Mortgage Servicing Rights (Summary Of Changes In Capitalized MSR) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	$ 144,069	$ 207,319
Reductions due to loan payments	(5,584)	(7,218)
Changes in valuation model inputs or assumptions	4,459	7,592
Other changes in fair value	12	55
Fair value, ending balance	142,956	207,748
First Liens [Member]
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	140,724	203,812
Reductions due to loan payments	(5,499)	(7,163)
Changes in valuation model inputs or assumptions	4,459	7,592
Other changes in fair value	(8)	16
Fair value, ending balance	139,676	204,257
Second Liens [Member]
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	231	262
Reductions due to loan payments	(9)	(13)
Other changes in fair value		10
Fair value, ending balance	222	259
HELOC [Member]
Participating Mortgage Loans [Line Items]
Fair value, beginning balance	3,114	3,245
Reductions due to loan payments	(76)	(42)
Other changes in fair value	20	29
Fair value, ending balance	$ 3,058	$ 3,232