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		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 12,588	$ 11,632	$ 12,312	$ 11,353
Charge-offs	(124)	(29)	(152)	(29)
Recoveries	44	14	98	43
Provision (credit)	150	200	400	450
Ending balance	12,658	11,817	12,658	11,817
Commercial, Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	3,411	2,733	3,447	2,905
Charge-offs	0	(9)	0	(9)
Recoveries	40	(2)	49	18
Provision (credit)	(177)	380	(222)	188
Ending balance	3,274	3,102	3,274	3,102
Municipal Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	655	542	522	309
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision (credit)	(255)	(132)	(122)	101
Ending balance	400	410	400	410
Real Estate Loans – Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	3,708	3,374	3,582	3,138
Charge-offs	(96)	(20)	(103)	(20)
Recoveries	1	12	4	12
Provision (credit)	(52)	110	78	346
Ending balance	3,561	3,476	3,561	3,476
Real Estate Loans – Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	4,511	4,684	4,499	4,484
Charge-offs	0	0	(1)	0
Recoveries	0	(1)	40	0
Provision (credit)	331	(126)	304	73
Ending balance	4,842	4,557	4,842	4,557
Real Estate Loans – Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	275	280	234	477
Charge-offs	0	0	0	0
Recoveries	0	5	1	13
Provision (credit)	276	(52)	316	(257)
Ending balance	551	233	551	233
Installment Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	16	18	17	23
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision (credit)	5	3	4	(2)
Ending balance	21	21	21	21
All Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	12	1	11	17
Charge-offs	(28)	0	(48)	0
Recoveries	3	0	4	0
Provision (credit)	22	17	42	1
Ending balance	$ 9	$ 18	$ 9	$ 18