Goodwill And Other Intangible Assets (Schedule Of Changes In Carrying Amount Of Goodwill And Net Other Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Goodwill [Roll Forward]
Amortization	$ (2,500)	$ (3,000)	$ (3,500)
Goodwill [Member]
Goodwill [Roll Forward]
Balance, beginning	125,585	125,585
Originations	0	0
Amortization	0	0
Impairment reversal	0	0
Balance, ending	125,585	125,585
Core Deposit Premium [Member]
Goodwill [Roll Forward]
Balance, beginning	6,970	9,612
Originations	0	0
Amortization	(2,142)	(2,642)
Impairment reversal	0	0
Balance, ending	4,828	6,970
Mortgage Servicing Rights [Member]
Goodwill [Roll Forward]
Balance, beginning	744	1,325
Originations	35	15
Amortization	(341)	(354)
Impairment reversal	34	(242)
Balance, ending	$ 472	$ 744