Loans, Credit Quality Indicator (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 748,044,000	$ 747,050,000	$ 726,522,000
Loan balance for reviewing high risk loans minimum	250,000		50,000
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	49,162,000	55,684,000	54,281,000
Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	17,613,000	6,211,000	12,594,000
Commercial Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	44,950,000	53,808,000	54,052,000
Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	4,680,000	5,852,000	6,038,000
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	335,444,000	334,386,000	311,393,000
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	207,758,000	203,845,000	197,259,000
Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	49,288,000	49,057,000	49,478,000
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	26,235,000	29,778,000	29,585,000
Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	12,914,000	8,429,000	11,842,000
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	680,067,000	663,238,000
Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	44,155,000	49,947,000
Pass [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	17,584,000	6,156,000
Pass [Member] | Commercial Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	33,924,000	37,256,000
Pass [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	4,473,000	5,749,000
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	312,492,000	298,222,000
Pass [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	184,368,000	183,222,000
Pass [Member] | Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	45,078,000	45,495,000
Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	25,133,000	28,840,000
Pass [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	12,860,000	8,351,000
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	29,090,000	25,573,000
Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,780,000	1,418,000
Special Mention [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	17,000	0
Special Mention [Member] | Commercial Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,274,000	1,664,000
Special Mention [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	207,000	103,000
Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	11,487,000	9,759,000
Special Mention [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	12,517,000	11,413,000
Special Mention [Member] | Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	480,000	914,000
Special Mention [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	326,000	293,000
Special Mention [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,000	9,000
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	38,887,000	58,239,000
Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,227,000	4,319,000
Substandard [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	12,000	55,000
Substandard [Member] | Commercial Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	8,752,000	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	11,465,000	26,405,000
Substandard [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	10,873,000	9,210,000
Substandard [Member] | Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,730,000	2,648,000
Substandard [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	776,000	645,000
Substandard [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 52,000	$ 69,000