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Earnings per Share (Tables)
12 Months Ended
Dec. 31, 2012
Earnings Per Share [Abstract]  
Summary of basic and diluted net income per share
 
       
Year Ended
       
   
December 31,
 
   
2012
   
2011
   
2010
 
Basic income per share
                       
Net Income for the year - numerator
 
$
14,672,663
   
$
21,648,664
   
$
15,551,536
 
Weighted average common stock outstanding - denominator
   
18,456,781
     
18,349,332
     
17,435,218
 
Net income per share
 
$
0.79
   
$
1.18
   
$
0.89
 
                         
Diluted income per share
                       
Net Income for the year - numerator
 
$
14,672,663
   
$
21,648,664
   
$
15,551,536
 
Weighted average common stock outstanding - denominator
   
18,456,781
     
18,349,332
     
17,435,218
 
Effect of dilution
                       
Warrant
   
-
     
-
     
1,028
 
Weighted average common stock outstanding - denominator
   
18,456,781
     
18,349,332
     
17,436,246
 
Diluted income per share
 
$
0.79
   
$
1.18
   
$
0.89