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Business Segments (Tables)
3 Months Ended
Mar. 31, 2012
Business Segments [Abstract]  
Business Segments
     Three Months Ended
March 31,
 
     2012     2011  

Net service revenues

    

Temporary and consultant staffing

   $ 829,657      $ 714,682   

Permanent placement staffing

     82,862        67,604   

Risk consulting and internal audit services

     102,925        98,583   
  

 

 

   

 

 

 
   $ 1,015,444      $ 880,869   
  

 

 

   

 

 

 

Operating income (loss)

    

Temporary and consultant staffing

   $ 69,154      $ 38,070   

Permanent placement staffing

     13,266        7,867   

Risk consulting and internal audit services

     (2,355 )      (1,534 ) 
  

 

 

   

 

 

 
     80,065        44,403   

Amortization of intangible assets

     35        39   

Interest income, net

     (234 )      (212 ) 
  

 

 

   

 

 

 

Income before income taxes

   $ 80,264      $ 44,576