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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