Loans And The Allowance For Credit Losses (Loan Loss Experience And Activity In The Allowance For Credit Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 12,658	$ 11,817	$ 12,312	$ 11,353
Charge-offs	(85)	0	(237)	(29)
Recoveries	18	13	116	56
Provision (credit)	400	250	800	700
Ending balance	12,991	12,080	12,991	12,080
Commercial, Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	3,274	3,102	3,447	2,905
Charge-offs	0	0	0	(9)
Recoveries	13	3	62	21
Provision (credit)	137	136	(85)	324
Ending balance	3,424	3,241	3,424	3,241
Municipal Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	400	410	522	309
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision (credit)	346	31	224	132
Ending balance	746	441	746	441
Real Estate Loans – Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	3,385	3,357	3,421	3,017
Charge-offs	(49)	0	(152)	(20)
Recoveries	0	1	4	13
Provision (credit)	(192)	75	(129)	423
Ending balance	3,144	3,433	3,144	3,433
Real Estate Loans – Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	5,018	4,676	4,660	4,605
Charge-offs	0	0	(1)	0
Recoveries	0	1	40	1
Provision (credit)	100	13	419	84
Ending balance	5,118	4,690	5,118	4,690
Real Estate Loans – Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	551	233	234	477
Charge-offs	0	0	0	0
Recoveries	1	8	2	21
Provision (credit)	(19)	(10)	297	(267)
Ending balance	533	231	533	231
Installment Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	21	21	17	23
Charge-offs	(9)	0	(9)	0
Recoveries	0	0	0	0
Provision (credit)	6	(2)	10	(4)
Ending balance	18	19	18	19
All Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	9	18	11	17
Charge-offs	(27)	0	(75)	0
Recoveries	4	0	8	0
Provision (credit)	22	7	64	8
Ending balance	$ 8	$ 25	$ 8	$ 25