Loan Sales And Securitizations (Schedule Of Sensitivity Of Fair Value Of Retained Or Purchased MSR Immediate 10 Percent And 20 Percent Adverse Changes In Assumptions) (Details) (USD $) In Thousands, unless otherwise specified					9 Months Ended
	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010	Dec. 31, 2009	Sep. 30, 2011 First Liens [Member]	Sep. 30, 2010 First Liens [Member]	Sep. 30, 2011 Second Liens [Member]	Sep. 30, 2010 Second Liens [Member]	Sep. 30, 2011 HELOC [Member]	Sep. 30, 2010 HELOC [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	$ 150,803	$ 207,319	$ 191,943	$ 302,611	$ 147,431	$ 188,397	$ 241	$ 250	$ 3,131	$ 3,296
Weighted average life (in years)					3.7	3.7	2.9	2.5	2.7	2.4
Annual prepayment rate					23.00%	23.20%	26.00%	30.00%	28.80%	32.10%
Annual prepayment rate, Impact on fair value of 10% adverse change					(8,262)	(11,238)	(16)	(22)	(216)	(262)
Annual prepayment rate, Impact on fair value of 20% adverse change					(15,744)	(21,442)	(30)	(43)	(415)	(500)
Annual discount rate on servicing cash flows					11.70%	11.60%	14.00%	14.00%	18.00%	18.00%
Annual discount rate on servicing cash flows, Impact on fair value of 10% adverse change					(3,898)	(4,924)	(7)	(7)	(96)	(96)
Annual discount rate on servicing cash flows, Impact on fair value of 20% adverse change					(7,573)	(9,563)	(13)	(13)	(186)	(185)
Annual cost to service (per loan)					122	117	50	50	50	50
Annual cost to service (per loan), Impact on fair value of 10% adverse change					(3,401)	(4,773)	(5)	(5)	(50)	(53)
Annual cost to service (per loan), Impact on fair value of 20% adverse change					(6,782)	(9,521)	(11)	(11)	(100)	(106)
Annual earnings on escrow					1.40%	1.60%
Annual earnings on escrow, Impact on fair value of 10% adverse change					(1,195)	(1,706)
Annual earnings on escrow, Impact on fair value of 20% adverse change					$ (2,390)	$ (3,412)
Sensitivity analysis of fair value of interests continued to be held by transferor servicing assets or liabilities impact of 10% percent adverse change in other assumption percent	10.00%
Sensitivity analysis of fair value of interests continued to be held by transferor servicing assets or liabilities impact of 20% percent adverse change in other assumption percent	20.00%