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Employee Benefit Plans (Tables)
 6 Months Ended
Jun. 30, 2012
Employee Benefit Plans [Abstract]  
Summary of employee benefits charged to operating expenses
                                 
    For the Three Months Ended June 30,     For the Six Months Ended June 30,  
    2012     2011     2012     2011  

Payroll taxes

   $ 283,947     $ 264,350     $ 579,139     $ 578,879  

Medical plans

     440,645       434,470       898,148       876,789  

401k match

     81,131       67,414       147,719       135,013  

Pension plan

     329,953       227,592       659,907       455,185  

Profit-sharing

     56,000       48,000       158,000       71,000  

Other

     124,484       58,405       173,298       99,968  
   

 

 

    

 

 

    

 

 

    

 

 

  
         

Total employee benefits

   $ 1,316,160     $ 1,100,231     $ 2,616,211     $ 2,216,834  
   

 

 

    

 

 

    

 

 

    

 

 

  
Components of net pension cost
                 
    Estimated
2012		     Actual
2011		  
     

Service cost—benefits earned during the year

   $ 1,202,624     $ 930,691  

Interest costs on projected benefit obligations

     667,642       603,903  

Expected return on plan assets

     (721,457 )      (705,767 ) 

Amortization of prior service cost

     78,628       78,628  

Amortization of unrecognized net loss

     92,378       —    
   

 

 

    

 

 

  
     

Net periodic pension expense

   $ 1,319,815     $ 907,455  
   

 

 

    

 

 

  

Pension expense—three months ended June 30, (actual)

   $ 329,953     $ 227,592  

Pension expense—six months ended June 30, (actual)

   $ 659,907     $ 455,185