Loans, Credit Quality Indicator (Details) (USD $)	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 744,143,000	$ 747,050,000	$ 716,361,000
Loan balance for reviewing high risk loans minimum	250,000	50,000
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	51,158,000	55,684,000	55,274,000
Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	14,177,000	6,211,000	11,284,000
Commercial Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	52,699,000	53,808,000	56,368,000
Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	8,189,000	5,852,000	4,169,000
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	325,317,000	334,386,000	308,936,000
Residential RE [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	208,562,000	203,845,000	193,190,000
Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	49,798,000	49,057,000	48,748,000
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	27,439,000	29,778,000	29,652,000
Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	6,804,000	8,429,000	8,740,000
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	673,363,000	663,238,000
Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	45,294,000	49,947,000
Pass [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	14,148,000	6,156,000
Pass [Member] | Commercial Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	40,316,000	37,256,000
Pass [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	7,981,000	5,749,000
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	301,651,000	298,222,000
Pass [Member] | Residential RE [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	185,643,000	183,222,000
Pass [Member] | Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	45,293,000	45,495,000
Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	26,309,000	28,840,000
Pass [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	6,728,000	8,351,000
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	29,196,000	25,573,000
Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,778,000	1,418,000
Special Mention [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	16,000	0
Special Mention [Member] | Commercial Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,128,000	1,664,000
Special Mention [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	208,000	103,000
Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	10,783,000	9,759,000
Special Mention [Member] | Residential RE [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	13,184,000	11,413,000
Special Mention [Member] | Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	711,000	914,000
Special Mention [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	385,000	293,000
Special Mention [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,000	9,000
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	41,584,000	58,239,000
Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	4,086,000	4,319,000
Substandard [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	13,000	55,000
Substandard [Member] | Commercial Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	10,255,000	14,888,000
Substandard [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	12,883,000	26,405,000
Substandard [Member] | Residential RE [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	9,735,000	9,210,000
Substandard [Member] | Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,794,000	2,648,000
Substandard [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	745,000	645,000
Substandard [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 73,000	$ 69,000