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
	Mar. 31, 2014	Mar. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 12,828	$ 12,312
Charge-offs	(22)	(28)
Recoveries	23	54
Provision (credit)	100	250
Ending balance	12,929	12,588
Commercial, Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	3,354	3,447
Recoveries	2	9
Provision (credit)	22	(45)
Ending balance	3,378	3,411
Municipal Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	768	522
Provision (credit)	(75)	133
Ending balance	693	655
Real Estate Loans – Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	3,081	3,582
Charge-offs	(2)	(7)
Recoveries	18	3
Provision (credit)	255	130
Ending balance	3,352	3,708
Real Estate Loans – Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	5,085	4,499
Charge-offs		(1)
Recoveries		40
Provision (credit)	34	(27)
Ending balance	5,119	4,511
Real Estate Loans – Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	512	234
Recoveries		1
Provision (credit)	(152)	40
Ending balance	360	275
Installment Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	18	17
Charge-offs
Recoveries
Provision (credit)		(1)
Ending balance	18	16
All Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	10	11
Charge-offs	(20)	(20)
Recoveries	3	1
Provision (credit)	16	20
Ending balance	$ 9	$ 12