Credit Quality of Loans and Allowance for Loan Losses (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Loans Credit Quality Indicators
Total	$ 506,257	$ 496,542	$ 542,687
Pass [Member]
Loans Credit Quality Indicators
Total	265,723	249,713
Weak Pass [Member]
Loans Credit Quality Indicators
Total	158,294	163,767
Special Mention [Member]
Loans Credit Quality Indicators
Total	43,023	43,098
Substandard [Member]
Loans Credit Quality Indicators
Total	39,217	39,964
Real estate-construction and land development
Loans Credit Quality Indicators
Total	62,944	67,127	84,291
Real estate-construction and land development | Pass [Member]
Loans Credit Quality Indicators
Total	27,929	27,833
Real estate-construction and land development | Weak Pass [Member]
Loans Credit Quality Indicators
Total	19,992	23,237
Real estate-construction and land development | Special Mention [Member]
Loans Credit Quality Indicators
Total	5,682	4,853
Real estate-construction and land development | Substandard [Member]
Loans Credit Quality Indicators
Total	9,341	11,204
Real Estate Secured by Farmland [Member]
Loans Credit Quality Indicators
Total	27,627	29,890	33,641
Real Estate Secured by Farmland [Member] | Pass [Member]
Loans Credit Quality Indicators
Total	21,265	22,008
Real Estate Secured by Farmland [Member] | Weak Pass [Member]
Loans Credit Quality Indicators
Total	3,326	4,430
Real Estate Secured by Farmland [Member] | Special Mention [Member]
Loans Credit Quality Indicators
Total	2,680	3,452
Real Estate Secured by Farmland [Member] | Substandard [Member]
Loans Credit Quality Indicators
Total	356
Real Estate Secured by Residential Properties [Member]
Loans Credit Quality Indicators
Total	107,695	110,374	117,458
Real Estate Secured by Residential Properties [Member] | Pass [Member]
Loans Credit Quality Indicators
Total	59,344	60,121
Real Estate Secured by Residential Properties [Member] | Weak Pass [Member]
Loans Credit Quality Indicators
Total	29,079	31,146
Real Estate Secured by Residential Properties [Member] | Special Mention [Member]
Loans Credit Quality Indicators
Total	10,488	12,302
Real Estate Secured by Residential Properties [Member] | Substandard [Member]
Loans Credit Quality Indicators
Total	8,784	6,805
Real Estate Secured by Nonfarm Nonresidential [Member]
Loans Credit Quality Indicators
Total	198,007	203,063	211,556
Real Estate Secured by Nonfarm Nonresidential [Member] | Pass [Member]
Loans Credit Quality Indicators
Total	87,857	90,999
Real Estate Secured by Nonfarm Nonresidential [Member] | Weak Pass [Member]
Loans Credit Quality Indicators
Total	71,532	75,384
Real Estate Secured by Nonfarm Nonresidential [Member] | Special Mention [Member]
Loans Credit Quality Indicators
Total	19,611	18,663
Real Estate Secured by Nonfarm Nonresidential [Member] | Substandard [Member]
Loans Credit Quality Indicators
Total	19,007	18,917
Consumer Installment [Member]
Loans Credit Quality Indicators
Total	6,160	6,620	5,191
Consumer Installment [Member] | Pass [Member]
Loans Credit Quality Indicators
Total	4,071	4,025
Consumer Installment [Member] | Weak Pass [Member]
Loans Credit Quality Indicators
Total	1,741	2,212
Consumer Installment [Member] | Special Mention [Member]
Loans Credit Quality Indicators
Total	284	254
Consumer Installment [Member] | Substandard [Member]
Loans Credit Quality Indicators
Total	64	129
Credit Cards and Related Plans [Member]
Loans Credit Quality Indicators
Total	1,723	1,661	2,422
Credit Cards and Related Plans [Member] | Pass [Member]
Loans Credit Quality Indicators
Total	871	850
Credit Cards and Related Plans [Member] | Weak Pass [Member]
Loans Credit Quality Indicators
Total	580	529
Credit Cards and Related Plans [Member] | Special Mention [Member]
Loans Credit Quality Indicators
Total	270	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	55,005	45,679	47,780
Commercial and Industrial [Member] | Pass [Member]
Loans Credit Quality Indicators
Total	29,978	25,133
Commercial and Industrial [Member] | Weak Pass [Member]
Loans Credit Quality Indicators
Total	19,737	16,146
Commercial and Industrial [Member] | Special Mention [Member]
Loans Credit Quality Indicators
Total	3,627	2,686
Commercial and Industrial [Member] | Substandard [Member]
Loans Credit Quality Indicators
Total	1,663	1,714
Loans to Finance Agricultural Production [Member]
Loans Credit Quality Indicators
Total	36,856	21,539	23,715
Loans to Finance Agricultural Production [Member] | Pass [Member]
Loans Credit Quality Indicators
Total	28,582	16,473
Loans to Finance Agricultural Production [Member] | Weak Pass [Member]
Loans Credit Quality Indicators
Total	7,917	3,290
Loans to Finance Agricultural Production [Member] | Special Mention [Member]
Loans Credit Quality Indicators
Total	357	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	10,240	10,589	16,633
All Other Loans [Member] | Pass [Member]
Loans Credit Quality Indicators
Total	5,826	3,171
All Other Loans [Member] | Weak Pass [Member]
Loans Credit Quality Indicators
Total	4,390	7,393
All Other Loans [Member] | Special Mention [Member]
Loans Credit Quality Indicators
Total	24	25
All Other Loans [Member] | Substandard [Member]
Loans Credit Quality Indicators
Total