Description of Business (Percentage of Consumer Loans Assigned Based on Volumes)	3 Months Ended
	Sep. 30, 2022	Jun. 30, 2022		Mar. 31, 2022		Dec. 31, 2021		Sep. 30, 2021		Jun. 30, 2021		Mar. 31, 2021
Portfolio Program [Member]
Description Of Business [Line Items]
Percentage of new consumer loans unit volume	74.30%	74.00%		72.70%		71.80%		69.90%		66.90%		65.40%
Percentage of new consumer loans dollar volume	70.50%	70.40%	[1]	68.60%	[1]	68.00%	[1]	66.80%	[1]	64.00%	[1]	62.70%	[1]
Purchase Program [Member]
Description Of Business [Line Items]
Percentage of new consumer loans unit volume	25.70%	26.00%		27.30%		28.20%		30.10%		33.10%		34.60%
Percentage of new consumer loans dollar volume	29.50%	29.60%	[1]	31.40%	[1]	32.00%	[1]	33.20%	[1]	36.00%	[1]	37.30%	[1]

[1] Represents advances paid to Dealers on Consumer Loans assigned under our Portfolio Program and one-time payments made to Dealers to purchase Consumer Loans assigned under our Purchase Program. Payments of Dealer Holdback (as defined below) and accelerated Dealer Holdback are not included.