Loans (Summary Of Loan Balances and Allowance For Loan Losses) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Financing Receivable, Recorded Investment [Line Items]
Loans: Individually Evaluated	$ 7,429	$ 7,864
Loans: Collectively Evaluated	676,481	700,451
Loans: Totals	683,910	708,315
Allowance for Loan Losses: Individually Evaluated	623	1,126
Allowance for Loan Losses: Collectively Evaluated	5,793	6,145
Allowance for Loan Losses: Totals	6,857	7,705	9,107	8,265
Residential mortgage loans - first liens [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans: Individually Evaluated	2,341	2,227
Loans: Collectively Evaluated	309,286	328,788
Loans: Totals	311,627	331,015
Allowance for Loan Losses: Individually Evaluated	206	461
Allowance for Loan Losses: Collectively Evaluated	2,413	2,565
Allowance for Loan Losses: Totals	2,619	3,026	2,745
Residential mortgage loans - junior liens [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans: Individually Evaluated	158	137
Loans: Collectively Evaluated	26,590	28,714
Loans: Totals	26,748	28,851
Allowance for Loan Losses: Individually Evaluated	0	11
Allowance for Loan Losses: Collectively Evaluated	247	255
Allowance for Loan Losses: Totals	247	266	334
Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans: Individually Evaluated	0	93
Loans: Collectively Evaluated	33,017	29,944
Loans: Totals	33,017	30,037
Allowance for Loan Losses: Individually Evaluated	0	0
Allowance for Loan Losses: Collectively Evaluated	255	231
Allowance for Loan Losses: Totals	255	231	218
1-4 Family residential construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans: Individually Evaluated	0	0
Loans: Collectively Evaluated	12,842	9,959
Loans: Totals	12,842	9,959
Allowance for Loan Losses: Individually Evaluated	0	0
Allowance for Loan Losses: Collectively Evaluated	96	79
Allowance for Loan Losses: Totals	96	79	208
Total residential mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans: Individually Evaluated	2,499	2,457
Loans: Collectively Evaluated	381,735	397,405
Loans: Totals	384,234	399,862
Allowance for Loan Losses: Individually Evaluated	206	472
Allowance for Loan Losses: Collectively Evaluated	3,011	3,130
Allowance for Loan Losses: Totals	3,217	3,602	3,505
Commercial loans secured by real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans: Individually Evaluated	1,938	2,169
Loans: Collectively Evaluated	156,475	154,219
Loans: Totals	158,413	156,388
Allowance for Loan Losses: Individually Evaluated	146	169
Allowance for Loan Losses: Collectively Evaluated	1,784	1,835
Allowance for Loan Losses: Totals	1,930	2,004	3,314
Commercial and industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans: Individually Evaluated	939	942
Loans: Collectively Evaluated	47,503	56,249
Loans: Totals	48,442	57,191
Allowance for Loan Losses: Individually Evaluated	197	361
Allowance for Loan Losses: Collectively Evaluated	384	585
Allowance for Loan Losses: Totals	581	946	862
Political subdivisions [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans: Individually Evaluated	0	0
Loans: Collectively Evaluated	31,789	37,620
Loans: Totals	31,789	37,620
Allowance for Loan Losses: Individually Evaluated	0	0
Allowance for Loan Losses: Collectively Evaluated	0	0
Allowance for Loan Losses: Totals	0	0	0
Commercial construction and land [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans: Individually Evaluated	1,034	1,266
Loans: Collectively Evaluated	27,166	22,252
Loans: Totals	28,200	23,518
Allowance for Loan Losses: Individually Evaluated	0	65
Allowance for Loan Losses: Collectively Evaluated	234	202
Allowance for Loan Losses: Totals	234	267	590
Loans secured by farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans: Individually Evaluated	923	927
Loans: Collectively Evaluated	10,480	10,022
Loans: Totals	11,403	10,949
Allowance for Loan Losses: Individually Evaluated	34	35
Allowance for Loan Losses: Collectively Evaluated	95	91
Allowance for Loan Losses: Totals	129	126	139
Multi-family (5 or more) residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans: Individually Evaluated	9	14
Loans: Collectively Evaluated	6,736	6,569
Loans: Totals	6,745	6,583
Allowance for Loan Losses: Individually Evaluated	0	0
Allowance for Loan Losses: Collectively Evaluated	67	66
Allowance for Loan Losses: Totals	67	66	63
Agricultural loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans: Individually Evaluated	40	39
Loans: Collectively Evaluated	3,013	2,948
Loans: Totals	3,053	2,987
Allowance for Loan Losses: Individually Evaluated	0	0
Allowance for Loan Losses: Collectively Evaluated	27	27
Allowance for Loan Losses: Totals	27	27	32
Other commercial loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans: Individually Evaluated	0	0
Loans: Collectively Evaluated	362	552
Loans: Totals	362	552
Allowance for Loan Losses: Individually Evaluated	0	0
Allowance for Loan Losses: Collectively Evaluated	3	5
Allowance for Loan Losses: Totals	3	5	0
Total commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans: Individually Evaluated	4,883	5,357
Loans: Collectively Evaluated	283,524	290,431
Loans: Totals	288,407	295,788
Allowance for Loan Losses: Individually Evaluated	377	630
Allowance for Loan Losses: Collectively Evaluated	2,594	2,811
Allowance for Loan Losses: Totals	2,971	3,441	5,000
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans: Individually Evaluated	47	50
Loans: Collectively Evaluated	11,222	12,615
Loans: Totals	11,269	12,665
Allowance for Loan Losses: Individually Evaluated	40	24
Allowance for Loan Losses: Collectively Evaluated	188	204
Allowance for Loan Losses: Totals	228	228	289
Unallocated [Member]
Financing Receivable, Recorded Investment [Line Items]
Allowance for Loan Losses: Totals	$ 441	$ 434	$ 313