Description Of Business (Percentage Of Consumer Loans Assigned Based On Unit Volumes) (Details)	3 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012
Portfolio Program [Member]
Description Of Business [Line Items]
Percentage of new consumer loans	92.90%	93.90%	94.40%	94.00%	93.80%	93.60%	93.30%
Purchase Program [Member]
Description Of Business [Line Items]
Percentage of new consumer loans	7.10%	6.10%	5.60%	6.00%	6.20%	6.40%	6.70%