Loans (Average Of Impaired Loans And Related Interest Income By Loan Portfolio Class) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance, Average Recorded Investment	$ 1,476	$ 3,683	$ 6,976
Impaired Loans with Allowance, Interest Income			67
Impaired Loans with No Allowance, Average Recorded Investment	11,048	9,877	5,628
Impaired Loans with No Allowance, Interest Income	11	44	33
Commercial and industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance, Average Recorded Investment	431	1,019	904
Impaired Loans with No Allowance, Average Recorded Investment	223	349	66
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance, Average Recorded Investment	691	2,324	1,166
Impaired Loans with Allowance, Interest Income			6
Impaired Loans with No Allowance, Average Recorded Investment	8,193	4,946	3,661
Impaired Loans with No Allowance, Interest Income	11	44	29
Commercial real estate construction [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance, Average Recorded Investment	336		4,882
Impaired Loans with Allowance, Interest Income			61
Impaired Loans with No Allowance, Average Recorded Investment	1,242	3,463	562
Residential mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance, Average Recorded Investment	18	340	24
Impaired Loans with No Allowance, Average Recorded Investment	1,390	1,119	1,339
Impaired Loans with No Allowance, Interest Income			$ 4