Mortgage Servicing Rights (Summary Of Changes In Capitalized MSR) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	$ 144,069	$ 207,319
Reductions due to exercise of cleanup calls		(195)
Reductions due to loan payments	(12,335)	(12,807)
Changes in valuation model inputs or assumptions	(2,396)	(7,418)
Other changes in fair value	(47)	59
Fair value, ending balance	129,291	186,958
First Liens [Member]
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	140,724	203,812
Reductions due to exercise of cleanup calls		(195)
Reductions due to loan payments	(12,164)	(12,685)
Changes in valuation model inputs or assumptions	(2,396)	(7,418)
Other changes in fair value	(79)	16
Fair value, ending balance	126,085	183,530
Second Liens [Member]
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	231	262
Reductions due to exercise of cleanup calls		0
Reductions due to loan payments	(16)	(21)
Changes in valuation model inputs or assumptions	0	0
Other changes in fair value	0	10
Fair value, ending balance	215	251
HELOC [Member]
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	3,114	3,245
Reductions due to exercise of cleanup calls		0
Reductions due to loan payments	(155)	(101)
Changes in valuation model inputs or assumptions	0	0
Other changes in fair value	32	33
Fair value, ending balance	$ 2,991	$ 3,177