Description Of Business (Percentage Of Consumer Loans Assigned Based On Unit Volumes) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Portfolio Program [Member]
Description Of Business [Line Items]
Percentage of new consumer loans	87.40%	90.70%	93.50%
Purchase Program [Member]
Description Of Business [Line Items]
Percentage of new consumer loans	12.60%	9.30%	6.50%