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Revenue Recognition (Tables)
3 Months Ended
Mar. 30, 2013
Revenue Recognition  
Schedule of reimbursable expenses included in revenues

Reimbursable expenses are as follows (in thousands):

 
  Quarter Ended  
 
  March 30,
2013
  March 31,
2012
 

Reimbursable expenses

  $ 7,658   $ 8,297