Loans (Impaired Loans By Loan Portfolio Class) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance, Recorded Investment	$ 383	$ 2,328
Impaired Loans with Allowance, Unpaid Principal Balance	422	3,463
Impaired Loans with Allowance, Related Allowance	36	1,181
Impaired Loans with No Allowance, Recorded Investment	10,759	10,518
Impaired Loans with No Allowance, Unpaid Principal Balance	12,917	17,333
Commercial and industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance, Recorded Investment	146	1,967
Impaired Loans with Allowance, Unpaid Principal Balance	146	3,102
Impaired Loans with Allowance, Related Allowance	29	1,085
Impaired Loans with No Allowance, Recorded Investment	195	252
Impaired Loans with No Allowance, Unpaid Principal Balance	1,310	1,367
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance, Recorded Investment	237	273
Impaired Loans with Allowance, Unpaid Principal Balance	276	273
Impaired Loans with Allowance, Related Allowance	7	43
Impaired Loans with No Allowance, Recorded Investment	8,772	6,339
Impaired Loans with No Allowance, Unpaid Principal Balance	9,216	7,136
Commercial real estate construction [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance, Recorded Investment	854	2,614
Impaired Loans with No Allowance, Unpaid Principal Balance	1,128	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	938	1,313
Impaired Loans with No Allowance, Unpaid Principal Balance	$ 1,263	$ 1,638