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Revenue Recognition (Tables)
6 Months Ended
Jun. 29, 2013
Revenue Recognition  
Schedule of reimbursable expenses included in revenues

 Reimbursable expenses are as follows (in thousands):

 
  Quarter Ended   Fiscal Year to Date
Period Ended
 
 
  June 29,
2013
  June 30,
2012
  June 29,
2013
  June 30,
2012
 

Reimbursable expenses

  $ 9,750   $ 8,817   $ 17,408   $ 17,114