Goodwill And Other Intangible Assets (Schedule Of Intangible Assets With Estimable Useful Lives) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 28,922	$ 28,852
Accumulated Amortization	(23,716)	(23,159)
Valuation Allowance	(336)	(393)
Net Amount	4,870	5,300
Core Deposit Premium [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	25,720	25,720
Accumulated Amortization	(21,353)	(20,892)
Valuation Allowance	0	0
Net Amount	4,367	4,828
Mortgage Servicing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,202	3,132
Accumulated Amortization	(2,363)	(2,267)
Valuation Allowance	(336)	(393)
Net Amount	$ 503	$ 472