Loans (Average Of Impaired Loans And Related Interest Income By Loan Portfolio Class) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Average Recorded Investment	$ 1,092	$ 4,164	$ 1,749	$ 4,021
Impaired Loans with No Allowance: Average Recorded Investment	11,285	9,355	11,121	9,717
Impaired Loans with No Allowance: Interest Income				44
Commercial and industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Average Recorded Investment		1,562	503	781
Impaired Loans with No Allowance: Average Recorded Investment	215	301	229	373
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Average Recorded Investment	1,092	1,850	804	2,837
Impaired Loans with No Allowance: Average Recorded Investment	8,676	4,684	8,049	4,598
Impaired Loans with No Allowance: Interest Income				44
Commercial real estate construction [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Average Recorded Investment			420
Impaired Loans with No Allowance: Average Recorded Investment	899	3,214	1,339	3,676
Residential mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Average Recorded Investment		752	22	403
Impaired Loans with No Allowance: Average Recorded Investment	$ 1,495	$ 1,156	$ 1,504	$ 1,070