Allowance for Loan Losses, evaluated for impairment (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Ending allowance balance [Abstract]
Individually evaluated for impairment	$ 4,193		$ 4,741
Collectively evaluated for impairment	8,764		10,552
Total ending allowance balance	12,957	12,737	15,293	15,650
Ending loan balance [Abstract]
Individually evaluated for impairment	44,407		65,959
Collectively evaluated for impairment	699,736		650,402
Total Loans	744,143	747,050	716,361
Commercial [Member]
Ending allowance balance [Abstract]
Individually evaluated for impairment	551		300
Collectively evaluated for impairment	466		742
Total ending allowance balance	1,017	981	1,042	1,071
Ending loan balance [Abstract]
Individually evaluated for impairment	2,388		1,721
Collectively evaluated for impairment	48,770		53,553
Total Loans	51,158	55,684	55,274
Agricultural [Member]
Ending allowance balance [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	299		297
Total ending allowance balance	299	296	297	297
Ending loan balance [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	14,177		11,284
Total Loans	14,177	6,211	11,284
Commercial Construction [Member]
Ending allowance balance [Abstract]
Individually evaluated for impairment	1,580		2,111
Collectively evaluated for impairment	395		1,151
Total ending allowance balance	1,975	1,890	3,262	3,123
Ending loan balance [Abstract]
Individually evaluated for impairment	10,007		22,595
Collectively evaluated for impairment	42,692		33,773
Total Loans	52,699	53,808	56,368
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	8,189		4,169
Total Loans	8,189	5,852	4,169
Commercial RE [Member]
Ending allowance balance [Abstract]
Individually evaluated for impairment	1,080		1,462
Collectively evaluated for impairment	4,104		4,483
Total ending allowance balance	5,184	5,163	5,945	6,448
Ending loan balance [Abstract]
Individually evaluated for impairment	23,144		33,395
Collectively evaluated for impairment	302,173		275,541
Total Loans	325,317	334,386	308,936
Residential RE [Member]
Ending allowance balance [Abstract]
Individually evaluated for impairment	982		868
Collectively evaluated for impairment	2,430		2,842
Total ending allowance balance	3,412	3,406	3,710	3,695
Ending loan balance [Abstract]
Individually evaluated for impairment	6,591		5,951
Collectively evaluated for impairment	201,971		187,239
Total Loans	208,562	203,845	193,190
Farmland [Member]
Ending allowance balance [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	306		331
Total ending allowance balance	306	291	331	365
Ending loan balance [Abstract]
Individually evaluated for impairment	2,277		2,277
Collectively evaluated for impairment	47,521		46,471
Total Loans	49,798	49,057	48,748
Consumer [Member]
Ending allowance balance [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	273		253
Total ending allowance balance	273	228	253	205
Ending loan balance [Abstract]
Individually evaluated for impairment	0		20
Collectively evaluated for impairment	27,439		29,632
Total Loans	27,439	29,778	29,652
Other [Member]
Ending allowance balance [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	353		315
Total ending allowance balance	353	344	315	308
Ending loan balance [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	6,804		8,740
Total Loans	$ 6,804	$ 8,429	$ 8,740