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Revenue Recognition - Summary of Revenues Disaggregated by End Market and Product (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Net revenues	$ 332,584	$ 282,196	$ 634,312	$ 537,865
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	$ 218,493	$ 189,967	$ 420,768	$ 365,590
Insulation [Member] | Revenue [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Percentage of Net revenues	66.00%	67.00%	67.00%	68.00%
Waterproofing [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 24,892	$ 22,119	$ 47,498	$ 43,124
Waterproofing [Member] | Revenue [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Percentage of Net revenues	7.00%	8.00%	7.00%	8.00%
Shower Doors, Shelving and Mirrors [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 22,773	$ 18,373	$ 43,032	$ 31,258
Shower Doors, Shelving and Mirrors [Member] | Revenue [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Percentage of Net revenues	7.00%	6.00%	7.00%	6.00%
Garage Doors [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 19,326	$ 15,176	$ 34,792	$ 29,464
Garage Doors [Member] | Revenue [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Percentage of Net revenues	6.00%	5.00%	5.00%	5.00%
Rain Gutters [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 10,608	$ 10,188	$ 19,266	$ 18,630
Rain Gutters [Member] | Revenue [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Percentage of Net revenues	3.00%	4.00%	3.00%	3.00%
Blinds [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 8,079	$ 1,890	$ 13,385	$ 3,274
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	$ 28,413	$ 24,483	$ 55,571	$ 46,525
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	$ 257,904	$ 216,866	$ 487,546	$ 409,388
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%	76.00%
Repair and Remodel[Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 21,873	$ 18,006	$ 42,345	$ 34,875
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%	7.00%
Commercial [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 52,807	$ 47,324	$ 104,421	$ 93,602
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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