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Workers' Compensation Claims (Tables)
 3 Months Ended
Mar. 31, 2016
Text Block [Abstract]  
Summarizes Aggregate Workers' Compensation Reserve Activity

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

 

     Three Months Ended  
     March 31,  
     2016      2015  
            (As Restated)  

Balance at January 1,

      

Workers’ compensation claims liabilities

    $ 255,675       $ 225,300   

Claims expense accrual:

      

Current period

      31,155         27,777   

Prior periods

      848         (2,897 ) 
  

 

 

     

 

 

  
     32,003         24,880   
  

 

 

     

 

 

  

Claim payments related to:

      

Current period

      1,271         898   

Prior periods

      21,264         17,559   
  

 

 

     

 

 

  
     22,535         18,457   
  

 

 

     

 

 

  

Balance at March 31,

      

Workers’ compensation claims liabilities

    $ 265,143       $ 231,723   
  

 

 

     

 

 

  

Incurred but not reported (IBNR)

    $ 132,879       $ 115,661