Loans and Related Allowace for Credit Losses (Impaired Loans by Loan Portfolio Class) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Recorded Investment, Total	$ 8,949	$ 9,539
Unpaid Principal Balance, Total	8,949	9,539
Related Allowance, Total	1,866	775
Commercial, financial and agricultural [Member]
Impaired Loans with No Allowance: Recorded Investment	197	238
Impaired Loans with No Allowance: Unpaid Principal Balance	197	238
Recorded Investment, Total	197	238
Unpaid Principal Balance, Total	197	238
Real estate - commercial [Member]
Impaired Loans with No Allowance: Recorded Investment	2,747	2,312
Impaired Loans with No Allowance: Unpaid Principal Balance	2,747	2,312
Recorded Investment, Total	2,747	2,312
Unpaid Principal Balance, Total	2,747	2,312
Real estate - construction [Member]
Impaired Loans with No Allowance: Recorded Investment	1,297	720
Impaired Loans with No Allowance: Unpaid Principal Balance	1,297	720
Impaired Loans with Allowance: Recorded Investment	1,114	1,150
Impaired Loans with Allowance: Unpaid Principal Balance	1,114	1,150
Impaired Loans with Allowance: Related Allowance	295	343
Recorded Investment, Total	2,411	1,870
Unpaid Principal Balance, Total	2,411	1,870
Related Allowance, Total	295	343
Real estate - mortgage
Impaired Loans with No Allowance: Recorded Investment	541	2,254
Impaired Loans with No Allowance: Unpaid Principal Balance	541	2,254
Impaired Loans with Allowance: Recorded Investment	3,053	2,865
Impaired Loans with Allowance: Unpaid Principal Balance	3,053	2,865
Impaired Loans with Allowance: Related Allowance	1,571	432
Recorded Investment, Total	3,594	5,119
Unpaid Principal Balance, Total	3,594	5,119
Related Allowance, Total	$ 1,571	$ 432