Loans, Past Due (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Financing Receivable, Recorded Investment, Aging [Abstract]
Accruing Loans 30 to 89 Days Past Dues	$ 11,331	$ 14,912
Accruing Loans 90 Days or More Past Due	0	4
Total Accruing Loans Past Due	11,331	14,916
Nonaccrual Loans	20,439	29,851
Current Loans	705,050	702,283
Total Loans	736,820	747,050	706,513
Commercial [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Accruing Loans 30 to 89 Days Past Dues	604	798
Accruing Loans 90 Days or More Past Due	0	0
Total Accruing Loans Past Due	604	798
Nonaccrual Loans	33	1,033
Current Loans	52,269	53,853
Total Loans	52,906	55,684
Agricultural [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Accruing Loans 30 to 89 Days Past Dues	0	28
Accruing Loans 90 Days or More Past Due	0	0
Total Accruing Loans Past Due	0	28
Nonaccrual Loans	39	39
Current Loans	7,817	6,144
Total Loans	7,856	6,211	8,848
Commercial Construction [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Accruing Loans 30 to 89 Days Past Dues	1,498	1,310
Accruing Loans 90 Days or More Past Due	0	0
Total Accruing Loans Past Due	1,498	1,310
Nonaccrual Loans	9,652	14,032
Current Loans	40,944	38,466
Total Loans	52,094	53,808	56,420
Residential Construction [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Accruing Loans 30 to 89 Days Past Dues	0	0
Accruing Loans 90 Days or More Past Due	0	0
Total Accruing Loans Past Due	0	0
Nonaccrual Loans	0	0
Current Loans	7,570	5,852
Total Loans	7,570	5,852	3,224
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Accruing Loans 30 to 89 Days Past Dues	3,691	3,771
Accruing Loans 90 Days or More Past Due	0	0
Total Accruing Loans Past Due	3,691	3,771
Nonaccrual Loans	3,761	6,630
Current Loans	321,400	323,985
Total Loans	328,852	334,386	300,389
Residential [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Accruing Loans 30 to 89 Days Past Dues	3,426	8,223
Accruing Loans 90 Days or More Past Due	0	0
Total Accruing Loans Past Due	3,426	8,223
Nonaccrual Loans	4,189	5,430
Current Loans	197,043	190,192
Total Loans	204,658	203,845
Farmland [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Accruing Loans 30 to 89 Days Past Dues	1,460	140
Accruing Loans 90 Days or More Past Due	0	0
Total Accruing Loans Past Due	1,460	140
Nonaccrual Loans	2,548	2,413
Current Loans	44,200	46,504
Total Loans	48,208	49,057	48,008
Consumer [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Accruing Loans 30 to 89 Days Past Dues	652	637
Accruing Loans 90 Days or More Past Due	0	4
Total Accruing Loans Past Due	652	641
Nonaccrual Loans	217	256
Current Loans	27,510	28,881
Total Loans	28,379	29,778
Other [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Accruing Loans 30 to 89 Days Past Dues	0	5
Accruing Loans 90 Days or More Past Due	0	0
Total Accruing Loans Past Due	0	5
Nonaccrual Loans	0	18
Current Loans	6,297	8,406
Total Loans	$ 6,297	$ 8,429