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Revenue Recognition (Tables)
9 Months Ended
Sep. 29, 2012
Revenue Recognition  
Schedule of reimbursable expenses included in revenues

 Reimbursable expenses are as follows (in thousands):

 
  Quarter Ended   Fiscal Year to Date
Period Ended
 
 
  September 29,
2012
  October 1,
2011
  September 29,
2012
  October 1,
2011
 

Reimbursable expenses

  $ 7,956   $ 8,660   $ 25,070   $ 30,260