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Commitments and Contingencies (Tables)
6 Months Ended
Jun. 29, 2019
Commitments And Contingencies Disclosure [Abstract]  
Warranty Liabilities

 

The activity in the accrued warranty liabilities account was as follows (in thousands):

 

 

Six Months Ended

 

 

 

June 29,

2019

 

 

June 30,

2018

 

Balance at beginning of year

 

$

10,389

 

 

$

9,320

 

Additions charged to costs and expenses for current-year sales

 

 

5,003

 

 

 

6,106

 

Deductions from reserves

 

 

(5,591

)

 

 

(5,790

)

Changes in liability for pre-existing warranties during the current year,

   including expirations

 

 

1,418

 

 

 

132

 

Balance at end of period

 

$

11,219

 

 

$

9,768