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Redeemable Noncontrolling Interests And Subsidiary Acquisitions (Tables)
3 Months Ended
Mar. 31, 2012
Redeemable Noncontrolling Interests And Subsidiary Acquisitions [Abstract]  
Redeemable Noncontrolling Interests
     March 31,
2012
     December 31,
2011
 

Previous owners of Cadence Network

   $ 44,295       $ 38,893   

Stock options and other outstanding redeemable stock

     13,338         12,916   
  

 

 

    

 

 

 

Total redeemable noncontrolling interests

   $ 57,633       $ 51,809