Finance Receivables, Net - Credit Quality Indicators of Amortized Cost of Finance Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Mar. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	$ 57,747
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year		$ 120,013
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year				$ 12,072
Finance receivable, before allowance for credit loss, premium and discount	189,832
Fair value premium on non-PCD finance receivables	22,981	0	$ 40,251
Finance receivables, amortized cost	212,813	0	$ 256,595
No FICO score identified or obtained
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	14,928
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year		35,390
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year				1,044
Finance receivable, before allowance for credit loss, premium and discount	51,362
599 or less
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	19,589
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year		43,693
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year				5,389
Finance receivable, before allowance for credit loss, premium and discount	68,671
Between 600 and 699
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	19,910
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year		36,548
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year				4,958
Finance receivable, before allowance for credit loss, premium and discount	61,416
700 or greater
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	3,320
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year		$ 4,382
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year				$ 681
Finance receivable, before allowance for credit loss, premium and discount	$ 8,383