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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 28, 2013
Summary of Significant Accounting Policies  
Schedule of reimbursable expenses included in revenues

Reimbursable expenses are as follows (in thousands):

 
   Year Ended   Year Ended   Year Ended  
 
   December 28,
2013
(52 weeks)		   December 29,
2012
(52 weeks)		   December 31,
2011
(52 weeks)		  

Reimbursable expenses

   $ 37,320   $ 33,530   $ 39,722  
Schedule of Roll forward of the accounts receivable allowances

A rollforward of the accounts receivable allowances is as follows (in thousands):

 
   Fiscal
Year		   Fiscal
Year		  
 
   2013   2012  

Balance at beginning of period

   $ 9,459   $ 6,548  

Change related to NeuCo

     (2 )   —  

Additions charged to revenues

     5,644     6,808  

Amounts written off

     (7,891 )   (3,897 )
           
​ ​ ​ ​ ​ ​ ​ ​

Balance at end of period

   $ 7,210   $ 9,459  
           
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