Credit Quality of Loans and Allowance for Loan Losses (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Loans Credit Quality Indicators
Total	$ 516,934	$ 496,542	$ 521,626
Pass [Member]
Loans Credit Quality Indicators
Total	274,302	249,713
Weak Pass [Member]
Loans Credit Quality Indicators
Total	161,014	163,767
Special Mention [Member]
Loans Credit Quality Indicators
Total	43,323	43,098
Substandard [Member]
Loans Credit Quality Indicators
Total	38,295	39,964
Real Estate Construction and Land Development [Member]
Loans Credit Quality Indicators
Total	65,707	67,127	71,174
Real Estate Construction and Land Development [Member] | Pass [Member]
Loans Credit Quality Indicators
Total	30,600	27,833
Real Estate Construction and Land Development [Member] | Weak Pass [Member]
Loans Credit Quality Indicators
Total	21,382	23,237
Real Estate Construction and Land Development [Member] | Special Mention [Member]
Loans Credit Quality Indicators
Total	5,007	4,853
Real Estate Construction and Land Development [Member] | Substandard [Member]
Loans Credit Quality Indicators
Total	8,718	11,204
Real Estate Secured by Farmland [Member]
Loans Credit Quality Indicators
Total	28,030	29,890	31,782
Real Estate Secured by Farmland [Member] | Pass [Member]
Loans Credit Quality Indicators
Total	21,645	22,008
Real Estate Secured by Farmland [Member] | Weak Pass [Member]
Loans Credit Quality Indicators
Total	3,552	4,430
Real Estate Secured by Farmland [Member] | Special Mention [Member]
Loans Credit Quality Indicators
Total	2,475	3,452
Real Estate Secured by Farmland [Member] | Substandard [Member]
Loans Credit Quality Indicators
Total	358
Real Estate Secured by Residential Properties [Member]
Loans Credit Quality Indicators
Total	106,456	110,374	117,824
Real Estate Secured by Residential Properties [Member] | Pass [Member]
Loans Credit Quality Indicators
Total	59,262	60,121
Real Estate Secured by Residential Properties [Member] | Weak Pass [Member]
Loans Credit Quality Indicators
Total	29,163	31,146
Real Estate Secured by Residential Properties [Member] | Special Mention [Member]
Loans Credit Quality Indicators
Total	8,959	12,302
Real Estate Secured by Residential Properties [Member] | Substandard [Member]
Loans Credit Quality Indicators
Total	9,072	6,805
Real Estate Secured by Nonfarm Nonresidential [Member]
Loans Credit Quality Indicators
Total	204,963	203,063	211,479
Real Estate Secured by Nonfarm Nonresidential [Member] | Pass [Member]
Loans Credit Quality Indicators
Total	92,020	90,099
Real Estate Secured by Nonfarm Nonresidential [Member] | Weak Pass [Member]
Loans Credit Quality Indicators
Total	73,081	75,384
Real Estate Secured by Nonfarm Nonresidential [Member] | Special Mention [Member]
Loans Credit Quality Indicators
Total	20,767	18,663
Real Estate Secured by Nonfarm Nonresidential [Member] | Substandard [Member]
Loans Credit Quality Indicators
Total	19,095	18,917
Consumer Installment [Member]
Loans Credit Quality Indicators
Total	6,077	6,620	5,354
Consumer Installment [Member] | Pass [Member]
Loans Credit Quality Indicators
Total	3,892	4,025
Consumer Installment [Member] | Weak Pass [Member]
Loans Credit Quality Indicators
Total	1,830	2,212
Consumer Installment [Member] | Special Mention [Member]
Loans Credit Quality Indicators
Total	288	254
Consumer Installment [Member] | Substandard [Member]
Loans Credit Quality Indicators
Total	67	129
Credit Cards and Related Plans [Member]
Loans Credit Quality Indicators
Total	1,555	1,661	2,231
Credit Cards and Related Plans [Member] | Pass [Member]
Loans Credit Quality Indicators
Total	795	850
Credit Cards and Related Plans [Member] | Weak Pass [Member]
Loans Credit Quality Indicators
Total	528	529
Credit Cards and Related Plans [Member] | Special Mention [Member]
Loans Credit Quality Indicators
Total	230	279
Credit Cards and Related Plans [Member] | Substandard [Member]
Loans Credit Quality Indicators
Total	2	3
Commercial and Industrial [Member]
Loans Credit Quality Indicators
Total	60,905	45,679	44,201
Commercial and Industrial [Member] | Pass [Member]
Loans Credit Quality Indicators
Total	34,054	25,133
Commercial and Industrial [Member] | Weak Pass [Member]
Loans Credit Quality Indicators
Total	20,698	16,146
Commercial and Industrial [Member] | Special Mention [Member]
Loans Credit Quality Indicators
Total	5,170	2,686
Commercial and Industrial [Member] | Substandard [Member]
Loans Credit Quality Indicators
Total	983	1,714
Loans to Finance Agricultural Production [Member]
Loans Credit Quality Indicators
Total	33,194	21,539	20,910
Loans to Finance Agricultural Production [Member] | Pass [Member]
Loans Credit Quality Indicators
Total	26,374	16,473
Loans to Finance Agricultural Production [Member] | Weak Pass [Member]
Loans Credit Quality Indicators
Total	6,416	3,290
Loans to Finance Agricultural Production [Member] | Special Mention [Member]
Loans Credit Quality Indicators
Total	404	584
Loans to Finance Agricultural Production [Member] | Substandard [Member]
Loans Credit Quality Indicators
Total		1,192
All Other Loans [Member]
Loans Credit Quality Indicators
Total	10,047	10,589	16,671
All Other Loans [Member] | Pass [Member]
Loans Credit Quality Indicators
Total	5,660	3,171
All Other Loans [Member] | Weak Pass [Member]
Loans Credit Quality Indicators
Total	4,364	7,393
All Other Loans [Member] | Special Mention [Member]
Loans Credit Quality Indicators
Total	23	25
All Other Loans [Member] | Substandard [Member]
Loans Credit Quality Indicators
Total