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, 2011	Dec. 31, 2010	Sep. 30, 2010	Sep. 30, 2011 Mortgage Banking [Member] Interest Only [Member]	Sep. 30, 2010 Mortgage Banking [Member] Interest Only [Member]	Sep. 30, 2011 Mortgage Banking [Member] Principal Only [Member]	Sep. 30, 2010 Mortgage Banking [Member] Principal Only [Member]	Sep. 30, 2011 Interest Only [Member]	Sep. 30, 2010 Interest Only [Member]	Sep. 30, 2011 Principal Only [Member]	Sep. 30, 2010 Principal Only [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	$ 1,227,197	$ 769,750	$ 1,214,595	$ 18,963	$ 25,902	$ 8,585	$ 10,721
Weighted average life (in years)								3.7	3.6	3.9	4.7
Annual prepayment rate								21.00%	21.40%	30.30%	27.10%
Annual prepayment rate, Impact on fair value of 10% adverse change								(917)	(1,349)	(266)	(342)
Annual prepayment rate, Impact on fair value of 20% adverse change								(1,763)	(2,595)	(534)	(665)
Annual discount rate on residual cash flows								13.20%	13.20%	22.20%	18.40%
Annual discount rate on servicing cash flows, Impact on fair value of 10% adverse change								(697)	(979)	(394)	(423)
Annual discount rate on servicing cash flows, Impact on fair value of 20% adverse change								$ (1,340)	$ (1,881)	$ (815)	$ (844)