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Property And Equipment, Net (Tables)
9 Months Ended
Sep. 30, 2011
Property And Equipment, Net [Abstract] 
Components Of Property And Equipment
     September 30,
2011
    December 31,
2010
 

Computer hardware

   $ 118,831      $ 115,518   

Computer software

     251,518        232,657   

Furniture and equipment

     113,469        115,730   

Leasehold improvements

     114,329        116,241   

Other

     15,057        14,716   
  

 

 

   

 

 

 

Property and equipment, cost

     613,204        594,862   

Accumulated depreciation

     (506,780 )      (491,211 ) 
  

 

 

   

 

 

 

Property and equipment, net

   $ 106,424      $ 103,651