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Redeemable Noncontrolling Interests And Subsidiary Acquisitions (Tables)
9 Months Ended
Sep. 30, 2011
Redeemable Noncontrolling Interests And Subsidiary Acquisitions [Abstract] 
Subsidiary Acquisitions
     September 30,
2011
     December 31,
2010
 

Previous owners of Cadence Network

   $ 39,048       $ 38,098   

Stock options and other outstanding redeemable stock

     13,022         8,624   
  

 

 

    

 

 

 

Total redeemable noncontrolling interests

   $ 52,070       $ 46,722