Goodwill And Other Intangible Assets (Schedule Of Other Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Goodwill [Line Items]
Gross Intangible Assets	$ 41,508	$ 41,447
Accumulated Amortization	(30,904)	(27,112)
Net Intangible Assets	10,604	14,335
Amortization expense related to intangible assets	4,387	5,125	6,537
Core Deposits [Member]
Goodwill [Line Items]
Gross Intangible Assets	34,966	34,966
Accumulated Amortization	(26,732)	(23,147)
Net Intangible Assets	8,234	11,819
Customer Relationships [Member]
Goodwill [Line Items]
Gross Intangible Assets	5,975	5,932
Accumulated Amortization	(3,862)	(3,679)
Net Intangible Assets	2,113	2,253
Non-Compete Agreements [Member]
Goodwill [Line Items]
Gross Intangible Assets	567	549
Accumulated Amortization	(310)	(286)
Net Intangible Assets	$ 257	$ 263
Maximum [Member]
Goodwill [Line Items]
Other intangible assets estimated lives, years	10
Minimum [Member]
Goodwill [Line Items]
Other intangible assets estimated lives, years	5