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Comprehensive Income
 6 Months Ended
Jun. 30, 2011
Comprehensive Income [Abstract]  
Comprehensive Income
4. Comprehensive Income
Comprehensive income represents net income plus the results of certain equity changes not reflected in the Consolidated Statements of Operations. The components of comprehensive income, net of tax, are as follows:
                                 
    Three Months Ended     Six Months Ended  
    June 30,     June 30,  
    2011     2010     2011     2010  
 
                               
Net income
  $ 2,841,891     $ 441,303     $ 5,111,242     $ 304,361  
 
                               
Curtailment of post retirement benefit
    —       298,000       —       298,000  
 
                               
Change in post retirement benefits, net of tax benefit of $20,655 and $41,309 for the three and six months ended June 30, 2011 and tax expense of $9,917 and $19,607 for the three and six months ended June 30, 2010, respectively
    (48,595 )     19,250       (97,190 )     38,059  
 
                               
Change in interest rate swaps, net of tax of $6,890 and $13,999 for the three and six months ended June 30, 2011 and tax of $9,945 and $20,448 for the three and six months ended June 30, 2010, respectively
    13,587       19,304       27,387       39,693  
 
                       
 
                               
Comprehensive income
  $ 2,806,883     $ 777,857     $ 5,041,439     $ 680,113