Finance Receivables, Net - Aging of Finance Receivable (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Mar. 31, 2020
Financing Receivable, Past Due [Line Items]
Finance receivable, current, before allowance for credit loss premium and discount, year one	$ 53,211
Financing receivable, year one, originated, current fiscal year	57,747
Finance receivable, current, before allowance for credit loss, premium and discount, year two		$ 93,838
Financing receivable, year two, originated, fiscal year before current fiscal year		120,013
Finance receivable, before allowance for credit loss, premium and discount	189,832
Finance receivable, current, before allowance for credit loss, premium and discount, year three				$ 9,737
Fair value premium on non-PCD finance receivables	22,981	0	$ 40,251
Financing receivable, current, before allowance for credit loss, premium and discount	156,786
Financing receivable, year three, originated, two years before current fiscal year				12,072
Finance receivables, amortized cost	212,813	0	$ 256,595
1 to 30 days past due
Financing Receivable, Past Due [Line Items]
Financing receivable, past due	3,083	11,180		1,132
Finance receivable, before allowance for credit loss, premium and discount	15,395
31 to 60 days past due
Financing Receivable, Past Due [Line Items]
Financing receivable, past due	1,048	6,917		556
Finance receivable, before allowance for credit loss, premium and discount	8,521
61 to 90 days past due
Financing Receivable, Past Due [Line Items]
Financing receivable, past due	405	8,078		647
Finance receivable, before allowance for credit loss, premium and discount	9,130
Total past due
Financing Receivable, Past Due [Line Items]
Financing receivable, past due	4,536	$ 26,175		$ 2,335
Finance receivable, before allowance for credit loss, premium and discount	$ 33,046