Loans (Impaired Loans By Loan Portfolio Class) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Recorded Investment	$ 853	$ 2,328
Impaired Loans with Allowance: Unpaid Principal Balance	892	3,463
Impaired Loans with Allowance: Related Allowance	15	1,181
Impaired Loans with No Allowance: Recorded Investment	11,297	10,518
Impaired Loans with No Allowance: Unpaid Principal Balance	13,478	17,333
Commercial and industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Recorded Investment		1,967
Impaired Loans with Allowance: Unpaid Principal Balance		3,102
Impaired Loans with Allowance: Related Allowance		1,085
Impaired Loans with No Allowance: Recorded Investment	209	252
Impaired Loans with No Allowance: Unpaid Principal Balance	1,323	1,367
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Recorded Investment	853	273
Impaired Loans with Allowance: Unpaid Principal Balance	892	273
Impaired Loans with Allowance: Related Allowance	15	43
Impaired Loans with No Allowance: Recorded Investment	8,719	6,339
Impaired Loans with No Allowance: Unpaid Principal Balance	9,163	7,136
Commercial real estate construction [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	877	2,614
Impaired Loans with No Allowance: Unpaid Principal Balance	1,151	7,192
Residential mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Recorded Investment		88
Impaired Loans with Allowance: Unpaid Principal Balance		88
Impaired Loans with Allowance: Related Allowance		53
Impaired Loans with No Allowance: Recorded Investment	1,492	1,313
Impaired Loans with No Allowance: Unpaid Principal Balance	$ 1,841	$ 1,638