Allowance for Loan Losses, evaluated for impairment (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Ending allowance balance [Abstract]
Individually evaluated for impairment	$ 3,216		$ 4,214
Collectively evaluated for impairment	9,735		10,175
Total ending allowance balance	12,951	12,737	14,389	15,650
Ending loan balance [Abstract]
Individually evaluated for impairment	42,518		64,648
Collectively evaluated for impairment	705,526		661,874
Total Loans	748,044	747,050	726,522
Commercial [Member]
Ending allowance balance [Abstract]
Individually evaluated for impairment	108		514
Collectively evaluated for impairment	914		408
Total ending allowance balance	1,022	981	922	1,071
Ending loan balance [Abstract]
Individually evaluated for impairment	1,555		1,701
Collectively evaluated for impairment	47,607		52,580
Total Loans	49,162	55,684	54,281
Agricultural [Member]
Ending allowance balance [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	297		294
Total ending allowance balance	297	296	294	297
Ending loan balance [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	17,613		12,594
Total Loans	17,613	6,211	12,594
Commercial Construction [Member]
Ending allowance balance [Abstract]
Individually evaluated for impairment	573		1,786
Collectively evaluated for impairment	1,332		318
Total ending allowance balance	1,905	1,890	2,104	3,123
Ending loan balance [Abstract]
Individually evaluated for impairment	7,702		18,743
Collectively evaluated for impairment	37,248		35,309
Total Loans	44,950	53,808	54,052
Residential Construction [Member]
Ending allowance balance [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	138		138
Total ending allowance balance	138	138	138	138
Ending loan balance [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	4,680		6,038
Total Loans	4,680	5,852	6,038
Commercial Real Estate [Member]
Ending allowance balance [Abstract]
Individually evaluated for impairment	1,559		864
Collectively evaluated for impairment	3,709		5,693
Total ending allowance balance	5,268	5,163	6,557	6,448
Ending loan balance [Abstract]
Individually evaluated for impairment	22,729		34,165
Collectively evaluated for impairment	312,715		277,228
Total Loans	335,444	334,386	311,393
Residential Real Estate [Member]
Ending allowance balance [Abstract]
Individually evaluated for impairment	774		1,050
Collectively evaluated for impairment	2,606		2,435
Total ending allowance balance	3,380	3,406	3,485	3,695
Ending loan balance [Abstract]
Individually evaluated for impairment	6,949		7,751
Collectively evaluated for impairment	200,809		189,508
Total Loans	207,758	203,845	197,259
Farmland [Member]
Ending allowance balance [Abstract]
Individually evaluated for impairment	202		0
Collectively evaluated for impairment	109		331
Total ending allowance balance	311	291	331	365
Ending loan balance [Abstract]
Individually evaluated for impairment	3,583		2,277
Collectively evaluated for impairment	45,705		47,201
Total Loans	49,288	49,057	49,478
Consumer [Member]
Ending allowance balance [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	277		253
Total ending allowance balance	277	228	253	205
Ending loan balance [Abstract]
Individually evaluated for impairment	0		11
Collectively evaluated for impairment	26,235		29,574
Total Loans	26,235	29,778	29,585
Other [Member]
Ending allowance balance [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	353		305
Total ending allowance balance	353	344	305	308
Ending loan balance [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	12,914		11,842
Total Loans	$ 12,914	$ 8,429	$ 11,842