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Revenue Recognition - Summary of Revenues Disaggregated by End Market and Product (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Net revenues	$ 348,999	$ 295,193	$ 983,311	$ 833,058
Revenue [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Percentage of Net revenues	100.00%	100.00%	100.00%	100.00%
Insulation [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 225,503	$ 195,872	$ 646,270	$ 561,462
Insulation [Member] | Revenue [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Percentage of Net revenues	65.00%	66.00%	66.00%	67.00%
Waterproofing [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 25,980	$ 21,571	$ 73,477	$ 64,695
Waterproofing [Member] | Revenue [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Percentage of Net revenues	7.00%	7.00%	7.00%	8.00%
Shower Doors, Shelving and Mirrors [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 23,190	$ 21,849	$ 66,222	$ 53,107
Shower Doors, Shelving and Mirrors [Member] | Revenue [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Percentage of Net revenues	7.00%	7.00%	7.00%	6.00%
Garage Doors [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 21,781	$ 15,874	$ 56,574	$ 45,338
Garage Doors [Member] | Revenue [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Percentage of Net revenues	6.00%	6.00%	6.00%	5.00%
Rain Gutters [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 12,163	$ 10,863	$ 31,429	$ 29,493
Rain Gutters [Member] | Revenue [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Percentage of Net revenues	4.00%	4.00%	3.00%	4.00%
Blinds [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 7,811	$ 2,634	$ 21,196	$ 5,909
Blinds [Member] | Revenue [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Percentage of Net revenues	2.00%	1.00%	2.00%	1.00%
Other Building Products [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 32,571	$ 26,530	$ 88,143	$ 73,054
Other Building Products [Member] | Revenue [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Percentage of Net revenues	9.00%	9.00%	9.00%	9.00%
Residential New Construction [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 268,254	$ 228,526	$ 755,800	$ 637,915
Residential New Construction [Member] | Revenue [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Percentage of Net revenues	77.00%	77.00%	77.00%	77.00%
Repair and Remodel[Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 23,107	$ 18,722	$ 65,453	$ 53,597
Repair and Remodel[Member] | Revenue [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Percentage of Net revenues	7.00%	6.00%	7.00%	6.00%
Commercial [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 57,638	$ 47,945	$ 162,058	$ 141,546
Commercial [Member] | Revenue [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Percentage of Net revenues	16.00%	17.00%	16.00%	17.00%

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