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Product Warranty (Tables)
 6 Months Ended
Jul. 04, 2021
Other Accrued Liabilities Related costs are charged to the warranty accrual as incurred. The balance below is included in other accrued liabilities.
    
For the Three Months

Ended
     
For the Six Months

Ended
  
    
July 4,

2021
     
June 28,

2020
     
July 4,

2021
     
June 28,

2020
  
    
(in thousands)
  
Balance at beginning of period
    $ 23,893      $ 10,971      $ 16,633      $ 8,996  
Accruals for warranties issued during the period
      10,197        6,200        22,078        11,267  
Accruals related to pre-existing warranties
      (3,450 )       356        (3,003 )       1,412  
Settlements made during the period
      (4,964 )       (4,511 )       (10,032 )       (8,659 ) 
    
 
 
     
 
 
     
 
 
     
 
 
  
Balance at end of period
    $ 25,676      $ 13,016      $ 25,676      $ 13,016  
    
 
 
     
 
 
     
 
 
     
 
 
  
Extended Product Warranty of Short and Long-Term Deferred Revenue and Customer Advances Related costs are expensed as incurred. The balance below is included in short and long-term deferred revenue and customer advances.
    
For the Three Months

Ended
     
For the Six Months

Ended
  
    
July 4,

2021
     
June 28,

2020
     
July 4,

2021
     
June 28,

2020
  
    
(in thousands)
  
Balance at beginning of period
    $ 53,908      $ 33,503      $ 51,929      $ 30,677  
Deferral of new extended warranty revenue
      16,290        11,450        23,805        19,050  
Recognition of extended warranty deferred revenue
      (6,673 )       (4,775 )       (12,209 )       (9,549 ) 
    
 
 
     
 
 
     
 
 
     
 
 
  
Balance at end of period
    $ 63,525      $ 40,178      $ 63,525      $ 40,178