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Goodwill (Tables)
12 Months Ended
Dec. 31, 2012
Goodwill  
Schedule of changes in the carrying value of goodwill

The changes in the carrying value of goodwill for fiscal 2012 and 2011 were as follows (in thousands):

 
  Goodwill  

Balance at December 31, 2010

  $ 145,580  

Additions

    60,206  

Foreign currency translation adjustments

    (1,165 )
       

Balance at December 31, 2011

  $ 204,621  

Additions

    78  

Foreign currency translation adjustments

    2,233  
       

Balance at December 31, 2012

  $ 206,932