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Warranty Reserves - Schedule of Changes in the Aggregate Warranty Reserve (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 27, 2020
Jun. 29, 2019
Jun. 27, 2020
Jun. 29, 2019
Product Warranties Disclosures [Abstract]        
Balance - beginning of period $ 39,368 $ 35,042 $ 39,758 $ 38,276
Accrual for products sold [1] 13,659 17,366 31,527 28,215
Expenditures (13,734) (13,078) (31,992) (27,161)
Balance - end of period $ 39,293 $ 39,330 $ 39,293 $ 39,330
[1] Changes in cost estimates related to pre-existing warranties were not material and aggregated with accruals for new warranty contracts in the ‘Accrual for products sold’ line.