Mortgage Servicing Rights (Summary Of Changes In Capitalized MSR) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	$ 114,311	$ 144,069
Reductions due to loan payments	(17,397)	(18,497)
Reductions due to exercise of cleanup calls	(495)	(494)
Changes in fair value due to:
Changes in valuation model inputs or assumptions	20,267	(4,503)
Other changes in fair value	0	(38)
Fair value, ending balance	116,686	120,537
First Liens [Member]
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	111,314	140,724
Reductions due to loan payments	(16,980)	(18,214)
Reductions due to exercise of cleanup calls	(495)	(494)
Changes in fair value due to:
Changes in valuation model inputs or assumptions	20,267	(4,503)
Other changes in fair value	(89)	(73)
Fair value, ending balance	114,017	117,440
Second Liens [Member]
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	196	231
Reductions due to loan payments	(75)	(26)
Reductions due to exercise of cleanup calls	0	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	166	205
Home Equity [Member]
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	2,801	3,114
Reductions due to loan payments	(342)	(257)
Reductions due to exercise of cleanup calls	0	0
Changes in fair value due to:
Changes in valuation model inputs or assumptions	0	0
Other changes in fair value	44	35
Fair value, ending balance	$ 2,503	$ 2,892