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 $)					3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2013 First Liens [Member]		Mar. 31, 2012 First Liens [Member]		Mar. 31, 2013 Second Liens [Member]		Mar. 31, 2012 Second Liens [Member]		Mar. 31, 2013 Home Equity [Member]		Mar. 31, 2012 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	$ 109,102,000	$ 114,311,000	$ 142,956,000	$ 144,069,000	$ 106,191,000		$ 139,676,000		$ 193,000		$ 222,000		$ 2,718,000		$ 3,058,000
Weighted average life (in years)					4 years 0 months		4 years 0 months		3 years 1 month		2 years 11 months		3 years 1 month		2 years 10 months
Annual prepayment rate					20.70%		20.80%		28.50%		26.00%		28.90%		27.50%
Annual prepayment rate, Impact on fair value of 10% adverse change					(5,343,000)		(7,218,000)		(12,000)		(14,000)		(149,000)		(190,000)
Annual prepayment rate, Impact on fair value of 20% adverse change					(10,210,000)		(13,794,000)		(24,000)		(27,000)		(287,000)		(365,000)
Annual discount rate on servicing cash flows					11.80%		11.80%		14.00%		14.00%		18.00%		18.00%
Annual discount rate on servicing cash flows, Impact on fair value of 10% adverse change					(2,945,000)		(3,939,000)		(5,000)		(6,000)		(84,000)		(95,000)
Annual discount rate on servicing cash flows, Impact on fair value of 20% adverse change					(5,715,000)		(7,638,000)		(10,000)		(12,000)		(163,000)		(184,000)
Annual cost to service (per loan)					118	[1]	116	[1]	50	[1]	50	[1]	50	[1]	50	[1]
Annual cost to service (per loan), Impact on fair value of 10% adverse change					(2,597,000)		(3,303,000)		(4,000)		(5,000)		(42,000)		(49,000)
Annual cost to service (per loan), Impact on fair value of 20% adverse change					(5,177,000)		(6,585,000)		(9,000)		(10,000)		(84,000)		(98,000)
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					(686,000)		(1,127,000)		0		0		0		0
Annual earnings on escrow, Impact on fair value of 20% adverse change					$ (1,372,000)		$ (2,255,000)		$ 0		$ 0		$ 0		$ 0

[1] Amounts represent market participant based assumptions.