Commitments and Contingencies (Tables)

9 Months Ended

Sep. 26, 2020

Commitments and Contingencies Disclosure [Abstract]

Warranty Liabilities

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

	Nine Months Ended
	September 26, 2020		September 28, 2019
Balance at beginning of year	$	11,345	$	10,389
Additions charged to costs and expenses for current-year sales	9,111		8,033
Deductions from reserves	(8,034)		(8,159)
Changes in liability for pre-existing warranties during the current year, including expirations	(381)		1,189
Balance at end of period	$	12,041	$	11,452