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Revenue Recognition (Tables)
9 Months Ended
Sep. 29, 2018
Revenue from Contract with Customer [Abstract]  
Summary of Activity of Deferred Revenue and Customer Advances

The following is a summary of the activity of the Company’s deferred revenue and customer advances for the nine months ended September 29, 2018 and September 30, 2017 (in thousands):

 

     September 29,
2018
     September 30,
2017
 

Balance at the beginning of the period

   $ 192,590      $ 173,780  

Recognition of revenue included in balance at beginning of the period

     (147,310      (132,435

Revenue deferred during the period, net of revenue recognized

     179,571        169,337  
  

 

 

    

 

 

 

Balance at the end of the period

   $ 224,851      $ 210,682  
  

 

 

    

 

 

 
Schedule of Estimated Amount of Deferred Revenue and Customer Advances

The estimated amount of deferred revenue and customer advances equals the transaction price allocated to unfulfilled performance obligations for the period presented. Such amounts are expected to be recognized in the future as follows (in thousands):

 

     September 29, 2018  

Deferred revenue and customer advances expected to be recognized:

  

In one year or less

   $ 186,485  

In 13-24 months

     26,316  

In 25 months and beyond

     12,050  
  

 

 

 

Total

   $ 224,851