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Workers' Compensation (Tables)
 6 Months Ended
Jun. 30, 2012
Workers' Compensation [Abstract]  
Summarizes aggregate workers' compensation reserve activity

The following table summarizes the aggregate workers’ compensation reserve activity (in thousands):

 

                                 
    Three Months Ended     Six Months Ended  
    June 30,     June 30,  
    2012     2011     2012     2011  

Beginning balance

                                

Workers’ compensation claims liabilities

   $ 52,794     $ 39,783     $ 51,193     $ 39,301  
         

Add: claims expense accrual:

                                

Current period

     8,170       5,279       16,333       9,985  

Prior periods

     3,110       286       3,110       522  
   

 

 

    

 

 

    

 

 

    

 

 

  

Total expense accrual

     11,280       5,565       19,443       10,507  
   

 

 

    

 

 

    

 

 

    

 

 

  

Less: claim payments related to:

                                

Current period

     1,304       962       1,583       1,219  

Prior periods

     7,005       3,390       13,288       7,593  
   

 

 

    

 

 

    

 

 

    

 

 

  

Total paid

     8,309       4,352       14,871       8,812  
   

 

 

    

 

 

    

 

 

    

 

 

  

Ending balance

                                

Workers' compensation claims liabilities

   $ 55,765     $ 40,996     $ 55,765     $ 40,996  
   

 

 

    

 

 

    

 

 

    

 

 

  

Incurred but not reported (IBNR)

   $ 41,000     $ 29,738     $ 41,000     $ 29,738