents and restricted cash at the end of period	686,383	1,500,689
Supplemental disclosure of cash flow information:
Cash paid for interest	16,299	6,713
Cash paid for income taxes	2,062	269
Supplemental disclosure of non-cash investing and financing activities:
Fair value of beneficial interests received in securitization transactions	$ 16,473
Issuance of common stock for CarStory acquisition		39,030
Fair value of unvested stock options assumed for acquisition of business		$ 1,017