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Summarized Quarterly Financial Data (Unaudited)
 12 Months Ended
Dec. 31, 2012
Summarized Quarterly Financial Data [Abstract]  
Summarized Quarterly Financial Data (Unaudited)
(23) Summarized Quarterly Financial Data (Unaudited)
 
Quarterly financial information for 2012 and 2011 is as follows:
 
   
Quarter
  
2012
  
First
    
Second
    
Third
    
Fourth
  
Revenues
  
$
34,408,999
    
$
35,521,672
    
$
37,651,354
    
$
43,534,781
  
Income from operations
    
6,708,500
      
5,099,534
      
6,161,418
      
3,009,214
  
Net income
    
4,681,691
      
3,610,790
      
4,379,071
      
2,001,111
  
Net income per share:
                                
Basic
  
$
0.25
    
$
0.20
    
$
0.24
    
$
0.11
  
Diluted
  
$
0.25
    
$
0.20
    
$
0.24
    
$
0.11
  
 
   
Quarter
  
2011
  
First
    
Second
    
Third
    
Fourth
  
Revenues
  
$
33,225,219
    
$
41,534,386
    
$
37,074,759
    
$
38,912,952
  
Income from operations
    
6,842,861
      
8,088,971
      
7,532,363
      
7,647,150
  
Net income
    
4,852,924
      
5,860,950
      
5,431,760
      
5,503,030
  
Net income per share:
                                
Basic
  
$
0.26
    
$
0.32
    
$
0.30
    
$
0.30
  
Diluted
  
$
0.26
    
$
0.32
    
$
0.30
    
$
0.30