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, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 12,906	$ 12,658	$ 12,828	$ 12,312
Charge-offs	(55)	(85)	(158)	(237)
Recoveries	7	18	38	116
Provision (credit)	0	400	150	800
Ending balance	12,858	12,991	12,858	12,991
Commercial, Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	3,656	3,274	3,354	3,447
Charge-offs			(34)
Recoveries		13	3	62
Provision (credit)	(253)	137	80	(85)
Ending balance	3,403	3,424	3,403	3,424
Municipal Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	386	400	768	522
Provision (credit)	316	346	(66)	224
Ending balance	702	746	702	746
Real Estate Loans – Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	3,246	3,385	3,081	3,421
Charge-offs	(7)	(49)	(25)	(152)
Recoveries			20	4
Provision (credit)	42	(192)	205	(129)
Ending balance	3,281	3,144	3,281	3,144
Real Estate Loans – Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	5,089	5,018	5,085	4,660
Charge-offs				(1)
Recoveries				40
Provision (credit)	(45)	100	(41)	419
Ending balance	5,044	5,118	5,044	5,118
Real Estate Loans – Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	494	551	512	234
Recoveries		1		2
Provision (credit)	(94)	(19)	(112)	297
Ending balance	400	533	400	533
Installment Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	18	21	18	17
Charge-offs		(9)		(9)
Recoveries			1
Provision (credit)	(2)	6	(3)	10
Ending balance	16	18	16	18
All Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	17	9	10	11
Charge-offs	(48)	(27)	(99)	(75)
Recoveries	7	4	14	8
Provision (credit)	36	22	87	64
Ending balance	$ 12	$ 8	$ 12	$ 8