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Product Warranties (Tables)
 9 Months Ended
Sep. 28, 2019
Product Warranties Disclosures [Abstract]  
Activity Associated with Warranty Obligations
The following table summarizes when these estimated warranty issues are expected to be paid (in thousands):
 
September 28,
2019
 
December 29,
2018
Current - in the next twelve months
$
9,538

 
$
9,455

Long-term - beyond one year
6,068

 
5,995

Total
$
15,606

 
$
15,450


Activity associated with warranty obligations was as follows (in thousands):
 
Nine Months Ended
 
September 28,
2019
 
September 29,
2018
Balance at beginning of period
$
15,450

 
$
15,388

Accruals for warranties issued during period
15,406

 
22,130

Adjustments related to pre-existing warranties
127

 
116

Warranty issues resolved during the period
(15,377
)
 
(22,203
)
Balance at end of period
$
15,606

 
$
15,431