Loans (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Analysis of the credit risk profile of each loan class
Total	$ 382,339	$ 383,594	$ 390,394
Pass [Member]
Analysis of the credit risk profile of each loan class
Total	304,849	304,351
Special Mention [Member]
Analysis of the credit risk profile of each loan class
Total	26,685	26,614
Substandard [Member]
Analysis of the credit risk profile of each loan class
Total	50,805	52,629
Doubtful [Member]
Analysis of the credit risk profile of each loan class
Total
Real estate loans [Member] \| Construction and land development [Member]
Analysis of the credit risk profile of each loan class
Total	45,783	43,524
Real estate loans [Member] \| Secured by 1-4 family residential [Member]
Analysis of the credit risk profile of each loan class
Total	143,765	134,964
Real estate loans [Member] \| Other real estate loans [Member]
Analysis of the credit risk profile of each loan class
Total	162,742	174,220
Real estate loans [Member] \| Pass [Member] \| Construction and land development [Member]
Analysis of the credit risk profile of each loan class
Total	24,600	22,384
Real estate loans [Member] \| Pass [Member] \| Secured by 1-4 family residential [Member]
Analysis of the credit risk profile of each loan class
Total	129,159	120,692
Real estate loans [Member] \| Pass [Member] \| Other real estate loans [Member]
Analysis of the credit risk profile of each loan class
Total	125,182	134,701
Real estate loans [Member] \| Special Mention [Member] \| Construction and land development [Member]
Analysis of the credit risk profile of each loan class
Total	5,184	5,176
Real estate loans [Member] \| Special Mention [Member] \| Secured by 1-4 family residential [Member]
Analysis of the credit risk profile of each loan class
Total	6,421	6,055
Real estate loans [Member] \| Special Mention [Member] \| Other real estate loans [Member]
Analysis of the credit risk profile of each loan class
Total	14,170	14,513
Real estate loans [Member] \| Substandard [Member] \| Construction and land development [Member]
Analysis of the credit risk profile of each loan class
Total	15,999	15,964
Real estate loans [Member] \| Substandard [Member] \| Secured by 1-4 family residential [Member]
Analysis of the credit risk profile of each loan class
Total	8,185	8,217
Real estate loans [Member] \| Substandard [Member] \| Other real estate loans [Member]
Analysis of the credit risk profile of each loan class
Total	23,390	25,006
Real estate loans [Member] \| Doubtful [Member] \| Construction and land development [Member]
Analysis of the credit risk profile of each loan class
Total
Real estate loans [Member] \| Doubtful [Member] \| Secured by 1-4 family residential [Member]
Analysis of the credit risk profile of each loan class
Total
Real estate loans [Member] \| Doubtful [Member] \| Other real estate loans [Member]
Analysis of the credit risk profile of each loan class
Total
Commercial and industrial [Member]
Analysis of the credit risk profile of each loan class
Total	22,743	23,071
Commercial and industrial [Member] \| Pass [Member]
Analysis of the credit risk profile of each loan class
Total	18,673	18,831
Commercial and industrial [Member] \| Special Mention [Member]
Analysis of the credit risk profile of each loan class
Total	839	798
Commercial and industrial [Member] \| Substandard [Member]
Analysis of the credit risk profile of each loan class
Total	3,231	3,442
Commercial and industrial [Member] \| Doubtful [Member]
Analysis of the credit risk profile of each loan class
Total
Consumer and other loans [Member]
Analysis of the credit risk profile of each loan class
Total	7,306	7,815
Consumer and other loans [Member] \| Pass [Member]
Analysis of the credit risk profile of each loan class
Total	7,235	7,743
Consumer and other loans [Member] \| Special Mention [Member]
Analysis of the credit risk profile of each loan class
Total	71	72
Consumer and other loans [Member] \| Doubtful [Member]
Analysis of the credit risk profile of each loan class
Total