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EARNINGS PER SHARE (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
May 14, 2012
EARNINGS PER SHARE          
Percentage of dividend paid on common stock         5.00%
Numerator:          
Net income $ 1,111,642 $ 1,046,578 $ 11,521,781 $ 7,397,087  
Denominator:          
Basic - weighted average common shares outstanding 20,566,096 20,211,848 20,433,905 20,194,276  
Basic EPS (in dollars per share) $ 0.05 $ 0.05 $ 0.56 $ 0.37  
Numerator:          
Net income $ 1,111,642 $ 1,046,578 $ 11,521,781 $ 7,397,087  
Denominator:          
Weighted average common shares outstanding 20,566,096 20,211,848 20,433,905 20,194,276  
Effect of Dilutive Securities:          
Stock options (in shares) 312,881 300,913 381,276 317,785  
Diluted - weighted average common shares outstanding 20,878,977 20,512,761 20,815,181 20,512,061  
Diluted EPS (in dollars per share) $ 0.05 $ 0.05 $ 0.55 $ 0.36