Loan Sales And Securitizations (Schedule Of Sensitivity Of Fair Value Of Other Retained Interests To Immediate 10 Percent And 20 Percent Adverse Changes Assumptions) (Details) (USD $) In Thousands, unless otherwise specified				6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Jun. 30, 2013 Interest Only Strip [Member]	Jun. 30, 2012 Interest Only Strip [Member]	Jun. 30, 2013 Principal Only Strip [Member]	Jun. 30, 2012 Principal Only Strip [Member]
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]
Fair value of retained interests	$ 1,267,348	$ 1,262,720	$ 1,361,717	$ 10,608	$ 14,669	$ 5,264	$ 5,667
Weighted average life (in years)				4 years 4 months	3 years 11 months	3 years 7 months	2 years 7 months
Annual prepayment rate				17.20%	19.20%	17.40%	32.00%
Annual prepayment rate, Impact on fair value of 10% adverse change				(444)	(678)	(219)	(321)
Annual prepayment rate, Impact on fair value of 20% adverse change				(857)	(1,304)	(458)	(673)
Annual discount rate on residual cash flows				13.10%	13.30%		82.20%
Annual discount rate on servicing cash flows, Impact on fair value of 10% adverse change				(394)	(548)		(253)
Annual discount rate on servicing cash flows, Impact on fair value of 20% adverse change				$ (757)	$ (1,053)		$ (482)