Variable Interest Entities and Securitizations - Summary of Total Assets and Total Liabilities Associated With Variable Interests in Consolidated VIEs (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current Assets:
Restricted cash	$ 94,305	$ 82,450
Finance receivables at fair value, current	13,644
Finance receivables held for sale, net	210,729
Total current assets	1,372,459	2,102,292
Finance receivables at fair value, noncurrent	166,382
Total assets	1,808,960	2,366,750
Current Liabilities:
Current portion of securitization debt	54,652
Warehouse credit facilities	135,453
Total current liabilities	719,722	827,256
Securitization debt, net of current portion	607,790	610,618
Other liabilities	15,696	4,090
Total liabilities	1,363,828	1,451,556
Securitization Vehicles
Current Assets:
Restricted cash	10,133
Finance receivables at fair value, current	5,344
Other assets	1,141
Total current assets	16,618
Finance receivables at fair value, noncurrent	89,117
Total assets	105,735
Current Liabilities:
Current portion of securitization debt	54,652
Total current liabilities	54,652
Securitization debt, net of current portion	40,842
Other liabilities	97
Total liabilities	95,591
Warehouse Facilities
Current Assets:
Restricted cash	9,356
Finance receivables at fair value, current	5,597
Finance receivables held for sale, net	137,077
Other assets	264
Total current assets	152,294
Finance receivables at fair value, noncurrent	46,647
Total assets	198,941
Current Liabilities:
Warehouse credit facilities	135,453
Total current liabilities	135,453
Other liabilities	407
Total liabilities	135,860
Consolidated VIEs
Current Assets:
Restricted cash	19,489	0
Finance receivables at fair value, current	10,941	0
Finance receivables held for sale, net	137,077	0
Other assets	1,405
Total current assets	168,912
Finance receivables at fair value, noncurrent	135,764	$ 0
Total assets	304,676
Current Liabilities:
Current portion of securitization debt	54,652
Warehouse credit facilities	135,453
Total current liabilities	190,105
Securitization debt, net of current portion	40,842
Other liabilities	504
Total liabilities	$ 231,451