Commitments and Contingencies (Tables)

3 Months Ended

Mar. 28, 2020

Commitments and Contingencies Disclosure [Abstract]

Warranty Liabilities

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

	Three Months Ended
	March 28, 2020		March 30, 2019
Balance at beginning of year	$	11,345	$	10,389
Additions charged to costs and expenses for current-year sales	2,628		3,192
Deductions from reserves	(2,779)		(3,127)
Changes in liability for pre-existing warranties during the current year, including expirations	297		1,166
Balance at end of period	$	11,491	$	11,620