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Supplemental Financial Information (Tables)
12 Months Ended
Feb. 21, 2018
Receivables [Abstract]  
Summary of Additions and Deductions Related to Allowances for Doubtful Accounts

Additions and deductions related to the allowance for doubtful accounts receivable for 2017, 2016 and 2015 were as follows (in thousands):

 

     Balance at
Beginning
of Year
     Additions      Deductions     Balance at
End of Year
 

Allowance for doubtful accounts receivable:

          

Year ended December 31, 2017

   $ 9,138      $ 5,245      $ (4,225   $ 10,158  
  

 

 

    

 

 

    

 

 

   

 

 

 

Year ended December 31, 2016

   $ 11,872      $ 2,452      $ (5,186   $ 9,138  
  

 

 

    

 

 

    

 

 

   

 

 

 

Year ended December 31, 2015

   $ 19,336      $ 6,761      $ (14,225   $ 11,872