Warranty - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Product Warranty Liability [Line Items]
Warranty expense, average rate of sales	1.70%	1.80%	1.70%	1.70%
Changes in warranty reserve	$ (3)	$ 660	$ 30	$ 868
Accrued warranty reserve	7,700		7,700
NewSouth [Member]
Product Warranty Liability [Line Items]
Changes in warranty reserve	900		2,500
Accrued Expenses [Member]
Product Warranty Liability [Line Items]
Accrued warranty reserve	$ 6,200		$ 6,200
Minimum [Member]
Product Warranty Liability [Line Items]
Warranty periods			1 year
Warranty period of the majority of products sold			1 year
Maximum [Member]
Product Warranty Liability [Line Items]
Warranty periods			10 years
Warranty period of the majority of products sold			3 years