Mortgage Servicing Rights (Summary Of Changes In Capitalized MSR) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	$ 144,069	$ 207,319
Reductions due to exercise of cleanup calls	(494)	(195)
Reductions due to loan payments	(18,497)	(18,164)
Changes in valuation model inputs or assumptions	(4,503)	(38,230)
Other changes in fair value	(38)	73
Fair value, ending balance	120,537	150,803
First Liens [Member]
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	140,724	203,812
Reductions due to exercise of cleanup calls	(494)	(195)
Reductions due to loan payments	(18,214)	(17,972)
Changes in valuation model inputs or assumptions	(4,503)	(38,230)
Other changes in fair value	(73)	16
Fair value, ending balance	117,440	147,431
Second Liens [Member]
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	231	262
Reductions due to exercise of cleanup calls	0	0
Reductions due to loan payments	(26)	(31)
Changes in valuation model inputs or assumptions	0	0
Other changes in fair value	0	10
Fair value, ending balance	205	241
Home Equity [Member]
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	3,114	3,245
Reductions due to exercise of cleanup calls	0	0
Reductions due to loan payments	(257)	(161)
Changes in valuation model inputs or assumptions	0	0
Other changes in fair value	35	47
Fair value, ending balance	$ 2,892	$ 3,131