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 $)					9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2012 First Liens [Member]		Sep. 30, 2011 First Liens [Member]		Sep. 30, 2012 Second Liens [Member]		Sep. 30, 2011 Second Liens [Member]		Sep. 30, 2012 Home Equity [Member]		Sep. 30, 2011 Home Equity [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	$ 120,537,000	$ 144,069,000	$ 150,803,000	$ 207,319,000	$ 117,440,000		$ 147,431,000		$ 205,000		$ 241,000		$ 2,892,000		$ 3,131,000
Weighted average life (in years)					4 years 0 months		3 years 8 months		2 years 11 months		2 years 11 months		2 years 11 months		2 years 8 months
Annual prepayment rate					21.20%		23.00%		26.00%		26.00%		26.70%		28.80%
Annual prepayment rate, Impact on fair value of 10% adverse change					(6,261,000)		(8,262,000)		(13,000)		(16,000)		(355,000)		(216,000)
Annual prepayment rate, Impact on fair value of 20% adverse change					(11,953,000)		(15,744,000)		(25,000)		(30,000)		(683,000)		(415,000)
Annual discount rate on servicing cash flows					11.80%		11.70%		14.00%		14.00%		18.00%		18.00%
Annual discount rate on servicing cash flows, Impact on fair value of 10% adverse change					(3,253,000)		(3,898,000)		(6,000)		(7,000)		(191,000)		(96,000)
Annual discount rate on servicing cash flows, Impact on fair value of 20% adverse change					(6,314,000)		(7,573,000)		(11,000)		(13,000)		(370,000)		(186,000)
Annual cost to service (per loan)					116	[1]	122	[1]	50	[1]	50	[1]	50	[1]	50	[1]
Annual cost to service (per loan), Impact on fair value of 10% adverse change					(2,822,000)		(3,401,000)		(5,000)		(5,000)		(96,000)		(50,000)
Annual cost to service (per loan), Impact on fair value of 20% adverse change					(5,625,000)		(6,782,000)		(9,000)		(11,000)		(193,000)		(100,000)
Annual earnings on escrow					1.40%		1.40%		0.00%		0.00%		0.00%		0.00%
Annual earnings on escrow, Impact on fair value of 10% adverse change					(631,000)		(1,195,000)		0		0		0		0
Annual earnings on escrow, Impact on fair value of 20% adverse change					$ (1,263,000)		$ (2,390,000)		$ 0		$ 0		$ 0		$ 0

[1] Amounts represent market participant based assumptions.