Mortgage Servicing Rights (Summary Of Changes In Capitalized MSR) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	$ 114,311	$ 144,069
Reductions due to loan payments	(11,298)	(12,335)
Reductions due to exercise of cleanup calls	(495)
Changes in fair value due to:
Changes in valuation model inputs or assumptions	11,330	(2,396)
Other changes in fair value	5	(47)
Fair value, ending balance	113,853	129,291
First Liens [Member]
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	111,314	140,724
Reductions due to loan payments	(10,991)	(12,164)
Reductions due to exercise of cleanup calls	(495)
Changes in fair value due to:
Changes in valuation model inputs or assumptions	11,330	(2,396)
Other changes in fair value	(82)	(79)
Fair value, ending balance	111,076	126,085
Second Liens [Member]
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	196	231
Reductions due to loan payments	(69)	(16)
Reductions due to exercise of cleanup calls	0
Changes in fair value due to:
Changes in valuation model inputs or assumptions	0	0
Other changes in fair value	45	0
Fair value, ending balance	172	215
Home Equity [Member]
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	2,801	3,114
Reductions due to loan payments	(238)	(155)
Reductions due to exercise of cleanup calls	0
Changes in fair value due to:
Changes in valuation model inputs or assumptions	0	0
Other changes in fair value	42	32
Fair value, ending balance	$ 2,605	$ 2,991