Warranty Accrual Included in Other Accrued Liabilities (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018
Product Warranty Liability [Line Items]
Balance at beginning of period	$ 8,133	$ 7,136	$ 7,909	$ 8,200
Acquisition			14	41
Accruals for warranties issued during the period	3,508	2,760	10,008	9,171
Accruals related to pre-existing warranties	1,132	282	3,156	109
Settlements made during the period	(4,265)	(2,675)	(12,579)	(10,018)
Balance at end of period	$ 8,508	$ 7,503	$ 8,508	$ 7,503