Summary of Significant Accounting Policies - Additional Information (Detail)		12 Months Ended
	Jan. 01, 2023	Dec. 31, 2024 USD ($) Institution Customer Supplier	Dec. 31, 2023 USD ($) Customer	Dec. 31, 2022 USD ($) Customer
Schedule Of Significant Accounting Policies [Line Items]
Maximum term of original maturities to classify as cash equivalent		3 months
Number of financial institutions where deposits are maintained | Institution		1
Valuation allowance		$ 0	$ 0
Number of customers that accounted for 10% or more of net sales | Customer		3	3	3
Number of customer accounted for 10% or more account receivable | Customer		2	3
Number of largest raw material suppliers | Supplier		4
Excess of the replacement cost of inventory over the LIFO value of inventory		$ (49,669,000)	$ (33,439,000)
Valuation allowance		2,638,000	3,307,000
Research and Development costs		3,500,000	3,300,000	$ 500,000
Branding Expenses		$ 53,500,000	$ 48,800,000	$ 43,300,000
Operating leases with an initial term		12 months or less
Leasehold Improvements [Member]
Schedule Of Significant Accounting Policies [Line Items]
Property, plant, and equipment estimated useful life		15 years
Signature Railing And Transcend Cladding [Member]
Schedule Of Significant Accounting Policies [Line Items]
Warranty period	25 years
Maximum [Member]
Schedule Of Significant Accounting Policies [Line Items]
Operating Lease terms		11 years
Commercial Use [Member]
Schedule Of Significant Accounting Policies [Line Items]
Warranty period	10 years	10 years
Commercial Use [Member] | Signature Railing And Transcend Cladding [Member]
Schedule Of Significant Accounting Policies [Line Items]
Warranty period		25 years
Residential Use [Member]
Schedule Of Significant Accounting Policies [Line Items]
Warranty period	25 years
Residential Use [Member] | Signature Railing [Member]
Schedule Of Significant Accounting Policies [Line Items]
Warranty period	25 years
Residential Use [Member] | Transcend Decking [Member]
Schedule Of Significant Accounting Policies [Line Items]
Warranty period	50 years
Residential Use [Member] | Select Decking And Universal Fascia [Member]
Schedule Of Significant Accounting Policies [Line Items]
Warranty period	35 years
Residential Use [Member] | Enhance Decking And Transcend, Select, Enhance And Signature Railing [Member]
Schedule Of Significant Accounting Policies [Line Items]
Warranty period	25 years
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Minimum [Member]
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk as percentage of total		10.00%	10.00%	10.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Customer One [Member]
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk as percentage of total		81.00%	72.00%	64.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer One [Member]
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk as percentage of total		33.00%	27.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer Two [Member]
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk as percentage of total		32.00%	23.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer Three [Member]
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk as percentage of total			20.00%
Raw Materials [Member] | Supplier Concentration Risk [Member] | Four Largest Suppliers [Member]
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk as percentage of total		21.40%	26.70%	17.50%