CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating activities
Net loss	$ (476,675)	$ (241,118)
Adjustments to reconcile net loss to net cash used in operating activities:
Impairment charges	206,127
Gain on debt extinguishment	(37,917)
Depreciation and amortization	28,005	9,497
Amortization of debt issuance costs	3,777	1,784
Realized gains on securitization transaction	(45,589)
Deferred tax	(23,855)
Losses on finance receivables and securitization debt, net	39,464
Stock-based compensation expense	6,613	9,754
Provision to record inventory at lower of cost or net realizable value	(5,033)	5,625
Other, net	4,717	4,874
Changes in operating assets and liabilities:
Originations of finance receivables held for sale	(483,167)
Principal payments received on finance receivables held for sale	38,297
Proceeds from sale of finance receivables held for sale, net	509,612
Other	(5,924)
Accounts receivable	63,252	(32,936)
Inventory	293,589	(183,731)
Prepaid expenses and other current assets	12,420	(39,356)
Other assets	(2,678)	(7,390)
Accounts payable	(22,183)	26,144
Accrued expenses	(27,020)	43,512
Deferred revenue	(59,490)	39,227
Other liabilities	(39,444)	38,655
Net cash used in operating activities	(23,102)	(325,459)
Investing activities
Originations of finance receivables at fair value	(49,475)
Principal payments received on finance receivables at fair value	106,829
Proceeds from sale of finance receivables at fair value, net	43,262
Principal payments received on beneficial interests	5,571
Purchase of property and equipment	(19,968)	(18,786)
Acquisition of business, net of cash acquired	(267,488)	(75,875)
Net cash used in investing activities	(181,269)	(94,661)
Financing activities
Principal repayment under secured financing agreements	(176,909)
Proceeds from vehicle floorplan	1,286,000	1,901,457
Repayments of vehicle floorplan	(1,453,529)	(1,789,215)
Proceeds from warehouse credit facilities	419,000
Repayments of warehouse credit facilities	(460,566)
Other financing activities	(1,977)
Repayments of convertible senior notes	(18,458)
Proceeds from issuance of convertible senior notes		625,000
Issuance costs paid for convertible senior notes		(16,129)
Proceeds from exercise of stock options		5,085
Net cash (used in) provided by financing activities	(406,439)	726,198
Net decrease in cash, cash equivalents and restricted cash	(610,810)	306,078
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	603,965	1,396,117
Supplemental disclosure of cash flow information:
Cash paid for interest	24,619	11,116
Cash paid for income taxes	2,062	329
Supplemental disclosure of non-cash investing and financing activities:
Fair value of beneficial interests received in securitization transactions	30,082
Accrued property and equipment expenditures	$ 538	1,652
Issuance of common stock for CarStory acquisition		38,811
Fair value of unvested stock options assumed for acquisition of business		$ 1,017