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				9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2013 Interest Only Strip [Member]	Sep. 30, 2012 Interest Only Strip [Member]	Sep. 30, 2013 Principal Only Strip [Member]	Sep. 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	$ 1,343,134	$ 1,262,720	$ 1,204,366	$ 10,618	$ 13,739	$ 5,096	$ 5,462
Weighted average life (in years)				4 years 5 months	3 years 11 months	1 year 11 months	1 year 11 months
Annual prepayment rate				16.80%	19.10%	41.90%	49.50%
Annual prepayment rate, Impact on fair value of 10% adverse change				(476)	(618)	(225)	(304)
Annual prepayment rate, Impact on fair value of 20% adverse change				(915)	(1,189)	(474)	(640)
Annual discount rate on residual cash flows				9.50%	13.30%
Annual discount rate on servicing cash flows, Impact on fair value of 10% adverse change				(343)	(504)
Annual discount rate on servicing cash flows, Impact on fair value of 20% adverse change				$ (660)	$ (968)