Revenue Recognition and Contracts with Customers - Net Sales by Reporting Segment, Product Category and Market (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Disaggregation Of Revenue [Line Items]
Net sales	$ 238,033	$ 197,823	$ 661,020	$ 570,130
Southeast Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales	203,741	161,892	560,241	465,051
Western Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales	34,292	35,931	100,779	105,079
Impact-Resistant Windows and Door Products [Member]
Disaggregation Of Revenue [Line Items]
Net sales	173,300	138,400	471,000	395,700
Non-Impact Window and Door Products [Member]
Disaggregation Of Revenue [Line Items]
Net sales	64,700	59,400	190,000	174,400
New Construction [Member]
Disaggregation Of Revenue [Line Items]
Net sales	102,000	95,600	305,100	281,500
Repair and Remodel [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 136,000	$ 102,200	$ 355,900	$ 288,600