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Deferred Revenue and Customer Advances (Tables)
 3 Months Ended
Mar. 30, 2014
Deferred Revenue and Customer Advances

Deferred revenue and customer advances consist of the following and are included in short and long-term deferred revenue and customer advances on the balance sheet:

 

     March 30,
2014		      December 31,
2013		  
     (in thousands)  

Extended warranty

    $ 33,949       $ 34,909   

Equipment maintenance and training

      24,650         22,455   

Customer advances

      9,940         4,825   

Undelivered elements

      5,477         6,971   

Acceptance

      4,776         —     
  

 

 

     

 

 

  

Total deferred revenue and customer advances

    $ 78,792       $ 69,160