Debt (Schedule Of Outstanding Term ABS Financings) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Term ABS 2013-1 [Member]
Debt Instrument [Line Items]
Debt financing close date	Apr. 25, 2013
Net Book Value Of Loans Pledged As Collateral	$ 187.8
Term ABS 2013-2 [Member]
Debt Instrument [Line Items]
Debt financing close date	Oct. 31, 2013
Net Book Value Of Loans Pledged As Collateral	$ 250.1
Term ABS 2014-1 [Member]
Debt Instrument [Line Items]
Debt financing close date	Apr. 16, 2014
Net Book Value Of Loans Pledged As Collateral	$ 374.7
Term ABS 2014-2 [Member]
Debt Instrument [Line Items]
Debt financing close date	Sep. 25, 2014
Net Book Value Of Loans Pledged As Collateral	$ 437.6
Term ABS 2015-2 [Member]
Debt Instrument [Line Items]
Debt financing close date	Jan. 29, 2015
Net Book Value Of Loans Pledged As Collateral	$ 375.9
Term ABS 2015-2 [Member]
Debt Instrument [Line Items]
Debt financing close date	Aug. 20, 2015
Net Book Value Of Loans Pledged As Collateral	$ 375.5