Description Of Business (Percentage Of Consumer Loans Assigned Based On Unit and Dollar Volumes) (Details)		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Portfolio Program [Member]
Description Of Business [Line Items]
Percentage of new consumer loans in unit volume		74.00%	73.50%	67.90%
Percentage of new consumer loans in dollar volume	[1]	70.70%	69.80%	65.00%
Purchase Program [Member]
Description Of Business [Line Items]
Percentage of new consumer loans in unit volume		26.00%	26.50%	32.10%
Percentage of new consumer loans in dollar volume	[1]	29.30%	30.20%	35.00%

[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.