Trex (TREX) 10-K 26 Feb 24 2023 FY Annual report Financial data

Cover Page

Cover Page - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2023	Feb. 12, 2024	Jun. 30, 2023
Cover [Abstract]
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Type	10-K
Document Fiscal Period Focus	FY
Entity Central Index Key	0001069878
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity Registrant Name	TREX CO INC
Document Period End Date	Dec. 31, 2023
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Trading Symbol	TREX
Entity Shell Company	false
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		108,623,606
Entity File Number	001-14649
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	54-1910453
Entity Address, Address Line One	2500 Trex Way
Entity Address, City or Town	Winchester
Entity Address, Postal Zip Code	22601
Entity Address, State or Province	VA
City Area Code	540
Local Phone Number	542-6300
Title of 12(b) Security	Common stock
Security Exchange Name	NYSE
Document Annual Report	true
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Public Float			$ 7.1
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Auditor Name	Ernst & Young LLP
Auditor Firm ID	42
Auditor Location	Tysons, Virginia

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Net sales	$ 1,094,837	$ 1,106,043	$ 1,196,952
Cost of sales	642,430	702,054	736,448
Gross profit	452,407	403,989	460,504
Selling, general and administrative expenses	176,203	141,831	139,624
Goodwill impairment	0	0	54,245
Loss on sale		15,423
Gain on insurance proceeds			(8,741)
Income from operations	276,204	246,735	275,376
Interest expense (income), net	5	(103)	(15)
Income before income taxes	276,199	246,838	275,391
Provision for income taxes	70,815	62,212	66,654
Net income	$ 205,384	$ 184,626	$ 208,737
Basic earnings per common share	$ 1.89	$ 1.65	$ 1.81
Basic weighted average common shares outstanding	108,680,459	111,710,676	115,461,016
Diluted earnings per common share	$ 1.89	$ 1.65	$ 1.8
Diluted weighted average common shares outstanding	108,809,403	111,880,488	115,762,843
Comprehensive income	$ 205,384	$ 184,626	$ 208,737

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current Assets:
Cash and cash equivalents	$ 1,959	$ 12,325
Accounts receivable, net	41,136	98,057
Inventories	107,089	141,355
Prepaid expenses and other assets	22,070	35,105
Total current assets	172,254	286,842
Property, plant and equipment, net	709,402	589,892
Operating lease assets	26,233	30,991
Goodwill and other intangible assets, net	18,163	18,582
Other assets	6,833	7,398
Total Assets	932,885	933,705
Current Liabilities:
Accounts payable	23,963	19,935
Accrued expenses and other liabilities	56,734	44,064
Accrued warranty	4,865	4,600
Line of credit	5,500	222,000
Total current liabilities	91,062	290,599
Deferred income taxes	72,439	68,224
Operating lease liabilities	18,840	23,974
Non-current accrued warranty	17,313	20,999
Other long-term liabilities	16,560	11,560
Total Liabilities	216,214	415,356
Commitments and contingencies
Stockholders' Equity:
Preferred stock, $0.01 par value, 3,000,000 shares authorized; none issued and outstanding	0	0
Common stock, $0.01 par value, 360,000,000 shares authorized; 140,974,843 and 140,841,833 shares issued and 108,611,537 and 108,743,423 shares outstanding at December 31, 2023 and December 31, 2022, respectively	1,410	1,408
Additional paid-in capital	140,157	131,539
Retained earnings	1,336,058	1,130,674
Treasury stock, at cost, 32,363,306 and 32,098,410 shares at December 31, 2023 and December 31, 2022, respectively	(760,954)	(745,272)
Total Stockholders' Equity	716,671	518,349
Total Liabilities and Stockholders' Equity	$ 932,885	$ 933,705

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	3,000,000	3,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	360,000,000	360,000,000
Common stock, shares issued	140,974,843	140,841,833
Common stock, shares outstanding	108,611,537	108,743,423
Treasury stock, shares	32,363,306	32,098,410

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]
Beginning Balance at Dec. 31, 2020	$ 588,531	$ 1,406	$ 126,087	$ 737,311	$ (276,273)
Beginning Balance, Shares at Dec. 31, 2020		115,799,503			24,777,502
Net income	208,737			208,737
Employee stock plans	1,800		1,800
Employee stock plans, Shares		113,242
Shares withheld for taxes on awards	(8,538)		(8,538)
Shares withheld for taxes on awards, Shares		(78,626)
Stock-based compensation	8,439	$ 1	8,438
Stock-based compensation, Shares		123,132
Repurchases of common stock	(73,935)				$ (73,935)
Repurchases of common stock, Shares		(809,099)			809,099
Ending Balance at Dec. 31, 2021	725,034	$ 1,407	127,787	946,048	$ (350,208)
Ending Balance, Shares at Dec. 31, 2021		115,148,152			25,586,601
Net income	184,626			184,626
Employee stock plans	1,742		1,742
Employee stock plans, Shares		38,320
Shares withheld for taxes on awards	(3,318)	$ 1	(3,319)
Shares withheld for taxes on awards, Shares		(45,834)
Stock-based compensation	5,329	$ 0	5,329
Stock-based compensation, Shares		114,594
Repurchases of common stock	(395,064)				$ (395,064)
Repurchases of common stock, Shares		(6,511,809)			6,511,809
Ending Balance at Dec. 31, 2022	518,349	$ 1,408	131,539	1,130,674	$ (745,272)
Ending Balance, Shares at Dec. 31, 2022		108,743,423			32,098,410
Net income	205,384			205,384
Employee stock plans	1,223		1,223
Employee stock plans, Shares		27,620
Shares withheld for taxes on awards	(2,767)	$ 2	(2,769)
Shares withheld for taxes on awards, Shares		(48,736)
Stock-based compensation	10,164		10,164
Stock-based compensation, Shares		154,126
Repurchases of common stock	(15,682)				$ (15,682)
Repurchases of common stock, Shares		(264,896)			264,896
Ending Balance at Dec. 31, 2023	$ 716,671	$ 1,410	$ 140,157	$ 1,336,058	$ (760,954)
Ending Balance, Shares at Dec. 31, 2023		108,611,537			32,363,306

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Activities
Net income	$ 205,384	$ 184,626	$ 208,737
Adjustments to reconcile net income to net cash provided by operating activities:
Goodwill impairment	0	0	54,245
Depreciation and amortization	50,189	44,298	35,946
Deferred income taxes	4,215	24,256	21,012
Loss on sale		15,423
Stock-based compensation	10,164	5,329	8,438
Loss (gain) on disposal of property, plant and equipment	3,140	(27)	(45)
Other non-cash adjustments	(48)	(117)	40
Changes in operating assets and liabilities:
Accounts receivable	56,921	42,513	(44,349)
Inventories	34,266	(64,454)	(15,515)
Prepaid expenses and other assets	(750)	7,925	(8,715)
Accounts payable	2,697	(5,595)	(3,473)
Accrued expenses and other liabilities	8,875	(14,385)	(5,285)
Income taxes receivable/payable	14,367	(23,572)	7,028
Net cash provided by operating activities	389,420	216,220	258,064
Investing Activities
Expenditures for property, plant and equipment	(166,089)	(176,228)	(159,394)
Proceeds from sale of assets		7,290
Proceeds from sales of property, plant and equipment		54	1,355
Net cash used in investing activities	(166,089)	(168,884)	(158,039)
Financing Activities
Borrowings under line of credit	593,500	425,000	494,500
Principal payments under line of credit	(810,000)	(203,000)	(494,500)
Repurchases of common stock	(18,450)	(398,382)	(82,473)
Proceeds from employee stock purchase and option plans	1,223	1,742	1,800
Financing costs	30	(1,424)
Net cash used in financing activities	(233,697)	(176,064)	(80,673)
Net decrease increase in cash and cash equivalents	(10,366)	(128,728)	19,352
Cash and cash equivalents at beginning of year	12,325	141,053	121,701
Cash and cash equivalents at end of year	1,959	12,325	141,053
Supplemental disclosures of cash flow information:
Cash paid for interest, net of capitalized interest	51
Cash paid for income taxes, net	52,340	59,934	38,614
Supplemental non-cash investing and financing disclosure:
Capital expenditures in accounts payable	$ 1,332	$ 1,814	$ 2,564

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pay vs Performance Disclosure
Net Income (Loss)	$ 205,384	$ 184,626	$ 208,737

Insider Trading Arrangements

Insider Trading Arrangements	12 Months Ended
	Dec. 31, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Business and Organization

Business and Organization	12 Months Ended
	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business and Organization	1. BUSINESS AND ORGANIZATION Trex Company, Inc. (Trex), a Delaware corporation, was incorporated on September 4, 1998. Through December 30, 2022, Trex had one wholly-owned subsidiary, Trex Commercial Products, Inc. Together, Trex and Trex Commercial Products, Inc. are referred to as the Company. Through December 30, 2022, the Company operated in two reportable segments, Trex Residential Products (Trex Residential) and Trex Commercial Products (Trex Commercial). On December 30, 2022, the Company completed the sale of substantially all of the assets of its wholly-owned subsidiary and reportable segment, Trex Commercial. Refer to Note 3 below for more information on the sale. Subsequent to December 30, 2022, the Company operates in one reportable segment, Trex Residential. The Company’s principal business based on net sales is the manufacture and distribution of Trex Residential high-performance, low-maintenance ® (540) 542-6300.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Accounting The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States. The consolidated financial statements include the accounts of the Company. Intercompany accounts and transactions have been eliminated in consolidation. The Company’s results of operations are affected by a number of factors, including, but not limited to, the cost to manufacture and distribute products, cost of raw materials, inflation, consumer spending and preferences, interest rates, the impact of any supply chain disruptions, economic conditions, and/or any adverse effects from global health pandemics and geopolitical conflicts. Towards the end of June 2022, the Company experienced a reduction in demand from its distribution partners, spurred by concerns over a potential easing in consumer demand due to rising interest rates, declining consumer sentiment and expectations of a general slowing in the economy. As a result, beginning in the third quarter of 2022 the Company’s channel partners met demand partially through inventory drawdown rather than reordering products and maintaining current inventories. The drawdown was completed by year end 2022. Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and the accompanying notes. Actual results could differ from those estimates. Cash and Cash Equivalents Cash equivalents consist of highly liquid investments purchased with original maturities of three months or less. Concentrations and Credit Risk The Company’s financial instruments that are exposed to concentrations of credit risk consist primarily of cash and cash equivalents and trade accounts receivable. The Company from time to time may have bank deposits in excess of insurance limits of the Federal Deposit Insurance Corporation. As of December 31, 2023, substantially all deposits are maintained in one financial institution. The Company has not experienced any losses in such accounts and believes it is not exposed to any significant credit risk related to its cash and cash equivalents. The Company routinely assesses the financial strength of its customers and believes that its trade receivables credit risk exposure is limited. Trade receivables are recognized at the amount of revenue recognized on each shipment for Trex Residential products as the Company has an unconditional right to consideration from the customer and payment is due based solely on the passage of time. An estimate of expected credit losses is recognized as a valuation allowance and adjusted each reporting period. The estimate is based on the current expected credit loss model and is determined using an aging schedule, including past events, current conditions and reasonable and supportable forecasts about the future. There was no material valuation allowance recorded as of December 31, 2023 and December 31, 2022. In the years ended December 31, 2023, 2022, and 2021, sales to certain customers of Trex Residential accounted for 10% or more of the Company’s total net sales. For the year ended December 31, 2023, three customers of Trex Residential represented approximately 72% of the Company’s total net sales. For the year ended December 31, 2022, three customers of Trex Residential represented 64% of the Company’s total net sales. For the year ended December 31, 2021, three customers of Trex Residential represented approximately 61% of the Company’s total net sales. No other customer represented 10% or more of the Company’s total net sales. At December 31, 2023, three customers represented 27%, 23%, and 20%, respectively, of the Company’s total accounts receivable balance. At December 31, 2022, two customers represented 35% and 26%, respectively, of the Company’s total accounts receivable balance. For each year ended December 31, 2023, 2022, and 2021, approximately 26.7%, 17.5%, and 26%, respectively, of the Company’s materials purchases at Trex Residential were purchased from its four largest suppliers. Inventories Inventories for the composite decking and railing products at Trex Residential are valued at the lower of cost (last-in, first-out, A majority of the products at Trex Residential are made in a proprietary process that combines reclaimed wood fibers and scrap polyethylene. Trex Residential grinds up scrap materials generated from its manufacturing process and inventories deemed no longer salable and reintroduces the reclaimed material into the manufacturing process as a substitute for raw materials. The reclaimed material is valued at the costs of the raw material components of the material. Property, Plant and Equipment Property, plant and equipment are stated at historical cost. The costs of additions and improvements are capitalized, while maintenance and repairs are expensed as incurred. Cash flows for capital expenditures as reported in cash flows from investing activities in the Consolidated Statements of Cash Flows are adjusted to exclude unpaid amounts accrued at period end. Depreciation is provided using the straight-line method generally over the following estimated useful lives: Buildings 40 years Machinery and equipment 3-11 years Furniture and fixtures 10 years Forklifts and tractors 5 years Computer equipment and software 5 years Leasehold improvements are amortized over the shorter of the lease term or 15 years. The Company reviews its long-lived assets, including property, plant and equipment, whenever events or changes in circumstances indicate that the carrying amount of the assets may not be fully recoverable. To determine the recoverability of its long-lived assets, the Company evaluates the probability that future estimated undiscounted net cash flows will be less than the carrying amount of the long-lived assets. If the estimated cash flows are less than the carrying amount of the long-lived assets, the assets are written down to their fair value. The Company’s estimates of anticipated cash flows and the remaining estimated useful lives of long-lived assets could be reduced in the future. As a result, the carrying amount of long-lived assets could be reduced in the future. Long-lived assets held for sale are stated at the lower of cost or fair value less cost to sell. Leases The Company leases office space, storage warehouses, training and manufacturing facilities, and certain office and plant equipment under various operating leases. At inception of an arrangement, the Company evaluates, among other things, whether it has the right to control the use of an identified asset in order to determine if the arrangement is or contains a lease. Operating leases are included in operating lease right-of-use non-lease non-lease Fair Value Measurement Assets and liabilities measured at fair value are measured at the amount that would be received for selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date and classified into one of the following fair value hierarchies: • Level 1 – Quoted prices for identical instruments in active markets. • Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model derived valuations in which all significant inputs and significant value drivers are observable in active markets. • Level 3 – Valuations derived from management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date. Consideration is given to the risk inherent in the valuation technique and the risk inherent in the inputs to the model. Goodwill Goodwill represents the excess of cost over net assets acquired resulting from the Company’s 1996 purchase of the Mobil Composite Products Division, the 2011 purchase of the assets of the Iron Deck Corporation, and the 2017 purchase of certain assets and the assumption of certain liabilities of SC Company. The Company evaluates the recoverability of goodwill in accordance with Accounting Standard Codification Topic 350, “ Intangibles – Goodwill and Other The Company assigned its goodwill to reporting units and tests each reporting unit’s goodwill for impairment at least on an annual basis, or more frequently if an event occurs or circumstances change in the interim that indicate the carrying amount of reporting unit goodwill exceeds the implied fair value of that goodwill. The Company identified its reporting units based on the way it manages its operating segments. Prior to December 30, 2022, the Company had three reporting units: a residential reporting unit in the Trex Residential reportable segment, and a commercial railing reporting unit and a staging reporting unit in the Trex Commercial reportable segment. Subsequent to the sale of Trex Commercial on December 30, 2022, the Company has one reporting unit in the Trex Residential reportable segment. Each reporting unit constitutes a business with discrete financial information and operating segment management, at a level below the Company’s chief operating decision maker, regularly reviews the operating results of the reporting unit. The Company assigned goodwill to the reporting units based on the excess of the fair values acquired over the fair value of the sum of the individual assets acquired and liabilities assumed that were assigned to the reporting units. In testing for goodwill impairment, the Company first assesses qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill. If the qualitative assessment indicates that the carrying amount of the reporting unit exceeds its fair value, including goodwill, the Company is then required to perform a quantitative goodwill impairment test. The quantitative goodwill impairment test, used to identify both the existence of impairment and the amount of impairment loss, compares the fair value of a reporting unit with its carrying amount, including goodwill. The fair value of a reporting unit refers to the price that would be received to sell the unit as a whole in an orderly transaction between market participants at the measurement date. If the carrying amount of a reporting unit exceeds its fair value, an impairment loss is recognized in an amount equal to that excess, limited to the total amount of goodwill allocated to that reporting unit. The Company measures fair value of the reporting units based on a combination of the Income Approach (i.e., the Discounted Cash Flow Method) and a Market Approach. The Discounted Cash Flow Method is a multiple period discounting model in which the fair value of the reporting units are determined by discounting the projected free cash flows using an appropriate discount rate and indicates the fair value of the reporting units based on the present value of the cash flows that the reporting unit is expected to generate in the future. Significant assumptions in the Discounted Cash Flow Method include: the weighted average cost of capital (or discount rate); residual growth rate; future cash flow projections; and working capital effects. The Market Approach uses prices and other relevant information generated by market transactions involving identical or comparable assets, liabilities or a group of assets and liabilities, such as a business. Significant estimates in the Market Approach model may include identifying appropriate market multiples and assessing earnings before interest, income taxes, depreciation, and amortization (EBITDA) in estimating the fair value of the reporting units. The use of different assumptions, estimates or judgements, including estimated future cash flows and the discount rate used to discount estimated cash flows to their net present value, could materially increase or decrease the fair value of the reporting unit and impact our assessment of any goodwill impairment charges. Also, if different conditions exist in future periods, future impairment charges could result. The Company performs the annual impairment testing of its goodwill as of October 31 of each year. For fiscal years 2023, 2022 and 2021, the Company completed its annual impairment test of goodwill for its Trex Residential reporting segment residential reporting unit utilizing the qualitative assessment and concluded it was not more likely than not that the fair value of the residential reporting unit was less than its carrying amount. Qualitative factors the Company considered include events and circumstances such as macroeconomic conditions, industry and market considerations, cost factors, overall financial performance, and other relevant Company-specific events, as applicable. For fiscal year 2021, the Company determined that it was necessary to perform the goodwill impairment test for its Trex Commercial reportable segment railing and staging reporting units utilizing the quantitative assessment. The Company performed a quantitative assessment primarily due to a reduction in project commitments, which adversely impacted project backlog and forecasted net sales and EBITDA. The reduction in project commitments was influenced by a continued delay in new projects due to lingering uncertainty created in the commercial railing and staging markets by the COVID-19 pre-pandemic tax-deductible The Company uses assumptions that are consistent with those it believes a market participant would use. However, the use of different events and circumstances or different assumptions, estimates or judgements, including estimated future cash flows, and the discount rate used to discount estimated cash flows to their net present value and the residual growth rate, could materially increase or decrease the fair value of the reporting unit and impact our assessment of any goodwill impairment charge. Product Warranty The Company warrants that for the applicable warranty period its Trex Residential products, when properly installed, used and maintained, will be free from material defects in workmanship and materials and its decking, cladding, fascia and railing products will not split, splinter, rot or suffer structural damage from termites or fungal decay. Products sold on or after January 1, 2023: The warranty period for residential use is 50 years for Transcend ® years for Select ® decking and Universal Fascia, and ® ® that Trex Transcend, Trex Enhance and Trex Select decking and cladding and Universal Fascia products will not fade in color from light and weathering exposure more than a certain amount and will be resistant to permanent staining from food and beverage substances or mold and mildew, provided the stain is cleaned within seven days of appearance, for the warranty period referred to above. If there is a breach of such warranties, the Company has an obligation either to replace the defective product or refund the purchase price. Products sold prior to January 1, 2023: The warranty period is 25 years for residential use and 10 years for commercial use. With respect to Trex Signature railing, the warranty period is 25 years for both residential and commercial use. The Company further warrants that Trex Transcend, Trex Enhance, Trex Select and Universal Fascia products will not fade in color more than a certain amount and will be resistant to permanent staining from food substances or mold, provided the stain is cleaned within seven days of appearance, for the warranty period referred to above. If there is a breach of such warranties, the Company has an obligation either to replace the defective product or refund the purchase price. The Company maintains a warranty reserve for the settlement of its product warranty claims. The Company accrues for the estimated cost of product warranty claims at the time revenue is recognized based on such factors as historical claims experience and expected future claims experience. Management reviews and adjusts these estimates, if necessary, based on the differences between actual experience and historical estimates. Additionally, the Company accrues for warranty costs associated with occasional or unanticipated product quality issues if a loss is probable and can be reasonably estimated, as necessary. Treasury Stock The Company records the repurchase of shares of its common stock at cost. These shares are considered treasury stock, which is a reduction to stockholders’ equity. Treasury stock is included in authorized and issued shares but excluded from outstanding shares. Revenue Recognition Trex Residential Products. low-maintenance, eco-friendly Trex Commercial Products. Trex Commercial satisfied its performance obligation over time as work progressed because control transferred continuously to its customers. Revenue and estimated profit were recognized over time based on the proportion of actual costs incurred to date relative to total estimated costs at completion to measure progress toward satisfying the performance obligation. Incurred costs represent work performed, which corresponds with, and thereby best depicts, the transfer of control to the customer. Incurred costs included all direct material, labor, subcontract and certain indirect costs. The Company reviewed and updated its estimates regularly and recognized adjustments in estimated profit on contracts under the cumulative catch-up Insurance Proceeds The Company maintains insurance coverage for losses it may incur from identifiable insurable events resulting in facility repairs, incremental direct costs to serve its customers and losses in operating income from the loss in net sales. The Company recognizes a gain in the amount of any related insurance proceeds received in excess of any losses incurred. The gain on insurance proceeds is presented in a separate line item in the Consolidated Statements of Comprehensive Income. During the year ended December 31, 2021, the Company recognized gains on insurance proceeds of $8.7 million primarily related to the fire at its Virginia Facility. Stock-Based Compensation The Company measures stock-based compensation at the grant date of the award based on the fair value. For stock options, stock appreciation rights and time-based restricted stock and time-based restricted stock units, stock-based compensation is recognized on a straight-line basis over the vesting periods of the award. The Company recognizes forfeitures as they occur. For performance-based restricted stock and performance-based restricted stock units, expense is recognized ratably over the performance and vesting period of each tranche based on management’s judgment of the ultimate award that is probable to be paid out based on the achievement of predetermined performance measures. Stock-based compensation expense is included in “Selling, general and administrative expenses” in the accompanying Consolidated Statements of Comprehensive Income. Income Taxes The Company recognizes deferred tax assets and liabilities based on the difference between the financial statement basis and tax basis of assets and liabilities using enacted tax laws and statutory tax rates. The Company assesses the likelihood that its deferred tax assets will be realized. Deferred tax assets are reduced by a valuation allowance when, after considering all available positive and negative evidence, it is determined that it is more likely than not that some portion, or all, of the deferred tax asset will not be realized. As of December 31, 2023, the Company has a valuation allowance of $3.3 million against these deferred tax assets related to certain state tax credits. The Company analyzes its position in subsequent reporting periods, considering all available positive and negative evidence, in determining the expected realization of its deferred tax assets. Research and Development Costs Research and development costs are expensed as incurred. For the years ended December 31, 2023, 2022, and 2021, research and development costs were $3.3 million, $0.5 million, and $6.0 million, respectively, and have been included in “Selling, general and administrative expenses” in the accompanying Consolidated Statements of Comprehensive Income. Advertising Costs The Company expenses its branding and advertising communication costs as incurred. Production costs are deferred and recognized as expense in the period that the related advertisement is first used. At December 31, 2023 and December 31, 2022, $1.8 million and $1.6 million was included in prepaid expenses for production costs, respectively. For the years ended December 31, 2023, 2022, and 2021, branding expenses, including advertising expenses as described above, were $48.8 million, $43.3 million, and $30.7 million, respectively. Fair Value of Financial Instruments The Company considers the recorded value of its financial assets and liabilities, consisting primarily of cash and cash equivalents, accounts receivable, accounts payable, accrued expenses and other current liabilities, and debt to approximate the fair value of the respective assets and liabilities on the Consolidated Balance Sheets at December 31, 2023 and 2022. New Accounting Standards Not Yet Adopted In November 2023, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2023-07, In December 2023, the FASB issued ASU No. 2023-09,

Sale of Trex Commercial Product

Sale of Trex Commercial Products, Inc.	12 Months Ended
	Dec. 31, 2023
Trex Commercial Products Inc [Member]
Subsidiary or Equity Method Investee [Line Items]
Sale of Trex Commercial Products, Inc.	3. SALE OF TREX COMMERCIAL PRODUCTS, INC. On December 30, 2022, the Company completed the sale of substantially all of the assets of its wholly-owned subsidiary and reportable segment, Trex Commercial, for net proceeds of $7.3 million. The divestiture reflected the Company’s decision to focus on driving the most profitable growth strategy for the Company and its shareholders through the execution of its outdoor living strategy. With the sale complete, the Company has dedicated its resources to accelerating conversion to composites from wood and further strengthen its leadership position in the outdoor living category. The sale resulted in a loss on sale of $15.4 million and is reported in the Consolidated Statements of Comprehensive Income. The divestiture did not represent a strategic shift with a major effect on the Company’s operations and financial results and, therefore, was not reported as a discontinued operation. As such, the results of operations of Trex Commercial are consolidated in the Company’s results of operations for the years ended December 31, 2022, and December 31, 2021. Refer to Note 17, Segment Information, for additional information on the Trex Commercial segment.

Inventories

Inventories	12 Months Ended
	Dec. 31, 2023
Inventory Disclosure [Abstract]
Inventories	4. INVENTORIES Inventories at LIFO value consist of the following as of December 31 (in thousands): 2023 2022 Finished goods $ 88,840 $ 107,114 Raw materials 51,688 69,292 Total FIFO inventories 140,528 176,406 Reserve to adjust inventories to LIFO value (33,439 ) (35,051 ) Total LIFO inventories $ 107,089 $ 141,355 Inventory related to Trex Residential composite decking and railing products is stated at the lower of LIFO cost or market. The Company periodically reviews its inventory for slow moving or obsolete items and writes down the related products to estimated market. Under the LIFO method, reductions in inventory cause a portion of the Company’s cost of sales to be based on historical costs rather than current year costs. During the year ended December 31, 2023, the Company had a liquidation of inventories produced in the prior year ended December 31, 2022. As a result, a portion of the Company’s cost of sales is based on prior year costs rather than on current year costs. However, the prior year cost of inventory closely approximates the current year cost of inventory and the resulting effect of the liquidation of inventories on the Company’s cost of sales was immaterial in the year ended December 31, 2023,.

Prepaid Expenses and Other Asse

Prepaid Expenses and Other Assets	12 Months Ended
	Dec. 31, 2023
Text Block [Abstract]
Prepaid Expenses and Other Assets	5. PREPAID EXPENSES AND OTHER ASSETS Prepaid expenses and other assets consist of the following as of December 31 (in thousands): 2023 2022 Prepaid expenses $ 11,830 $ 10,787 Income tax receivable 9,611 23,979 Other 629 339 Total prepaid expenses and other assets $ 22,070 $ 35,105

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets, Net	12 Months Ended
	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets, Net	6. GOODWILL AND OTHER INTANGIBLE ASSETS, NET The carrying amount of goodwill at December 31, 2023, and December 31, 2022, was $14.2 million for Trex Residential. For fiscal years 2023, 2022 and 2021, the Company completed its annual impairment test of goodwill for its residential reporting unit in Trex Residential utilizing the qualitative assessment and concluded it was not more likely than not that the fair value of the residential reporting unit was less than its carrying amount. For fiscal year 2021, the Company elected to perform the impairment test of goodwill for its commercial railing reporting unit and its staging reporting unit utilizing the quantitative assessment. The Company performed a quantitative assessment primarily due to a reduction in project commitments, which adversely impacted project backlog and forecasted net sales and EBITDA. The reduction in project commitments was influenced by a continued delay in new projects due to lingering uncertainty created in the commercial railing and staging markets by the COVID-19 pre-pandemic rate. The Market Approach uses prices and other relevant information generated by market transactions involving identical or comparable assets, liabilities or a group of assets and liabilities, such as a business. Using these methodologies resulted in the recognition of an impairment loss of the total amount of goodwill of $42.5 million and $11.8 million at its commercial railing and staging reporting units, respectively. The impairment loss was the amount by which the carrying amount exceeded the fair value of each reporting unit, not to exceed the amount of goodwill of each reporting unit. The Company also considered the income tax effects from any tax-deductible Level 3 inputs used to determine the fair value of each reporting unit include management’s future cash flow projections, a weighted average cost of capital and a residual growth rate. The cash flows used to determine fair value are dependent on a number of significant management assumptions, such as expectations of future performance and the expected future economic environment, which are partly based on historical experience. Differences between actual and expected results may be material and dependent on future actions and plans. The discount rate and the residual growth rate are based on management’s judgment of the rates that would be utilized by a hypothetical market participant. The use of different assumptions, estimates or judgments, including the estimated future cash flows, the discount rate used to discount estimated cash flows to their net present value, and the residual growth rate, could materially increase or decrease the fair value of the reporting unit and, accordingly, could materially increase or decrease related impairment charges. The Company’s intangible assets, purchased in 2018, consist of domain names for Trex Residential. At December 31, 2023, and December 31, 2022, intangible assets were $6.3 million and accumulated amortization was $2.4 million and $1.9 million, respectively. Intangible asset amounts were determined based on the estimated economics of the asset and are amortized over the estimated useful lives on a straight-line basis over 15 years, which approximates the pattern in which the economic benefits are expected to be received. The Company evaluates the recoverability of intangible assets periodically and considers events or circumstances that may warrant revised estimates of useful lives or that may indicate an impairment. Intangible asset amortization expense for the year ended December 31, 2023, December 31, 2022, and December 31, 2021, was $0.4 million, $0.4 million, and $0.4 million, respectively.

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	7. PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment consist of the following as of December 31 (in thousands): 2023 2022 Machinery and equipment $ 545,037 $ 529,975 Building and improvements 145,821 120,116 Forklifts and tractors 24,646 24,516 Computer equipment 18,497 16,182 Furniture and fixtures 9,489 6,180 Construction in process 247,659 161,035 Land 29,143 24,886 Total property, plant and equipment 1,020,292 882,890 Accumulated depreciation (310,890 ) (292,998 ) Total property, plant and equipment, net $ 709,402 $ 589,892 The Company had construction in process as of December 31, 2023, of approximately $248 million. The Company expects that substantially all of the above noted construction in process will be completed and put into service during or before the year ending December 31, 2026. Depreciation expense for the years ended December 31, 2023, 2022, and 2021, was $49.8 million, $43.9 million, and $35.5 million, respectively.

Accrued Expenses and Other Liab

Accrued Expenses and Other Liabilities	12 Months Ended
	Dec. 31, 2023
Payables and Accruals [Abstract]
Accrued Expenses and Other Liabilities	8. ACCRUED EXPENSES AND OTHER LIABILITIES Accrued expenses and other liabilities consist of the following as of December 31 (in thousands): 2023 2022 Sales and marketing $ 15,496 $ 19,194 Compensation and benefits 25,859 8,646 Operatin lease liabilitie 7,663 7,488 Manufacturing costs 3,382 3,425 Other 4,334 5,311 Total accrued expenses and other liabilities $ 56,734 $ 44,064

Debt

Debt	12 Months Ended
	Dec. 31, 2023
Debt Disclosure [Abstract]
Debt	9. DEBT Revolving Credit Facility Indebtedness Prior to December 22, 2022 Under the Credit Agreement, the Lenders agreed to provide the Company with one or more Revolving Loans in a collective maximum principal amount of $400,000,000 (Loan Limit) throughout the term, which ends May 18, 2027 (Term). Included within the Loan Limit are sublimits for a Letter of Credit facility in an amount not to exceed $60,000,000; and Swing Line Loans in an aggregate principal amount at any time outstanding not to exceed $20,000,000. The Revolving Loans, the Letter of Credit facility and the Swing Line Loans are for the purpose of raising working capital and supporting general business operations. The Credit Agreement provides the Company, in the aggregate, the ability to borrow an amount up to the Loan Limit during the Term. The Company is not obligated to borrow any amount under the Loan Limit. Within the Loan Limit, the Company may borrow, repay and reborrow at any time or from time to time while the Notes are in effect. Base Rate Loans (as defined in the Credit Agreement) under the Revolving Loans and the Swing Line Loans accrue interest at the Base Rate plus the Applicable Rate (as defined in the Credit Agreement) and Term SOFR Loans for the Revolving Loans accrue interest at the rate per annum equal to the sum of Term SOFR for such interest period plus the Applicable Rate (as defined in the Credit Agreement). The Base Rate for any day is a fluctuating rate per annum equal to the highest of (a) the Federal Funds Rate plus 0.50%, (b) the rate of interest in effect for such day as publicly announced from time to time by BOA as its prime rate, and (c) the Term SOFR plus 1.0% subject to certain interest rate floors. Repayment of all then outstanding principal, interest, fees and costs is due at the end of the Term. The Company and BofA Securities, as a sustainability coordinator, are entitled to establish specified key performance indicators (KPIs) with respect to certain environmental, social and governance targets of the Company and its subsidiaries. The sustainability coordinator and the Company may amend the Credit Agreement for the purpose of incorporating the KPIs and other related provisions, unless the Lenders object to such amendment on or prior to the date that is ten business days adjustments (increase, decrease or no adjustment) to otherwise applicable pricing will be made; provided that the amount of such adjustments shall not exceed certain aggregate caps as in the definitive loan documentation. Under the terms of the Security and Pledge Agreement, the Company and Trex Commercial, subject to certain permitted encumbrances, as collateral security for the above-stated loans and all other present and future indebtedness of the Company owing to the Lenders grants to BOA, as Administrative Agent for the Lenders, a continuing security interest in certain collateral described and defined in the Security and Pledge Agreement but excluding the Excluded Property (as defined in the Security and Pledge Agreement). Indebtedness On and After December 22, 2022 Under the First Amendment, the Lenders agreed to provide the Company with a Revolving B Loan consisting of one or more revolving loans in a collective maximum principal amount of $150,000,000 (Revolving B Loan Limit) throughout the term, which ends December 22, 2024 (Revolving B Loan Term). Previously, under the Credit Agreement, there was no Revolving B Loan. The First Amendment also provided that TD would serve as Syndication Agent. As of December 22, 2022, the Credit Agreement was amended and restated to refer to this loan as the Revolving A Loan. The amended and restated Credit Agreement was made an Exhibit A to the First Amendment. All of the terms of the Credit Agreement apply to the Revolving B Loan. The Credit Agreement continues to include sublimits under the Revolving A Loan for a Letter of Credit facility in an amount not to exceed $60,000,000; and Swing Line Loans in an aggregate principal amount at any time outstanding not to exceed $20,000,000. The Revolving Loans, the Letter of Credit facility and the Swing Line Loans under Revolving A Loan are for the purpose of raising working capital and supporting general business operations. The Notes provide the Company, in the aggregate, the ability to borrow an amount up to the Revolving A Loan Limit during the Revolving A Loan Term and Revolving B Loan Limit during the Revolving B Loan Term. The Company is not obligated to borrow any amount under the revolving loans. Within the respective loan limit, the Company may borrow, repay and reborrow at any time or from time to time while the Notes are in effect. With respect to Revolving B Loans, for any day, the rate per annum is a tiered pricing based upon the Consolidated Debt to Consolidated EBITDA Ratio. The applicable rate for Revolving B Loans that are Base Rate Loans range between1.20% and 2.15 The Company had $5.5 million in borrowings outstanding under its revolving credit facility and available borrowing capacity of $544.5 million at December 31, 2023. The weighted average interest rate on the revolving credit facility was 6.25% as of December 31, 2023. Compliance with Debt Covenants and Restrictions Pursuant to the terms of the Credit Agreement, the Company is subject to certain loan compliance covenants. The Company was in compliance with all covenants as of December 31, 2023. Failure to comply with the financial covenants could be considered a default of repayment obligations and, among other remedies, could accelerate payment of any amounts outstanding.

Leases

Leases	12 Months Ended
	Dec. 31, 2023
Leases [Abstract]
Leases	10. LEASES For the years ended December 31, 2023, and December 31, 2022, total operating lease cost was $8.0 million and $8.4 million, respectively. The weighted average remaining lease term at December 31, 2023 and December 31, 2022 was 4.4 years and 5.2 years, respectively. The weighted average discount rate at December 31, 2023 and December 31, 2022 was 2.32% and 2.10%, respectively. The following table includes supplemental cash flow information for the years ended December 31, 2023, December 31, 2022, and December 31, 2021 and supplemental balance sheet information at December 31, 2023 and December 31, 2022 related to operating leases (in thousands): Supplemental Cash Flow Information For the Year Ended 2023 2022 2021 Cash paid for amounts included in the measurement of operating lease liabilities $ 8,176 $ 8,688 $ 8,280 Operating ROU assets obtained in exchange for lease liabilities $ 2,559 $ 8,064 $ 7,295 Supplemental Balance Sheet Information December 31, 2023 December 31, 2022 Operating lease ROU assets $ 26,233 $ 30,991 Operating lease liabilities: Accrued expenses and other current liabilities $ 7,663 $ 7,488 Operating lease liabilities 18,840 23,974 Total operating lease liabilities $ 26,503 $ 31,462 The following table summarizes maturities of operating lease liabilities at December 31, 2023 (in thousands): Maturities of operating lease liabilities 2024 $ 7,763 2025 5,749 2026 4,891 2027 4,486 2028 3,948 Thereafter 933 Total lease payments $ 27,770 Less imputed interest (1,267 ) Total operating liabilities $ 26,503

Financial Instruments

Financial Instruments	12 Months Ended
	Dec. 31, 2023
Investments, All Other Investments [Abstract]
Financial Instruments	11. FINANCIAL INSTRUMENTS The Company considers the recorded value of its financial assets and liabilities, consisting primarily of cash and cash equivalents, accounts receivable, accounts payable, accrued expenses and other current liabilities, and debt to approximate the fair value of the respective assets and liabilities on the Consolidated Balance Sheets at December 31, 2023 and 2022.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2023
Equity [Abstract]
Stockholders' Equity	12. STOCKHOLDERS’ EQUITY Earnings Per Share The following table sets forth the computation of basic and diluted earnings per share (in thousands, except share and per share data): Year Ended December 31, 2023 2022 2021 Numerator: Net income $ 205,384 $ 184,626 $ 208,737 Denominator: Basic weighted average shares outstanding 108,680,459 111,710,676 115,461,016 Effect of dilutive securities: Stock appreciation rights 71,406 94,859 180,875 Restricted stock 57,538 74,953 120,952 Diluted weighted average shares outstanding 108,809,403 111,880,488 115,762,843 Basic earnings per share $ 1.89 $ 1.65 $ 1.81 Diluted earnings per share $ 1.89 $ 1.65 $ 1.80 Diluted earnings per share is computed using the weighted average number of shares determined for the basic earnings per share computation plus the dilutive effect of common stock equivalents using the treasury stock method. The computation of diluted earnings per share excludes the following potentially dilutive securities because the effect would be anti-dilutive: Year Ended December 31, 2023 2022 2021 Restricted stock 52,323 48,851 6,296 Stock appreciation rights 93,163 52,107 12,602 Stock Repurchase Program On February 16, 2018, the Board of Directors adopted the 2018 Stock Repurchase Program of up to 11.6 million shares of the Company’s outstanding common stock (Stock Repurchase Program). During 2023, the Company did not repurchase shares of its outstanding common stock under the Stock Repurchase Program. On May 4, 2023, the Trex Board of Directors adopted a new stock repurchase program (2023 Stock Repurchase Program) of up to 10.8 million shares of its outstanding common stock, and terminated the existing Stock Repurchase Program. The 2023 Stock Repurchase Program has no set expiration date. The Company repurchased 264,896 shares of its outstanding common stock under the 2023 Stock Repurchase Program during 2023.

Revenue From Contracts With Cus

Revenue From Contracts With Customers	12 Months Ended
	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Revenue From Contracts With Customers	13. REVENUE FROM CONTRACTS WITH CUSTOMERS Topic 606 provides a single, comprehensive model for revenue recognition arising from contracts with customers. A performance obligation is a promise in a contract to transfer a distinct good or service to the customer and is the unit of account in Topic 606. A contract’s transaction price is allocated to each distinct performance obligation and revenue is recognized when or as the Company satisfies the performance obligation. Revenue is recognized at an amount that reflects the consideration to which the entity expects to be entitled in exchange for transferring control of the goods or services to a customer. Trex Residential Products Trex Residential principally generates revenue from the manufacture and sale of its high-performance, low-maintenance, eco-friendly For each product shipped, the transaction price by product is specified in the purchase order. The Company recognizes revenue on the transaction price less any amount offered under a sales incentive program. The Company recognizes an account receivable for the amount of revenue recognized as it has an unconditional right to consideration at the time of shipment and payment from the customer is due based solely on the passage of time. The Company receives payments from its customers based on the payment terms applicable to each individual contract and the customer pays in accordance with the billing terms specified in the purchase order, which is less than one year. The related accounts receivables are included in “Accounts receivable, net” in the Consolidated Balance Sheets. Trex Residential may offer various sales incentive programs throughout the year. It estimates the amount of sales incentive to allocate to each performance obligation, or product shipped, based on direct sales to the customer. The estimate is updated each reporting period and any changes are allocated to the performance obligations on the same basis as at inception. Changes in estimate allocated to a previously satisfied performance obligation are recognized as a reduction of revenue in the period in which the change occurs under the cumulative catch-up Trex Residential pays commissions to certain employees. However, the sales commissions are not directly attributable to identifiable contracts, are discretionary in nature and are based on other factors not related to obtaining a contract, such as individual performance, profitability of the entity, annual sales targets, etc. These costs are included in selling, general and administrative expenses as incurred. Trex Residential does not grant contractual product return rights to customers other than pursuant to its assurance product warranty (see related disclosure on product warranties in Note 18, “Commitments and Contingencies”. Trex Residential accounts for all shipping and handling fees invoiced to the customer in net sales and the related costs in cost of sales. Trex Commercial Products On December 30, 2022, the Company completed the sale of its wholly-owned subsidiary and reportable segment, Trex Commercial. Prior to December 30, 2022, Trex Commercial generated revenue from the manufacture and sale of its modular and architectural railing and staging systems. All of its revenues were from fixed-price contracts with customers. Trex Commercial contracts had a single performance obligation as the promise to transfer the individual goods or services was not separately identifiable from other promises in the contract and was, therefore, not distinct. Trex Commercial satisfied its performance obligation over time as work progressed because control transferred continuously to its customers. Revenue and estimated profit was recognized over time based on the proportion of actual costs incurred to date relative to total estimated costs at completion to measure progress toward satisfying the performance obligation. Incurred costs represent work performed, which corresponds with, and thereby best depicts, the transfer of control to the customer. Incurred costs included all direct material, labor, subcontract and certain indirect costs. The Company reviewed and updated its estimates regularly and recognized adjustments in estimated profit on contracts under the cumulative catch-up The Company recognized an account receivable for satisfied performance obligations as it had an unconditional right to consideration and payment from the customer was due based solely on the passage of time. The Company received payments from its customers on the accounts receivable based on the payment terms applicable to each individual contract and the customer paid in less than one year. In addition, the timing of revenue recognition, billings and cash collections resulted in revenues in excess of billings and contract retainage (contract assets), and billings in excess of revenues and customer deposits (contract liabilities). These assets and liabilities were reported on a contract-by-contract Trex Commercial paid sales commissions that were directly attributable to identifiable contracts to certain of its employees. If the amortization period of the commission was one year or less, then the Company recognized the commission expense as incurred. Otherwise, the Company capitalized the commission and amortized it on a straight-line basis over the life of the contract. Trex Commercial did not grant contractual product return rights to customers other than pursuant to its assurance product warranty. All shipping and handling fees invoiced to the customer were included in net sales and the related costs were included in cost of sales. For each year in the three years ended December 31, 2023, net sales are disaggregated in the following tables by (1) market (2) timing of revenue recognition, and (3) type of contract. The tables also include a reconciliation of the respective disaggregated net sales with the Company’s reportable segments (in thousands): Year Ended December 31, 2023 Trex Total Timing of Revenue Recognition and Type of Contract Products transferred at a point in time and variable consideration contracts $ 1,094,837 $ 1,094,837 $ 1,094,837 $ 1,094,837 Year Ended December 31, 2022 Reportable Segment Trex Residential Trex Commercial Total Timing of Revenue Recognition and Type of Contract Products transferred at a point in time and variable consideration contracts $ 1,059,536 $ —  $ 1,059,536 Products transferred over time and fixed price contracts —  46,507 46,507 $ 1,059,536 $ 46,507 $ 1,106,043 Year Ended December 31, 2021 Reportable Segment Trex Residential Trex Commercial Total Timing of Revenue Recognition and Type of Contract Products transferred at a point in time and variable consideration contracts $ 1,139,266 $ —  $ 1,139,266 Products transferred over time and fixed price contracts —  57,686 57,686 $ 1,139,266 $ 57,686 $ 1,196,952

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2023
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	14. STOCK-BASED COMPENSATION At the annual meeting of stockholders of the Company held on May 4, 2023, the Company’s stockholders approved the Trex Company, Inc. 2023 Stock Incentive Plan (Plan). The Company’s board of directors unanimously approved the Plan on April 10, 2023, subject to stockholder approval. The Plan amends and restates in its entirety the Trex Company, Inc. 2014 Stock Incentive Plan (2014 Plan), which was last approved by the Company’s stockholders at the annual meeting held on April 30, 2014. The Plan, which will be administered by the compensation committee of the board of directors, provides for the grant of stock options, restricted stock, restricted stock units, stock appreciation rights and unrestricted stock, which are referred to collectively as “awards.” Awards may be granted under the Plan to officers, directors (including non-employee The Company recognizes stock-based compensation expense ratably over the period from grant date to the earlier of (1) the vesting date of the award, or (2) the date the grantee is eligible to retire without forfeiting the award. For performance-based restricted stock and performance-based restricted stock units, expense is recognized ratably over the performance and vesting period of each tranche based on management’s judgment of the ultimate award that is probable to be paid out based on the achievement of the predetermined performance measures. For the employee stock purchase plan, compensation expense is recognized related to the discount on purchases. The following table summarizes the Company’s stock-based compensation expense (in thousands): Year Ended December 31, 2023 2022 2021 Time-based restricted stock and restricted stock units $ 3,897 $ 3,783 $ 2,892 Performance-based restricted stock and restricted stock units 4,836 540 4,681 Stock appreciation rights 908 792 485 Employee stock purchase plan 523 214 381 Total stock-based compensation $ 10,164 $ 5,329 $ 8,439 Stock-based compensation expense is included in “Selling, general and administrative expenses” in the accompanying Consolidated Statements of Comprehensive Income. Time-Based Restricted Stock and Time-Based Restricted Stock Units The fair value of time-based restricted stock and time-based restricted stock units is determined based on the closing price of Trex shares on the grant date. Time-based restricted stock and time-based restricted stock units vest based on the terms of the awards. Unvested time-based restricted stock and unvested time-based restricted stock units are generally forfeitable upon the resignation of employment or termination of employment with cause. The total fair value of vested time-based restricted shares and vested time-based restricted stock units for the years ended December 31, 2023, 2022, and 2021 was $4.7 million, $3.7 million, and $8.2 million, respectively. At December 31, 2023, there was $5.0 million of total compensation expense related to unvested time-based restricted stock and unvested time-based restricted stock units remaining to be recognized over a weighted-average period of approximately 1.7 years. Time-based restricted stock and restricted stock unit activity under the Plan and all predecessor stock incentive plans is as follows: Time-based Restricted Stock and Restricted Stock Unit Weighted- Grant Price Per Share Nonvested at December 31, 2020 160,722 $ 35.68 Granted 33,703 $ 100.50 Vested (78,081 ) $ 37.81 Forfeited (4,798 ) $ 66.00 Nonvested at December 31, 2021 111,546 $ 52.91 Granted 57,094 $ 75.06 Vested (56,719 ) $ 58.13 Forfeited (1,286 ) $ 86.84 Nonvested at December 31, 2022 110,635 $ 61.28 Granted 97,177 $ 58.50 Vested (81,080 ) $ 56.52 Forfeited (10,228 ) $ 66.19 Nonvested at December 31, 2023 116,504 $ 65.00 Performance-based Restricted Stock and Performance-Based Restricted Stock Units The fair value of performance-based restricted stock and performance-based restricted stock units is determined based on the closing price of Trex shares on the grant date. Unvested performance-based restricted stock and unvested performance-based restricted stock units are generally forfeitable upon the resignation of employment or termination of employment with cause. The performance-based restricted shares and performance-based restricted stock units have a three-year vesting period, vesting one-third Performance-based restricted stock activity under the Plan is as follows: Performance-based Restricted Stock and Performance-based Restricted Stock Units Weighted- Average Grant Price Per Share Nonvested at December 31, 2020 72,570 $ 43.42 Granted 36,522 $ 86.26 Vested (45,051 ) $ 39.41 Forfeited (6,273 ) $ 65.30 Nonvested at December 31, 2021 57,768 $ 71.21 Granted 72,152 $ 76.14 Vested (57,875 ) $ 64.43 Forfeited (562 ) $ 82.95 Nonvested at December 31, 2022 71,483 $ 81.57 Granted 96,103 $ 56.79 Vested (30,038 ) $ 66.26 Forfeited (28,163 ) $ 74.39 Nonvested at December 31, 2023 109,385 $ 65.92 Stock Appreciation Rights SARs are granted with a grant price equal to the closing market price of the Company’s common stock on the date of grant. These awards expire ten years after the date of grant and vest based on the terms of the individual awards. The SARs are generally forfeitable upon the resignation of employment or termination of employment with cause. The Company recognizes forfeitures as they occur. The Company recognizes compensation cost on a straight-line basis over the vesting period for the award. As of December 31, 2023, there was $2.3 million of unrecognized compensation cost related to SARs. The fair value of each SAR is estimated on the date of grant using a Black-Scholes option-pricing model. For SARs issued in the years ended December 31, 2023, December 31, 2022, and December 31, 2021, respectively, the assumptions shown in the following table were used: Year Ended December 31, 2023 2022 2021 Dividend yield 0 % 0 % 0 % Average risk-free interest rate 4.0 % 1.9 % 0.6 % Expected term (years) 5 5 5 Expected volatility 49.5 % 44.9 % 58.7 % Dividend Yield. Average Risk-Free Interest Rate. Expected Term. Expected Volatility. The weighted-average grant date fair value of SARs granted during the years ended December 31, 2023, December 31, 2022, and December 31, 2021 was $27.19, $33.90, and $51.84, respectively. SAR activity under the Plan and all predecessor stock incentive plans is as follows: SARs Weighted- Grant Price Per Share Weighted- Remaining Contractual Life (Years) Aggregate Intrinsic Value as of December 31, 2021 Outstanding at December 31, 2020 293,276 $ 22.15 Granted 15,029 $ 104.56 Exercised (102,562 ) $ 9.45 Canceled (4,745 ) $ 61.66 Outstanding at December 31, 2021 200,998 $ 33.86 Granted 32,971 $ 82.01 Exercised —  $ —  Canceled —  $ —  Outstanding at December 31, 2022 233,969 $ 40.64 Granted 51,916 $ 56.80 Exercised (53,036 ) $ 11.95 Canceled (12,969 ) $ 75.25 Outstanding at December 31, 2023 219,880 $ 49.34 6.3 $ 6,393,512 Vested at December 31, 2023 150,657 $ 41.54 5.0 $ 6,378,706 Exercisable at December 31, 2023 150,657 $ 41.54 5.0 $ 6,378,706 Employee Stock Purchase Plan The Company has an employee stock purchase plan (ESPP) that permits eligible employees to purchase shares of common stock of the Company at a purchase price which is the lesser of 85% of the market price on either the first day of the calendar quarter or the last day of the calendar quarter. Eligible employees may elect to participate in the plan by authorizing payroll deductions of up to 15% of gross compensation for each payroll period. On the last day of each quarter, each participant’s contribution account is used to purchase the maximum number of whole shares of common stock determined by dividing the contribution account balance by the purchase price. The aggregate number of shares of common stock that may be purchased under the plan is 2,400,000. Through December 31, 2023, employees had purchased approximately 1,897,771 shares under the plan.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2023
Postemployment Benefits [Abstract]
Employee Benefit Plans	15. EMPLOYEE BENEFIT PLANS At December 31, 2023 the Company has a 401(k) Profit Sharing Plan for the benefit of its employees who meet certain eligibility requirements and it matches qualifying employee contributions. The Company’s contributions to the plans totaled $6.8 million, $8.1 million, and $6.6 million, for the years ended December 31, 2023, 2022, and 2021, respectively.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Income Taxes	16. INCOME TAXES Income tax provision (benefit) consists of the following (in thousands): Year Ended December 31, 2023 2022 2021 Current income tax provision: Federal $ 52,634 $ 28,830 $ 30,450 State 13,996 9,126 15,192 66,600 37,956 45,642 Deferred income tax provision: Federal 2,869 20,000 21,607 State 1,346 4,256 (595 ) 4,215 24,256 21,012 Total income tax provision $ 70,815 $ 62,212 $ 66,654 The Company’s effective tax rate for the year ended December 31, 2023, was 25.6% and was comparable to the effective tax rate for the year ended December 31, 2022, of 25.2%, which resulted in income tax expense of $70.8 million and $62.2 million, respectively. The income tax provision differs from the amount of income tax determined by applying the U.S. Federal statutory rate to income before taxes as a result of the following (in thousands): Year Ended December 31, 2023 2022 2021 U.S. Federal statutory taxes $ 58,002 $ 51,836 $ 57,832 State and local taxes, net of U.S. Federal benefit 12,296 10,608 12,174 Permanent items 1,320 (208 ) 1,208 Excess tax benefits from vesting or settlement of stock compensation awards (656 ) (11 ) (2,868 ) Federal credits (755 ) (598 ) (686 ) Other 608 585 (1,006 ) Total income tax provision $ 70,815 $ 62,212 $ 66,654 Deferred tax assets and liabilities consist of the following (in thousands): As of December 31, 2023 2022 Deferred tax assets: Operating lease liability 6,886 7,941 Product and surface flaking warranty reserves 5,645 6,469 State tax credit carryforwards 4,250 4,084 Deferred revenue 4,215 2,921 Tax Cut and Jobs Act capitalization of research and development costs 3,956 2,152 Stock-based compensation 2,361 1,146 Inventories 639 2,965 Accruals not currently deductible and other —  373 Net Operating Losses —  132 Gross deferred tax assets, before valuation allowance 27,952 28,183 Valuation allowance (3,307 ) (3,026 ) Gross deferred tax assets, after valuation allowance 24,645 25,157 Deferred tax liabilities: Depreciation (74,794 ) (74,604 ) Inventories (10,627 ) (6,749 ) Operating lease right-of-use (6,677 ) (7,687 ) Goodwill amortization (3,536 ) (2,879 ) Other (1,450 ) (1,462 ) Gross deferred tax liabilities (97,084 ) (93,381 ) Net deferred tax liability $ (72,439 ) $ (68,224 ) The Company recognizes deferred tax assets and liabilities based on the difference between the financial statement basis and tax basis of assets and liabilities using enacted tax laws and statutory tax rates. In accordance with accounting standards, the Company assesses the likelihood that its deferred tax assets will be realized. Deferred tax assets are reduced by a valuation allowance when, after considering all available positive and negative evidence, it is determined that it is more likely than not that some portion, or all, of the deferred tax asset will not be realized, primarily certain state income tax credits. As of December 31, 2023, the Company had a valuation allowance of $3.3 million against deferred tax assets it estimates will not be realized. The Company will analyze its position in subsequent reporting periods, considering all available positive and negative evidence, in determining the expected realization of its deferred tax assets. The Company recognizes interest and penalties related to tax matters as a component of “Selling, general and administrative expenses” in the accompanying Consolidated Statements of Comprehensive Income. As of December 31, 2023, the Company has identified no uncertain tax position and, accordingly, has not recorded any unrecognized tax benefits or associated interest and penalties. The Company operates in multiple tax jurisdictions and, in the normal course of business, its tax returns are subject to examination by various taxing authorities. Such examinations may result in future assessments by these taxing authorities, and the Company has accrued a liability when it believes that it is not more likely than not that it will realize the benefits of tax positions that it has taken or for the amount of any tax benefit that exceeds the cumulative probability threshold in accordance with accounting standards. As of December 31, 2023, for certain tax jurisdictions, tax years 2019 through 2023 remain subject to examination. The Company believes that adequate provisions have been made for all tax returns subject to examination. Sales made to foreign distributors are not taxable in any foreign jurisdictions as the Company does not have a taxable presence.

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2023
Segment Reporting [Abstract]
Segment Information	17. SEGMENT INFORMATION Through December 30, 2022, the Company operated in two reportable segments. On December 30, 2022, the Company completed the sale of its wholly-owned subsidiary and reportable segment, Trex Commercial. Subsequent to the sale of Trex Commercial, the Company operates in one reportable segment, Trex Residential. • Trex Residential manufactures composite decking and railing and related products marketed under the brand name Trex ® • Trex Commercial designed, engineered, and marketed modular and architectural railing and staging systems for the commercial and multi-family market, including sports stadiums and performing arts venues. The segment’s products were sold through architects, specifiers, contractors, and others doing business within the segment’s commercial market. On December 30, 2022, the Company completed the sale of Trex Commercial. Refer to Note 3 to these consolidated financial statements for additional information on the sale of Trex Commercial. The Company’s reportable segments are determined in accordance with its internal management structure, which, through December 30, 2022, was based on residential and commercial operations. The Company evaluates performance of each segment primarily based on net sales and earnings before interest, taxes, depreciation, and amortization (EBITDA). The Company uses net sales to assess performance and allocate resources as this measure represents the amount of business the segment engaged in during a given period of time, is an indicator of market growth and acceptance of segment products and represents the segment’s customers’ spending habits along with the amount of product the segment sells relative to its competitors. The Company uses EBITDA to assess performance and allocate resources because it believes that EBITDA facilitates performance comparison between the segments by eliminating interest, taxes, and depreciation and amortization charges to income. Segment Data (in thousands): Net Sales Net Income EBITDA Depreciation and Amortization Income Tax Expense / Capital Expenditures Total Assets December 31, 2023 Trex Residential $ 1,094,837 $ 205,384 $ 326,393 $ 50,189 $ 70,815 $ 166,089 $ 932,885 Consolidated $ 1,094,837 $ 205,384 $ 326,393 $ 50,189 $ 70,815 $ 166,089 $ 932,885 December 31, 2022 Trex Residential $ 1,059,536 $ 200,876 $ 311,259 $ 43,173 $ 67,313 $ 175,904 $ 933,705 Trex Commercial 46,507 (16,250 ) (20,226 ) 1,125 (5,101 ) 324 —  Consolidated $ 1,106,043 $ 184,626 $ 291,033 $ 44,298 $ 62,212 $ 176,228 $ 933,705 December 31, 2021 Trex Residential $ 1,139,266 $ 247,059 $ 361,485 $ 34,941 $ 79,500 $ 157,568 $ 881,225 Trex Commercial 57,686 (38,322 ) (50,163 ) 1,005 (12,846 ) 1,826 39,096 Consolidated $ 1,196,952 $ 208,737 $ 311,322 $ 35,946 $ 66,654 $ 159,394 $ 920,321 (1) For the year ended December 31, 2022, consolidated net income and net loss at Trex Commercial includes a loss on sale of Trex Commercial on December 30, 2022, of $15.4 million. For the year ended December 31, 2021, consolidated net income and net loss at Trex Commercial includes a goodwill impairment charge of $54.2 million. Reconciliation of Net Income (Loss) to EBITDA (in thousands): Net Income / Interest Expense / Income Tax Expense / Depreciation and Amortization EBITDA December 31, 2023 Trex Residential $ 205,384 $ 5 $ 70,815 $ 50,189 $ 326,393 Consolidated $ 205,384 $ 5 $ 70,815 $ 50,189 $ 326,393 December 31, 2022 Trex Residential $ 200,876 $ (103 ) $ 67,313 $ 43,173 $ 311,259 Trex Commercial (16,250 ) —  (5,101 ) 1,125 (20,226 ) Consolidated $ 184,626 $ (103 ) $ 62,212 $ 44,298 $ 291,033 December 31, 2021 Trex Residential $ 247,059 $ (15 ) $ 79,500 $ 34,941 $ 361,485 Trex Commercial (38,322 ) —  (12,846 ) 1,005 (50,163 ) Consolidated $ 208,737 $ (15 ) $ 66,654 $ 35,946 $ 311,322

Seasonality

Seasonality	12 Months Ended
	Dec. 31, 2023
Text Block [Abstract]
Seasonality	18. SEASONALITY The operating results for Trex Residential have historically varied from quarter to quarter. Seasonal, erratic, or prolonged adverse weather conditions may reduce the level of home improvement and construction activity and can shift demand for its products to a later period. As part of its normal business practice and consistent with industry practice, Trex Residential has historically offered incentive programs to its distributors and dealers to build inventory levels before the start of the prime deck-building season in order to ensure adequate availability of its product to meet anticipated seasonal consumer demand. The seasonal effects are often offset by the positive effect of the incentive programs.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	19. COMMITMENTS AND CONTINGENCIES Legal Matters The Company has lawsuits, as well as other claims, pending against it which are ordinary routine litigation and claims incidental to the business. Management has evaluated the merits of these lawsuits and claims and believes that their ultimate resolution will not have a material effect on the Company’s consolidated financial condition, results of operations, liquidity, or competitive position. Purchase Commitments The Company fulfills requirements for raw materials under both purchase orders and supply contracts. In the year ended December 31, 2023, the Company purchased reclaimed wood fiber requirements under purchase orders and long-term supply commitments not exceeding four years. All of the Company’s scrap polyethylene, aluminum and stainless-steel purchases are under short-term supply contracts that may average approximately one year, for which pricing is negotiated as needed, or under purchase orders that do not involve long-term supply commitments. The wood and polyethylene supply contracts generally provide that the Company is obligated to purchase all wood or polyethylene a supplier provides, if the wood or polyethylene meets certain specifications. The amount of wood and polyethylene the Company is required to purchase under these contracts varies with the production of its suppliers and, accordingly, is not fixed or determinable. As of December 31, 2023, the Company has purchase commitments under material supply contracts of $42.6 million for the year ending December 31, 2024, and a total of $60 million for the years ending December 31, 2025 through 2027. Product Warranty The Company warrants that for the applicable warranty period its Trex Residential products, when properly installed, used and maintained, will be free from material defects in workmanship and materials and its decking, cladding, fascia and railing products will not split, splinter, rot or suffer structural damage from termites or fungal decay. Products sold on or after January 1, 2023: The warranty period for residential use is 50 years for Transcend ® ® ® ® Products sold prior to January 1, 2023: The warranty period is 25 years for residential use and 10 years for commercial use. With respect to Trex Signature railing, the warranty period is 25 years for both residential and commercial use. The Company further warrants that Trex Transcend, Trex Enhance, Trex Select and Universal Fascia products will not fade in color more than a certain amount and will be resistant to permanent staining from food substances or mold, provided the stain is cleaned within seven days of appearance, for the warranty period referred to above. If there is a breach of such warranties, the Company has an obligation either to replace the defective product or refund the purchase price. The Company maintains a warranty reserve for the settlement of its product warranty claims. The Company accrues for the estimated cost of product warranty claims at the time revenue is recognized based on such factors as historical claims experience and future claims experience. Management reviews and adjusts these estimates, if necessary, based on the differences between actual experience and historical estimates. Additionally, the Company accrues for warranty costs associated with occasional or unanticipated product quality issues if a loss is probable and can be reasonably estimated, as necessary. Trex Residential continues to receive and settle claims for decking products manufactured at its Nevada facility prior to 2007 that exhibit surface flaking and maintains a warranty reserve to provide for the settlement of these claims. Estimating the warranty reserve for surface flaking claims requires management to estimate (1) the number of claims to be settled with payment and (2) the average cost to settle each claim. To estimate the number of claims to be settled with payment, the Company utilizes actuarial techniques to determine a reasonable possible range of claims to be received and the percentage of those claims that will ultimately require payment (collectively, elements). Estimates for these elements are quantified using a range of assumptions derived from claim count history and the identification of factors influencing the claim counts to determine its best estimate of future claims for which to record a related liability. The cost per claim varies due to a number of factors, including the size of affected decks, the availability and type of replacement material used, the cost of production of replacement material and the method of claim settlement. The Company monitors surface flaking claims activity each quarter for indications that its estimates require revision. Typically, a majority of surface flaking claims received in a year are received during the summer outdoor season, which spans the second and third quarters. It has been the Company’s practice to utilize the actuarial techniques discussed above during the third quarter, after a significant portion of all claims has been received for the fiscal year and variances to annual claims expectations are more meaningful. Average cost per claim experienced in the year ended December 31, 2023, was lower than that experienced in the year ended December 31, 2022, which was elevated due to the closure of three large claims, and lower than the Company’s expectations for 2023. The number of incoming claims received in the year ended December 31, 2023, was lower than the number of claims received in the year ended December 31, 2022, and lower than the Company’s expectations for 2023. After evaluating the declining trend in incoming claims in its actuarial analysis, the Company decreased the estimate of the number of future claims to be settled with payment. As a result of the decrease in estimated future claims, in the three-month period ended September 30, 2023, the Company recorded a reduction of $3.8 million to its warranty reserve for the future settlement of surface flaking claims. The Company believes the reserve at December 31, 2023 is sufficient to cover future surface flaking obligations. The Company’s analysis is based on currently known facts and a number of assumptions, as discussed above, and current expectations. Projecting future events such as the number of claims to be received, the number of claims that will require payment and the average cost of claims could cause the actual warranty liabilities to be higher or lower than those projected, which could materially affect the Company’s financial condition, results of operations or cash flows. The Company estimates that the annual number of claims received will continue to decline over time and that the average cost per claim will increase slightly, primarily due to inflation. If the level of claims received or average cost per claim differs materially from expectations, it could result in additional increases or decreases to the warranty reserve and a decrease or increase in earnings and cash flows in future periods. The Company estimates that a 10% change in the expected number of remaining claims to be settled with payment or the expected cost to settle claims may result in approximately a $1.0 million change in the surface flaking warranty reserve. The following is a reconciliation of the Trex Residential product warranty and surface flaking reserves (in thousands): Year Ended December 31, 2023 Product Surface Flaking Total Beginning balance, January 1 $ 9,694 $ 15,905 $ 25,599 Provisions and changes in estimates 7,308 (3,800 ) 3,508 Settlements made during the period (4,936 ) (1,993 ) (6,929 ) Ending balance, December 31 $ 12,066 $ 10,112 $ 22,178 Year Ended December 31, 2022 Product Surface Flaking Total Beginning balance, January 1 $ 10,053 $ 18,542 $ 28,595 Provisions and changes in estimates 1,914 —  1,914 Settlements made during the period (2,273 ) (2,637 ) (4,910 ) Ending balance, December 31 $ 9,694 $ 15,905 $ 25,599 Trex Residential Arkansas Manufacturing Facility In October 2021, the Company announced plans to add a third U.S.-based Trex Residential manufacturing facility located in Little Rock, Arkansas, that will sit on approximately 300 acres of land. The development approach for the new campus will be modular and calibrated to demand trends for Trex Residential outdoor living products. Construction began on the new facility in the second quarter of 2022, and in July 2022, the Company entered into a design-build agreement. The Company anticipates spending approximately $450 million on the facility and the budget for the design-build agreement is contained within this amount. Construction for the new facility will be funded primarily through the Company’s ongoing cash generation or its line of credit.

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Accounts and Reserves	12 Months Ended
	Dec. 31, 2023
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Schedule II - Valuation and Qualifying Accounts and Reserves	TREX COMPANY, INC. SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS AND RESERVES (In thousands) Descriptions Balance at Beginning of Period Additions Charged to Cost and Expenses Deductions Balance at End of Period Year ended December 31, 2023: Trex Residential product warranty reserve $ 25,599 $ 3,508 $ (6,929 ) $ 22,178 Income tax valuation allowance $ 3,026 $ 281 $ —  $ 3,307 Year ended December 31, 2022: Trex Residential product warranty reserve $ 28,595 $ 1,914 $ (4,910 ) $ 25,599 Income tax valuation allowance $ 2,232 $ 794 $ —  $ 3,026 Year ended December 31, 2021: Trex Residential product warranty reserve $ 29,473 $ 3,846 $ (4,724 ) $ 28,595 Income tax valuation allowance $ 2,775 $ —  $ (543 ) $ 2,232

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
Basis of Accounting	Basis of Accounting The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States. The consolidated financial statements include the accounts of the Company. Intercompany accounts and transactions have been eliminated in consolidation. The Company’s results of operations are affected by a number of factors, including, but not limited to, the cost to manufacture and distribute products, cost of raw materials, inflation, consumer spending and preferences, interest rates, the impact of any supply chain disruptions, economic conditions, and/or any adverse effects from global health pandemics and geopolitical conflicts. Towards the end of June 2022, the Company experienced a reduction in demand from its distribution partners, spurred by concerns over a potential easing in consumer demand due to rising interest rates, declining consumer sentiment and expectations of a general slowing in the economy. As a result, beginning in the third quarter of 2022 the Company’s channel partners met demand partially through inventory drawdown rather than reordering products and maintaining current inventories. The drawdown was completed by year end 2022.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and the accompanying notes. Actual results could differ from those estimates.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash equivalents consist of highly liquid investments purchased with original maturities of three months or less.
Concentrations and Credit Risk	Concentrations and Credit Risk The Company’s financial instruments that are exposed to concentrations of credit risk consist primarily of cash and cash equivalents and trade accounts receivable. The Company from time to time may have bank deposits in excess of insurance limits of the Federal Deposit Insurance Corporation. As of December 31, 2023, substantially all deposits are maintained in one financial institution. The Company has not experienced any losses in such accounts and believes it is not exposed to any significant credit risk related to its cash and cash equivalents. The Company routinely assesses the financial strength of its customers and believes that its trade receivables credit risk exposure is limited. Trade receivables are recognized at the amount of revenue recognized on each shipment for Trex Residential products as the Company has an unconditional right to consideration from the customer and payment is due based solely on the passage of time. An estimate of expected credit losses is recognized as a valuation allowance and adjusted each reporting period. The estimate is based on the current expected credit loss model and is determined using an aging schedule, including past events, current conditions and reasonable and supportable forecasts about the future. There was no material valuation allowance recorded as of December 31, 2023 and December 31, 2022. In the years ended December 31, 2023, 2022, and 2021, sales to certain customers of Trex Residential accounted for 10% or more of the Company’s total net sales. For the year ended December 31, 2023, three customers of Trex Residential represented approximately 72% of the Company’s total net sales. For the year ended December 31, 2022, three customers of Trex Residential represented 64% of the Company’s total net sales. For the year ended December 31, 2021, three customers of Trex Residential represented approximately 61% of the Company’s total net sales. No other customer represented 10% or more of the Company’s total net sales. At December 31, 2023, three customers represented 27%, 23%, and 20%, respectively, of the Company’s total accounts receivable balance. At December 31, 2022, two customers represented 35% and 26%, respectively, of the Company’s total accounts receivable balance. For each year ended December 31, 2023, 2022, and 2021, approximately 26.7%, 17.5%, and 26%, respectively, of the Company’s materials purchases at Trex Residential were purchased from its four largest suppliers.
Inventories	Inventories Inventories for the composite decking and railing products at Trex Residential are valued at the lower of cost (last-in, first-out, A majority of the products at Trex Residential are made in a proprietary process that combines reclaimed wood fibers and scrap polyethylene. Trex Residential grinds up scrap materials generated from its manufacturing process and inventories deemed no longer salable and reintroduces the reclaimed material into the manufacturing process as a substitute for raw materials. The reclaimed material is valued at the costs of the raw material components of the material.
Property, Plant and Equipment	Property, Plant and Equipment Property, plant and equipment are stated at historical cost. The costs of additions and improvements are capitalized, while maintenance and repairs are expensed as incurred. Cash flows for capital expenditures as reported in cash flows from investing activities in the Consolidated Statements of Cash Flows are adjusted to exclude unpaid amounts accrued at period end. Depreciation is provided using the straight-line method generally over the following estimated useful lives: Buildings 40 years Machinery and equipment 3-11 years Furniture and fixtures 10 years Forklifts and tractors 5 years Computer equipment and software 5 years Leasehold improvements are amortized over the shorter of the lease term or 15 years. The Company reviews its long-lived assets, including property, plant and equipment, whenever events or changes in circumstances indicate that the carrying amount of the assets may not be fully recoverable. To determine the recoverability of its long-lived assets, the Company evaluates the probability that future estimated undiscounted net cash flows will be less than the carrying amount of the long-lived assets. If the estimated cash flows are less than the carrying amount of the long-lived assets, the assets are written down to their fair value. The Company’s estimates of anticipated cash flows and the remaining estimated useful lives of long-lived assets could be reduced in the future. As a result, the carrying amount of long-lived assets could be reduced in the future. Long-lived assets held for sale are stated at the lower of cost or fair value less cost to sell.
Leases	Leases The Company leases office space, storage warehouses, training and manufacturing facilities, and certain office and plant equipment under various operating leases. At inception of an arrangement, the Company evaluates, among other things, whether it has the right to control the use of an identified asset in order to determine if the arrangement is or contains a lease. Operating leases are included in operating lease right-of-use non-lease non-lease
Fair Value Measurement	Fair Value Measurement Assets and liabilities measured at fair value are measured at the amount that would be received for selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date and classified into one of the following fair value hierarchies: • Level 1 – Quoted prices for identical instruments in active markets. • Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model derived valuations in which all significant inputs and significant value drivers are observable in active markets. • Level 3 – Valuations derived from management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date. Consideration is given to the risk inherent in the valuation technique and the risk inherent in the inputs to the model.
Goodwill	Goodwill Goodwill represents the excess of cost over net assets acquired resulting from the Company’s 1996 purchase of the Mobil Composite Products Division, the 2011 purchase of the assets of the Iron Deck Corporation, and the 2017 purchase of certain assets and the assumption of certain liabilities of SC Company. The Company evaluates the recoverability of goodwill in accordance with Accounting Standard Codification Topic 350, “ Intangibles – Goodwill and Other The Company assigned its goodwill to reporting units and tests each reporting unit’s goodwill for impairment at least on an annual basis, or more frequently if an event occurs or circumstances change in the interim that indicate the carrying amount of reporting unit goodwill exceeds the implied fair value of that goodwill. The Company identified its reporting units based on the way it manages its operating segments. Prior to December 30, 2022, the Company had three reporting units: a residential reporting unit in the Trex Residential reportable segment, and a commercial railing reporting unit and a staging reporting unit in the Trex Commercial reportable segment. Subsequent to the sale of Trex Commercial on December 30, 2022, the Company has one reporting unit in the Trex Residential reportable segment. Each reporting unit constitutes a business with discrete financial information and operating segment management, at a level below the Company’s chief operating decision maker, regularly reviews the operating results of the reporting unit. The Company assigned goodwill to the reporting units based on the excess of the fair values acquired over the fair value of the sum of the individual assets acquired and liabilities assumed that were assigned to the reporting units. In testing for goodwill impairment, the Company first assesses qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill. If the qualitative assessment indicates that the carrying amount of the reporting unit exceeds its fair value, including goodwill, the Company is then required to perform a quantitative goodwill impairment test. The quantitative goodwill impairment test, used to identify both the existence of impairment and the amount of impairment loss, compares the fair value of a reporting unit with its carrying amount, including goodwill. The fair value of a reporting unit refers to the price that would be received to sell the unit as a whole in an orderly transaction between market participants at the measurement date. If the carrying amount of a reporting unit exceeds its fair value, an impairment loss is recognized in an amount equal to that excess, limited to the total amount of goodwill allocated to that reporting unit. The Company measures fair value of the reporting units based on a combination of the Income Approach (i.e., the Discounted Cash Flow Method) and a Market Approach. The Discounted Cash Flow Method is a multiple period discounting model in which the fair value of the reporting units are determined by discounting the projected free cash flows using an appropriate discount rate and indicates the fair value of the reporting units based on the present value of the cash flows that the reporting unit is expected to generate in the future. Significant assumptions in the Discounted Cash Flow Method include: the weighted average cost of capital (or discount rate); residual growth rate; future cash flow projections; and working capital effects. The Market Approach uses prices and other relevant information generated by market transactions involving identical or comparable assets, liabilities or a group of assets and liabilities, such as a business. Significant estimates in the Market Approach model may include identifying appropriate market multiples and assessing earnings before interest, income taxes, depreciation, and amortization (EBITDA) in estimating the fair value of the reporting units. The use of different assumptions, estimates or judgements, including estimated future cash flows and the discount rate used to discount estimated cash flows to their net present value, could materially increase or decrease the fair value of the reporting unit and impact our assessment of any goodwill impairment charges. Also, if different conditions exist in future periods, future impairment charges could result. The Company performs the annual impairment testing of its goodwill as of October 31 of each year. For fiscal years 2023, 2022 and 2021, the Company completed its annual impairment test of goodwill for its Trex Residential reporting segment residential reporting unit utilizing the qualitative assessment and concluded it was not more likely than not that the fair value of the residential reporting unit was less than its carrying amount. Qualitative factors the Company considered include events and circumstances such as macroeconomic conditions, industry and market considerations, cost factors, overall financial performance, and other relevant Company-specific events, as applicable. For fiscal year 2021, the Company determined that it was necessary to perform the goodwill impairment test for its Trex Commercial reportable segment railing and staging reporting units utilizing the quantitative assessment. The Company performed a quantitative assessment primarily due to a reduction in project commitments, which adversely impacted project backlog and forecasted net sales and EBITDA. The reduction in project commitments was influenced by a continued delay in new projects due to lingering uncertainty created in the commercial railing and staging markets by the COVID-19 pre-pandemic tax-deductible The Company uses assumptions that are consistent with those it believes a market participant would use. However, the use of different events and circumstances or different assumptions, estimates or judgements, including estimated future cash flows, and the discount rate used to discount estimated cash flows to their net present value and the residual growth rate, could materially increase or decrease the fair value of the reporting unit and impact our assessment of any goodwill impairment charge.
Product Warranty	Product Warranty The Company warrants that for the applicable warranty period its Trex Residential products, when properly installed, used and maintained, will be free from material defects in workmanship and materials and its decking, cladding, fascia and railing products will not split, splinter, rot or suffer structural damage from termites or fungal decay. Products sold on or after January 1, 2023: The warranty period for residential use is 50 years for Transcend ® years for Select ® decking and Universal Fascia, and ® ® that Trex Transcend, Trex Enhance and Trex Select decking and cladding and Universal Fascia products will not fade in color from light and weathering exposure more than a certain amount and will be resistant to permanent staining from food and beverage substances or mold and mildew, provided the stain is cleaned within seven days of appearance, for the warranty period referred to above. If there is a breach of such warranties, the Company has an obligation either to replace the defective product or refund the purchase price. Products sold prior to January 1, 2023: The warranty period is 25 years for residential use and 10 years for commercial use. With respect to Trex Signature railing, the warranty period is 25 years for both residential and commercial use. The Company further warrants that Trex Transcend, Trex Enhance, Trex Select and Universal Fascia products will not fade in color more than a certain amount and will be resistant to permanent staining from food substances or mold, provided the stain is cleaned within seven days of appearance, for the warranty period referred to above. If there is a breach of such warranties, the Company has an obligation either to replace the defective product or refund the purchase price. The Company maintains a warranty reserve for the settlement of its product warranty claims. The Company accrues for the estimated cost of product warranty claims at the time revenue is recognized based on such factors as historical claims experience and expected future claims experience. Management reviews and adjusts these estimates, if necessary, based on the differences between actual experience and historical estimates. Additionally, the Company accrues for warranty costs associated with occasional or unanticipated product quality issues if a loss is probable and can be reasonably estimated, as necessary.
Treasury Stock	Treasury Stock The Company records the repurchase of shares of its common stock at cost. These shares are considered treasury stock, which is a reduction to stockholders’ equity. Treasury stock is included in authorized and issued shares but excluded from outstanding shares.
Revenue Recognition	Revenue Recognition Trex Residential Products. low-maintenance, eco-friendly Trex Commercial Products. Trex Commercial satisfied its performance obligation over time as work progressed because control transferred continuously to its customers. Revenue and estimated profit were recognized over time based on the proportion of actual costs incurred to date relative to total estimated costs at completion to measure progress toward satisfying the performance obligation. Incurred costs represent work performed, which corresponds with, and thereby best depicts, the transfer of control to the customer. Incurred costs included all direct material, labor, subcontract and certain indirect costs. The Company reviewed and updated its estimates regularly and recognized adjustments in estimated profit on contracts under the cumulative catch-up
Insurance Proceeds	Insurance Proceeds The Company maintains insurance coverage for losses it may incur from identifiable insurable events resulting in facility repairs, incremental direct costs to serve its customers and losses in operating income from the loss in net sales. The Company recognizes a gain in the amount of any related insurance proceeds received in excess of any losses incurred. The gain on insurance proceeds is presented in a separate line item in the Consolidated Statements of Comprehensive Income. During the year ended December 31, 2021, the Company recognized gains on insurance proceeds of $8.7 million primarily related to the fire at its Virginia Facility.
Stock-Based Compensation	Stock-Based Compensation The Company measures stock-based compensation at the grant date of the award based on the fair value. For stock options, stock appreciation rights and time-based restricted stock and time-based restricted stock units, stock-based compensation is recognized on a straight-line basis over the vesting periods of the award. The Company recognizes forfeitures as they occur. For performance-based restricted stock and performance-based restricted stock units, expense is recognized ratably over the performance and vesting period of each tranche based on management’s judgment of the ultimate award that is probable to be paid out based on the achievement of predetermined performance measures. Stock-based compensation expense is included in “Selling, general and administrative expenses” in the accompanying Consolidated Statements of Comprehensive Income.
Income Taxes	Income Taxes The Company recognizes deferred tax assets and liabilities based on the difference between the financial statement basis and tax basis of assets and liabilities using enacted tax laws and statutory tax rates. The Company assesses the likelihood that its deferred tax assets will be realized. Deferred tax assets are reduced by a valuation allowance when, after considering all available positive and negative evidence, it is determined that it is more likely than not that some portion, or all, of the deferred tax asset will not be realized. As of December 31, 2023, the Company has a valuation allowance of $3.3 million against these deferred tax assets related to certain state tax credits. The Company analyzes its position in subsequent reporting periods, considering all available positive and negative evidence, in determining the expected realization of its deferred tax assets.
Research and Development Costs	Research and Development Costs Research and development costs are expensed as incurred. For the years ended December 31, 2023, 2022, and 2021, research and development costs were $3.3 million, $0.5 million, and $6.0 million, respectively, and have been included in “Selling, general and administrative expenses” in the accompanying Consolidated Statements of Comprehensive Income.
Advertising Costs	Advertising Costs The Company expenses its branding and advertising communication costs as incurred. Production costs are deferred and recognized as expense in the period that the related advertisement is first used. At December 31, 2023 and December 31, 2022, $1.8 million and $1.6 million was included in prepaid expenses for production costs, respectively. For the years ended December 31, 2023, 2022, and 2021, branding expenses, including advertising expenses as described above, were $48.8 million, $43.3 million, and $30.7 million, respectively.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Company considers the recorded value of its financial assets and liabilities, consisting primarily of cash and cash equivalents, accounts receivable, accounts payable, accrued expenses and other current liabilities, and debt to approximate the fair value of the respective assets and liabilities on the Consolidated Balance Sheets at December 31, 2023 and 2022.
New Accounting Standards Not Yet Adopted	New Accounting Standards Not Yet Adopted In November 2023, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2023-07, In December 2023, the FASB issued ASU No. 2023-09,

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
Estimated Useful Lives of Property Plant and Equipment	Property, plant and equipment are stated at historical cost. The costs of additions and improvements are capitalized, while maintenance and repairs are expensed as incurred. Cash flows for capital expenditures as reported in cash flows from investing activities in the Consolidated Statements of Cash Flows are adjusted to exclude unpaid amounts accrued at period end. Depreciation is provided using the straight-line method generally over the following estimated useful lives: Buildings 40 years Machinery and equipment 3-11 years Furniture and fixtures 10 years Forklifts and tractors 5 years Computer equipment and software 5 years

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2023
Inventory Disclosure [Abstract]
Summary of Inventories	Inventories at LIFO value consist of the following as of December 31 (in thousands): 2023 2022 Finished goods $ 88,840 $ 107,114 Raw materials 51,688 69,292 Total FIFO inventories 140,528 176,406 Reserve to adjust inventories to LIFO value (33,439 ) (35,051 ) Total LIFO inventories $ 107,089 $ 141,355

Prepaid Expenses and Other As_2

Prepaid Expenses and Other Assets (Tables)	12 Months Ended
	Dec. 31, 2023
Text Block [Abstract]
Summary of Prepaid Expenses and Other Assets	Prepaid expenses and other assets consist of the following as of December 31 (in thousands): 2023 2022 Prepaid expenses $ 11,830 $ 10,787 Income tax receivable 9,611 23,979 Other 629 339 Total prepaid expenses and other assets $ 22,070 $ 35,105

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Summary of Property, Plant and Equipment	Property, plant and equipment consist of the following as of December 31 (in thousands): 2023 2022 Machinery and equipment $ 545,037 $ 529,975 Building and improvements 145,821 120,116 Forklifts and tractors 24,646 24,516 Computer equipment 18,497 16,182 Furniture and fixtures 9,489 6,180 Construction in process 247,659 161,035 Land 29,143 24,886 Total property, plant and equipment 1,020,292 882,890 Accumulated depreciation (310,890 ) (292,998 ) Total property, plant and equipment, net $ 709,402 $ 589,892

Accrued Expenses and Other Li_2

Accrued Expenses and Other Liabilities (Tables)	12 Months Ended
	Dec. 31, 2023
Payables and Accruals [Abstract]
Summary of Accrued Expenses and Other Liabilities	Accrued expenses and other liabilities consist of the following as of December 31 (in thousands): 2023 2022 Sales and marketing $ 15,496 $ 19,194 Compensation and benefits 25,859 8,646 Operatin lease liabilitie 7,663 7,488 Manufacturing costs 3,382 3,425 Other 4,334 5,311 Total accrued expenses and other liabilities $ 56,734 $ 44,064

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2023
Leases [Abstract]
Supplemental Cash Flow information and Supplemental balance sheet information related to operating leases to operating leases	The following table includes supplemental cash flow information for the years ended December 31, 2023, December 31, 2022, and December 31, 2021 and supplemental balance sheet information at December 31, 2023 and December 31, 2022 related to operating leases (in thousands): Supplemental Cash Flow Information For the Year Ended 2023 2022 2021 Cash paid for amounts included in the measurement of operating lease liabilities $ 8,176 $ 8,688 $ 8,280 Operating ROU assets obtained in exchange for lease liabilities $ 2,559 $ 8,064 $ 7,295 Supplemental Balance Sheet Information December 31, 2023 December 31, 2022 Operating lease ROU assets $ 26,233 $ 30,991 Operating lease liabilities: Accrued expenses and other current liabilities $ 7,663 $ 7,488 Operating lease liabilities 18,840 23,974 Total operating lease liabilities $ 26,503 $ 31,462
Maturities of operating lease liabilities	The following table summarizes maturities of operating lease liabilities at December 31, 2023 (in thousands): Maturities of operating lease liabilities 2024 $ 7,763 2025 5,749 2026 4,891 2027 4,486 2028 3,948 Thereafter 933 Total lease payments $ 27,770 Less imputed interest (1,267 ) Total operating liabilities $ 26,503

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2023
Equity [Abstract]
Computation of Basic and Diluted Earnings Per Share	The following table sets forth the computation of basic and diluted earnings per share (in thousands, except share and per share data): Year Ended December 31, 2023 2022 2021 Numerator: Net income $ 205,384 $ 184,626 $ 208,737 Denominator: Basic weighted average shares outstanding 108,680,459 111,710,676 115,461,016 Effect of dilutive securities: Stock appreciation rights 71,406 94,859 180,875 Restricted stock 57,538 74,953 120,952 Diluted weighted average shares outstanding 108,809,403 111,880,488 115,762,843 Basic earnings per share $ 1.89 $ 1.65 $ 1.81 Diluted earnings per share $ 1.89 $ 1.65 $ 1.80
Antidilutive Securities Excluded from Computation of Earnings Per Share	The computation of diluted earnings per share excludes the following potentially dilutive securities because the effect would be anti-dilutive: Year Ended December 31, 2023 2022 2021 Restricted stock 52,323 48,851 6,296 Stock appreciation rights 93,163 52,107 12,602

Revenue From Contracts With C_2

Revenue From Contracts With Customers (Tables)	12 Months Ended
	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Summary of Disaggregated Net Sales	The tables also include a reconciliation of the respective disaggregated net sales with the Company’s reportable segments (in thousands): Year Ended December 31, 2023 Trex Total Timing of Revenue Recognition and Type of Contract Products transferred at a point in time and variable consideration contracts $ 1,094,837 $ 1,094,837 $ 1,094,837 $ 1,094,837 Year Ended December 31, 2022 Reportable Segment Trex Residential Trex Commercial Total Timing of Revenue Recognition and Type of Contract Products transferred at a point in time and variable consideration contracts $ 1,059,536 $ —  $ 1,059,536 Products transferred over time and fixed price contracts —  46,507 46,507 $ 1,059,536 $ 46,507 $ 1,106,043 Year Ended December 31, 2021 Reportable Segment Trex Residential Trex Commercial Total Timing of Revenue Recognition and Type of Contract Products transferred at a point in time and variable consideration contracts $ 1,139,266 $ —  $ 1,139,266 Products transferred over time and fixed price contracts —  57,686 57,686 $ 1,139,266 $ 57,686 $ 1,196,952

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2023
Summary of Stock-Based Compensation Expense	The following table summarizes the Company’s stock-based compensation expense (in thousands): Year Ended December 31, 2023 2022 2021 Time-based restricted stock and restricted stock units $ 3,897 $ 3,783 $ 2,892 Performance-based restricted stock and restricted stock units 4,836 540 4,681 Stock appreciation rights 908 792 485 Employee stock purchase plan 523 214 381 Total stock-based compensation $ 10,164 $ 5,329 $ 8,439
Summary of Assumptions Used to Estimate Fair Value of Each SAR	For SARs issued in the years ended December 31, 2023, December 31, 2022, and December 31, 2021, respectively, the assumptions shown in the following table were used: Year Ended December 31, 2023 2022 2021 Dividend yield 0 % 0 % 0 % Average risk-free interest rate 4.0 % 1.9 % 0.6 % Expected term (years) 5 5 5 Expected volatility 49.5 % 44.9 % 58.7 %
SAR Activity	SAR activity under the Plan and all predecessor stock incentive plans is as follows: SARs Weighted- Grant Price Per Share Weighted- Remaining Contractual Life (Years) Aggregate Intrinsic Value as of December 31, 2021 Outstanding at December 31, 2020 293,276 $ 22.15 Granted 15,029 $ 104.56 Exercised (102,562 ) $ 9.45 Canceled (4,745 ) $ 61.66 Outstanding at December 31, 2021 200,998 $ 33.86 Granted 32,971 $ 82.01 Exercised —  $ —  Canceled —  $ —  Outstanding at December 31, 2022 233,969 $ 40.64 Granted 51,916 $ 56.80 Exercised (53,036 ) $ 11.95 Canceled (12,969 ) $ 75.25 Outstanding at December 31, 2023 219,880 $ 49.34 6.3 $ 6,393,512 Vested at December 31, 2023 150,657 $ 41.54 5.0 $ 6,378,706 Exercisable at December 31, 2023 150,657 $ 41.54 5.0 $ 6,378,706
Time-Based Restricted Stock and Time-Based Restricted Stock Units [Member]
Restricted Stock Activity	Time-based restricted stock and restricted stock unit activity under the Plan and all predecessor stock incentive plans is as follows: Time-based Restricted Stock and Restricted Stock Unit Weighted- Grant Price Per Share Nonvested at December 31, 2020 160,722 $ 35.68 Granted 33,703 $ 100.50 Vested (78,081 ) $ 37.81 Forfeited (4,798 ) $ 66.00 Nonvested at December 31, 2021 111,546 $ 52.91 Granted 57,094 $ 75.06 Vested (56,719 ) $ 58.13 Forfeited (1,286 ) $ 86.84 Nonvested at December 31, 2022 110,635 $ 61.28 Granted 97,177 $ 58.50 Vested (81,080 ) $ 56.52 Forfeited (10,228 ) $ 66.19 Nonvested at December 31, 2023 116,504 $ 65.00
Performance-Based Restricted Stock and Performance-Based Restricted Stock Units [Member]
Restricted Stock Activity	Performance-based restricted stock activity under the Plan is as follows: Performance-based Restricted Stock and Performance-based Restricted Stock Units Weighted- Average Grant Price Per Share Nonvested at December 31, 2020 72,570 $ 43.42 Granted 36,522 $ 86.26 Vested (45,051 ) $ 39.41 Forfeited (6,273 ) $ 65.30 Nonvested at December 31, 2021 57,768 $ 71.21 Granted 72,152 $ 76.14 Vested (57,875 ) $ 64.43 Forfeited (562 ) $ 82.95 Nonvested at December 31, 2022 71,483 $ 81.57 Granted 96,103 $ 56.79 Vested (30,038 ) $ 66.26 Forfeited (28,163 ) $ 74.39 Nonvested at December 31, 2023 109,385 $ 65.92

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Income Tax Provision (Benefit)	Income tax provision (benefit) consists of the following (in thousands): Year Ended December 31, 2023 2022 2021 Current income tax provision: Federal $ 52,634 $ 28,830 $ 30,450 State 13,996 9,126 15,192 66,600 37,956 45,642 Deferred income tax provision: Federal 2,869 20,000 21,607 State 1,346 4,256 (595 ) 4,215 24,256 21,012 Total income tax provision $ 70,815 $ 62,212 $ 66,654
Reconciliation of Differences between Income Tax Provision and Income Tax Determined by Applying US Federal Statutory Rate	The income tax provision differs from the amount of income tax determined by applying the U.S. Federal statutory rate to income before taxes as a result of the following (in thousands): Year Ended December 31, 2023 2022 2021 U.S. Federal statutory taxes $ 58,002 $ 51,836 $ 57,832 State and local taxes, net of U.S. Federal benefit 12,296 10,608 12,174 Permanent items 1,320 (208 ) 1,208 Excess tax benefits from vesting or settlement of stock compensation awards (656 ) (11 ) (2,868 ) Federal credits (755 ) (598 ) (686 ) Other 608 585 (1,006 ) Total income tax provision $ 70,815 $ 62,212 $ 66,654
Schedule of Deferred Tax Assets and Liabilities	Deferred tax assets and liabilities consist of the following (in thousands): As of December 31, 2023 2022 Deferred tax assets: Operating lease liability 6,886 7,941 Product and surface flaking warranty reserves 5,645 6,469 State tax credit carryforwards 4,250 4,084 Deferred revenue 4,215 2,921 Tax Cut and Jobs Act capitalization of research and development costs 3,956 2,152 Stock-based compensation 2,361 1,146 Inventories 639 2,965 Accruals not currently deductible and other —  373 Net Operating Losses —  132 Gross deferred tax assets, before valuation allowance 27,952 28,183 Valuation allowance (3,307 ) (3,026 ) Gross deferred tax assets, after valuation allowance 24,645 25,157 Deferred tax liabilities: Depreciation (74,794 ) (74,604 ) Inventories (10,627 ) (6,749 ) Operating lease right-of-use (6,677 ) (7,687 ) Goodwill amortization (3,536 ) (2,879 ) Other (1,450 ) (1,462 ) Gross deferred tax liabilities (97,084 ) (93,381 ) Net deferred tax liability $ (72,439 ) $ (68,224 )

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2023
Segment Reporting [Abstract]
Details of Segment Information	Segment Data (in thousands): Net Sales Net Income EBITDA Depreciation and Amortization Income Tax Expense / Capital Expenditures Total Assets December 31, 2023 Trex Residential $ 1,094,837 $ 205,384 $ 326,393 $ 50,189 $ 70,815 $ 166,089 $ 932,885 Consolidated $ 1,094,837 $ 205,384 $ 326,393 $ 50,189 $ 70,815 $ 166,089 $ 932,885 December 31, 2022 Trex Residential $ 1,059,536 $ 200,876 $ 311,259 $ 43,173 $ 67,313 $ 175,904 $ 933,705 Trex Commercial 46,507 (16,250 ) (20,226 ) 1,125 (5,101 ) 324 —  Consolidated $ 1,106,043 $ 184,626 $ 291,033 $ 44,298 $ 62,212 $ 176,228 $ 933,705 December 31, 2021 Trex Residential $ 1,139,266 $ 247,059 $ 361,485 $ 34,941 $ 79,500 $ 157,568 $ 881,225 Trex Commercial 57,686 (38,322 ) (50,163 ) 1,005 (12,846 ) 1,826 39,096 Consolidated $ 1,196,952 $ 208,737 $ 311,322 $ 35,946 $ 66,654 $ 159,394 $ 920,321
Schedule of Reconciliation of Net Income to EBITDA	Reconciliation of Net Income (Loss) to EBITDA (in thousands): Net Income / Interest Expense / Income Tax Expense / Depreciation and Amortization EBITDA December 31, 2023 Trex Residential $ 205,384 $ 5 $ 70,815 $ 50,189 $ 326,393 Consolidated $ 205,384 $ 5 $ 70,815 $ 50,189 $ 326,393 December 31, 2022 Trex Residential $ 200,876 $ (103 ) $ 67,313 $ 43,173 $ 311,259 Trex Commercial (16,250 ) —  (5,101 ) 1,125 (20,226 ) Consolidated $ 184,626 $ (103 ) $ 62,212 $ 44,298 $ 291,033 December 31, 2021 Trex Residential $ 247,059 $ (15 ) $ 79,500 $ 34,941 $ 361,485 Trex Commercial (38,322 ) —  (12,846 ) 1,005 (50,163 ) Consolidated $ 208,737 $ (15 ) $ 66,654 $ 35,946 $ 311,322

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Summary of Reconciliation of Company's Residential Product Warranty Reserve	The following is a reconciliation of the Trex Residential product warranty and surface flaking reserves (in thousands): Year Ended December 31, 2023 Product Surface Flaking Total Beginning balance, January 1 $ 9,694 $ 15,905 $ 25,599 Provisions and changes in estimates 7,308 (3,800 ) 3,508 Settlements made during the period (4,936 ) (1,993 ) (6,929 ) Ending balance, December 31 $ 12,066 $ 10,112 $ 22,178 Year Ended December 31, 2022 Product Surface Flaking Total Beginning balance, January 1 $ 10,053 $ 18,542 $ 28,595 Provisions and changes in estimates 1,914 —  1,914 Settlements made during the period (2,273 ) (2,637 ) (4,910 ) Ending balance, December 31 $ 9,694 $ 15,905 $ 25,599

Business and Organization - Add

Business and Organization - Additional Information (Detail) - Segment		12 Months Ended
	Dec. 30, 2022	Dec. 31, 2023
Accounting Policies [Abstract]
Number of reportable segments	2	1

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Detail)		12 Months Ended
	Jan. 01, 2023	Dec. 31, 2023 USD ($) Customer Institution Supplier	Dec. 31, 2022 USD ($) Customer	Dec. 31, 2021 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		3	2
Number of largest raw material suppliers | Supplier		4
Excess of the replacement cost of inventory over the LIFO value of inventory		$ (33,439,000)	$ (35,051,000)
Annual impairment test of goodwill		0	0	$ 54,245,000
Valuation allowance		3,307,000	3,026,000
Research and Development costs		3,300,000	500,000	6,000,000
Prepaid expenses for production costs of advertising		1,800,000	1,600,000
Branding Expenses		$ 48,800	$ 43,300	30,700
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
Fire At Virginia Facility [Member] | Insurance Settlement [Member]
Schedule Of Significant Accounting Policies [Line Items]
Gain loss on insurance settlement		$ 8,700,000
Commercial Portfolio Segment [Member] | Railing [Member]
Schedule Of Significant Accounting Policies [Line Items]
Annual impairment test of goodwill				42,500,000
Commercial Portfolio Segment [Member] | Staging [Member]
Schedule Of Significant Accounting Policies [Line Items]
Annual impairment test of goodwill				$ 11,800,000
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		7 years
Minimum [Member]
Schedule Of Significant Accounting Policies [Line Items]
Operating Lease terms		1 year
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%	10%	10%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Customer One [Member]
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk as percentage of total		72%	64%	61%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer One [Member]
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk as percentage of total		27%	35%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer Two [Member]
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk as percentage of total		23%	26%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer Three [Member]
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk as percentage of total		20%
Raw Materials [Member] | Supplier Concentration Risk [Member] | Four Largest Suppliers [Member]
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk as percentage of total		26.70%	17.50%	26%

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Estimated Useful Lives of Property Plant and Equipment (Detail)	Dec. 31, 2023
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment estimated useful life	40 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment estimated useful life	10 years
Forklifts and Tractors [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment estimated useful life	5 years
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment estimated useful life	5 years
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment estimated useful life	11 years
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment estimated useful life	3 years

Sale of Trex Commercial Produ_2

Sale of Trex Commercial Products, Inc. - Additional Information (Detail) - USD ($) $ in Thousands		12 Months Ended
	Dec. 30, 2022	Dec. 31, 2022
Subsidiary or Equity Method Investee [Line Items]
Proceeds from sale of assets		$ 7,290
Gain (loss) on disposition of stock in subsidiary		$ (15,423)
Trex Commercial Products Inc [Member]
Subsidiary or Equity Method Investee [Line Items]
Proceeds from sale of assets	$ 7,300
Gain (loss) on disposition of stock in subsidiary	$ (15,400)

Inventories - Summary of Invent

Inventories - Summary of Inventories (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Inventory Disclosure [Abstract]
Finished goods	$ 88,840	$ 107,114
Raw materials	51,688	69,292
Total FIFO inventories	140,528	176,406
Reserve to adjust inventories to LIFO value	(33,439)	(35,051)
Total LIFO inventories	$ 107,089	$ 141,355

Prepaid Expenses and Other As_3

Prepaid Expenses and Other Assets - Summary of Prepaid Expenses and Other Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Prepaid Expense and Other Assets [Abstract]
Prepaid expenses	$ 11,830	$ 10,787
Income tax receivable	9,611	23,979
Other	629	339
Total prepaid expenses and other assets	$ 22,070	$ 35,105

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets, Net - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Amortization of intangible asset	$ 400	$ 400	$ 400
Intangible Assets	6,300	6,300
Accumulated Amortization	2,400	1,900
Goodwill, Impairment Loss	0	0	54,245
Commercial [Member] | Railing [Member]
Goodwill [Line Items]
Goodwill, Impairment Loss			42,500
Commercial [Member] | Staging [Member]
Goodwill [Line Items]
Goodwill, Impairment Loss			$ 11,800
Residential [Member]
Goodwill [Line Items]
Goodwill	$ 14,200	$ 14,200
Domain Names [Member]
Goodwill [Line Items]
Amortization period	15 years

Property, Plant and Equipment -

Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 1,020,292	$ 882,890
Accumulated depreciation	(310,890)	(292,998)
Total property, plant and equipment, net	709,402	589,892
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	545,037	529,975
Building and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	145,821	120,116
Forklifts and Tractors [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	24,646	24,516
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	18,497	16,182
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	9,489	6,180
Construction in Process [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	247,659	161,035
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 29,143	$ 24,886

Property, Plant and Equipment_2

Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 1,020,292	$ 882,890
Depreciation expense	49,800	43,900	$ 35,500
Construction in Process [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 247,659	$ 161,035

Accrued Expenses and Other Li_3

Accrued Expenses and Other Liabilities - Summary of Accrued Expenses and Other Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Payables and Accruals [Abstract]
Sales and marketing	$ 15,496	$ 19,194
Compensation and benefits	25,859	8,646
Operating lease liabilities	7,663	7,488
Manufacturing costs	3,382	3,425
Other	4,334	5,311
Total accrued expenses and other liabilities	$ 56,734	$ 44,064
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Total accrued expenses and other liabilities	Total accrued expenses and other liabilities

Debt - Additional Information (

Debt - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 22, 2022	May 18, 2022
Line of Credit Facility [Line Items]
Remaining available borrowing capacity	$ 544,500,000
Outstanding borrowing capacity	$ 5,500,000	$ 222,000,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt, Weighted Average Interest Rate	6.25%
Revolving Credit Facility [Member] | Fifth Amendment And Restated Agreement [Member]
Line of Credit Facility [Line Items]
Revolving loans in a collective maximum principal amount				$ 400,000,000
Termination date of the Credit Agreement	May 18, 2027
Number Of Business Days Within Which Lender May Raise Objections To Amendment	10 days
Revolving Credit Facility [Member] | Fifth Amendment And Restated Agreement [Member] | Letter of Credit [Member]
Line of Credit Facility [Line Items]
Revolving loans in a collective maximum principal amount				60,000,000
Revolving Credit Facility [Member] | Fifth Amendment And Restated Agreement [Member] | Swingline Letter Of Credit [Member]
Line of Credit Facility [Line Items]
Revolving loans in a collective maximum principal amount				$ 20,000,000
Revolving Credit Facility [Member] | Base Rate [Member] | Fifth Amendment And Restated Agreement [Member]
Line of Credit Facility [Line Items]
Interest rate	0.50%
Debt instrument, description of variable rate basis	the Federal Funds Rate plus 0.50%
Revolving Credit Facility [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Fifth Amendment And Restated Agreement [Member]
Line of Credit Facility [Line Items]
Interest rate	1%
Debt instrument, description of variable rate basis	the Term SOFR plus 1.0%
Revolving B Loan [Member]
Line of Credit Facility [Line Items]
Long-Term Line of Credit	$ 150,000,000
Revolving B Loan [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Debt instrument, Interest rate, Stated percentage	2.15%
Revolving B Loan [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Debt instrument, Interest rate, Stated percentage	1.20%
Revolving B Loan [Member] | Fifth Amendment And Restated Agreement [Member] | Letter of Credit [Member]
Line of Credit Facility [Line Items]
Revolving loans in a collective maximum principal amount			$ 60,000,000
Revolving B Loan [Member] | Fifth Amendment And Restated Agreement [Member] | Swingline Letter Of Credit [Member]
Line of Credit Facility [Line Items]
Revolving loans in a collective maximum principal amount			$ 20,000,000
Revolving B Loan [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Interest rate	1.15%
Revolving B Loan [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Interest rate	0.20%

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Weighted average discount rate	2.32%	2.10%
Operating lease cost	$ 8	$ 8.4
Weighted average remaining lease term	4 years 4 months 24 days	5 years 2 months 12 days

Leases - Supplemental Cash flow

Leases - Supplemental Cash flow Information to operating leases (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Supplemental cash flow information
Cash paid for amounts included in the measurement of operating lease liabilities	$ 8,176	$ 8,688	$ 8,280
Operating ROU assets obtained in exchange for lease liabilities	2,559	8,064	$ 7,295
Supplemental balance sheet information
Operating lease ROU assets	26,233	30,991
Operating lease liabilities:
Accrued expenses and other current liabilities	7,663	7,488
Operating lease liabilities	18,840	23,974
Total operating lease liabilities	$ 26,503	$ 31,462

Leases - Maturities of Operatin

Leases - Maturities of Operating Lease Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Operating Lease Liabilities, Payments Due [Abstract]
2024	$ 7,763
2025	5,749
2026	4,891
2027	4,486
2028	3,948
Thereafter	933
Total lease payments	27,770
Less imputed interest	(1,267)
Total operating liabilities	$ 26,503	$ 31,462

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - shares		12 Months Ended
	May 04, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Feb. 16, 2018
Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased by the Company		264,896	6,511,809	809,099
Stock Repurchase Programs [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchased during period, shares		0
2018 Stock Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Common stock repurchase program, authorized shares					11,600,000
2023 Stock Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased by the Company	10,800,000
2023 Stock Repurchase Program [Member] | Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchased during period, shares	264,896

Stockholders' Equity - Computat

Stockholders' Equity - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Numerator:
Net income	$ 205,384	$ 184,626	$ 208,737
Denominator:
Basic weighted average shares outstanding	108,680,459	111,710,676	115,461,016
Effect of dilutive securities:
Diluted weighted average shares outstanding	108,809,403	111,880,488	115,762,843
Basic earnings per share	$ 1.89	$ 1.65	$ 1.81
Diluted earnings per share	$ 1.89	$ 1.65	$ 1.8
Stock appreciation rights [Member]
Effect of dilutive securities:
Dilutive securities	71,406	94,859	180,875
Restricted stock [Member]
Effect of dilutive securities:
Dilutive securities	57,538	74,953	120,952

Stockholders' Equity - Antidilu

Stockholders' Equity - Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) - shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restricted stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the computation of diluted earnings per share	52,323	48,851	6,296
Stock appreciation rights [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the computation of diluted earnings per share	93,163	52,107	12,602

Revenue From Contracts With C_3

Revenue From Contracts With Customers - Summary of Disaggregated Net Sales (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	$ 1,094,837	$ 1,106,043	$ 1,196,952
Products Transferred at a Point in Time and Variable Consideration Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	1,094,837	1,059,536	1,139,266
Products Transferred Over Time and Fixed Price Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers		46,507	57,686
Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	1,094,837	1,059,536	1,139,266
Residential [Member] | Products Transferred at a Point in Time and Variable Consideration Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	$ 1,094,837	1,059,536	1,139,266
Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers		46,507	57,686
Commercial [Member] | Products Transferred Over Time and Fixed Price Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers		$ 46,507	$ 57,686

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Approximate number of shares employees purchased under the Employee Stock Purchase Plan	1,897,771
2014 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total aggregate number of shares of common stock that may be issued	4,000,000
Number of common stock available for future issuance	3,979,521
Performance-Based Restricted Stock and Performance-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost recognition period for unvested awards	1 year
Unrecognized compensation cost related to unvested awards	$ 4.3	$ 0.3	$ 2.8
Vesting period	3 years
Stock Appreciation Rights [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested awards	$ 2.3
Fair value assumptions method used	Black-Scholes option-pricing model
Weighted-average fair value of grants	$ 27.19	$ 33.9	$ 51.84
Time-Based Restricted Stock and Time-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost recognition period for unvested awards	1 year 8 months 12 days
Unrecognized compensation cost related to unvested awards	$ 5
Total fair value of restricted shares vested	$ 4.7	$ 3.7	$ 8.2
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total aggregate number of shares of common stock that may be issued	2,400,000
Percentage of market price on lesser of either first day of calendar quarter or last day of calendar quarter for purchase price	85%
Percentage of gross compensation eligible employees may elect to participate in the plan	15%
Maximum [Member] | Performance-Based Restricted Stock and Performance-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target number of shares that will vest	200%
Minimum [Member] | Performance-Based Restricted Stock and Performance-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target number of shares that will vest	0%

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Stock-Based Compensation Expenses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 10,164	$ 5,329	$ 8,439
Time-Based Restricted Stock and Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	3,897	3,783	2,892
Performance-Based Restricted Stock and Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	4,836	540	4,681
Stock Appreciation Rights [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	908	792	485
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 523	$ 214	$ 381

Stock-Based Compensation - Time

Stock-Based Compensation - Time-Based Restricted Stock and Restricted Stock Unit Activity (Detail) - Time-Based Restricted Stock and Time-Based Restricted Stock Units [Member] - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule Of Restricted Stock Activity [Line Items]
Nonvested, Shares, Beginning Balance	110,635	111,546	160,722
Time-based Restricted Stock, Granted	97,177	57,094	33,703
Time-based Restricted Stock, Vested	(81,080)	(56,719)	(78,081)
Time-based Restricted Stock, Forfeited	(10,228)	(1,286)	(4,798)
Nonvested, Shares, Ending Balance	116,504	110,635	111,546
Nonvested, Weighted-Average Grant Price Per Share, Beginning Balance	$ 61.28	$ 52.91	$ 35.68
Weighted-Average Grant Price Per Share, Granted	58.5	75.06	100.5
Weighted-Average Grant Price Per Share, Vested	56.52	58.13	37.81
Weighted-Average Grant Price Per Share, Forfeited	66.19	86.84	66
Nonvested, Weighted-Average Grant Price Per Share, Ending Balance	$ 65	$ 61.28	$ 52.91

Stock-Based Compensation - Perf

Stock-Based Compensation - Performance-Based Restricted Stock Activity (Detail) - Performance-Based Restricted Stock and Performance-Based Restricted Stock Units [Member] - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule Of Restricted Stock Activity [Line Items]
Nonvested, Shares, Beginning Balance	71,483	57,768	72,570
Performance-based Restricted Stock, Granted	96,103	72,152	36,522
Performance-based Restricted Stock, Vested	(30,038)	(57,875)	(45,051)
Performance-based Restricted Stock, Forfeited	(28,163)	(562)	(6,273)
Nonvested, Shares, Ending Balance	109,385	71,483	57,768
Nonvested, Weighted-Average Grant Price Per Share, Beginning Balance	$ 81.57	$ 71.21	$ 43.42
Weighted-Average Grant Price Per Share, Granted	56.79	76.14	86.26
Weighted-Average Grant Price Per Share, Vested	66.26	64.43	39.41
Weighted-Average Grant Price Per Share, Forfeited	74.39	82.95	65.3
Nonvested, Weighted-Average Grant Price Per Share, Ending Balance	$ 65.92	$ 81.57	$ 71.21

Stock-Based Compensation - Su_2

Stock-Based Compensation - Summary of Assumptions Used to Estimate Fair Value of Each SAR (Detail) - Stock Appreciation Rights [Member]	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share Based Compensation Arrangement by Share Based Payment Award Fair Value Assumptions and Methodology [Line Items]
Dividend yield	0%	0%	0%
Average risk-free interest rate	4%	1.90%	0.60%
Expected term (years)	5 years	5 years	5 years
Expected volatility	49.50%	44.90%	58.70%

Stock-Based Compensation - SAR

Stock-Based Compensation - SAR Activity (Detail) - Stock Appreciation Rights [Member] - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule Of Stock Appreciation Rights Activity [Line Items]
SARs Outstanding, Beginning Balance	233,969	200,998	293,276
Granted, SARs	51,916	32,971	15,029
Exercised, SARs	(53,036)	0	(102,562)
Canceled, SARs	(12,969)	0	(4,745)
Shares Outstanding, SARs, Ending Balance	219,880	233,969	200,998
Vested, SARs	150,657
Exercisable, SARs	150,657
Outstanding, Weighted Average Grant Price Per Share, Beginning Balance	$ 40.64	$ 33.86	$ 22.15
Granted, Weighted Average Grant Price Per Share	56.8	82.01	104.56
Exercised, Weighted Average Grant Price Per Share	11.95	0	9.45
Canceled, Weighted Average Grant Price Per Share	75.25	0	61.66
Outstanding, Weighted Average Grant Price Per Share, Ending Balance	49.34	$ 40.64	$ 33.86
Vested, Weighted Average Grant Price Per Share	41.54
Exercisable, Weighted Average Grant Price Per Share	$ 41.54
Weighted Average Remaining Contractual Life, Outstanding	6 years 3 months 18 days
Weighted Average Remaining Contractual Life, Vested	5 years
Weighted Average Remaining Contractual Life, Exercisable	5 years
Aggregate Intrinsic Value, Outstanding	$ 6,393,512
Aggregate Intrinsic Value, Vested	6,378,706
Aggregate Intrinsic Value, Exercisable	$ 6,378,706

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Employer's contribution	$ 6.8	$ 8.1	$ 6.6

Income Taxes - Income Tax Provi

Income Taxes - Income Tax Provision (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current income tax provision:
Federal	$ 52,634	$ 28,830	$ 30,450
State	13,996	9,126	15,192
Total	66,600	37,956	45,642
Deferred income tax provision:
Federal	2,869	20,000	21,607
State	1,346	4,256	(595)
Total	4,215	24,256	21,012
Total income tax provision	$ 70,815	$ 62,212	$ 66,654

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Differences between Income Tax Provision and Income Tax Determined by Applying US Federal Statutory Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Effective Income Tax Rate Reconciliation, Amount [Abstract]
U.S. Federal statutory taxes	$ 58,002	$ 51,836	$ 57,832
State and local taxes, net of U.S. Federal benefit	12,296	10,608	12,174
Permanent items	1,320	(208)	1,208
Excess tax benefits from vesting or settlement of stock compensation awards	(656)	(11)	(2,868)
Federal credits	(755)	(598)	(686)
Other	608	585	(1,006)
Total income tax provision	$ 70,815	$ 62,212	$ 66,654

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Operating lease liability	$ 6,886	$ 7,941
Product and surface flaking warranty reserves	5,645	6,469
State tax credit carryforwards	4,250	4,084
Deferred revenue	4,215	2,921
Tax Cut and Jobs Act capitalization of research and development costs	3,956	2,152
Stock-based compensation	2,361	1,146
Inventories	639	2,965
Accruals not currently deductible and other	0	373
Net Operating Losses	0	132
Gross deferred tax assets, before valuation allowance	27,952	28,183
Valuation allowance	(3,307)	(3,026)
Gross deferred tax assets, after valuation allowance	24,645	25,157
Deferred tax liabilities:
Depreciation	(74,794)	(74,604)
Inventories	(10,627)	(6,749)
Operating lease right-of-use asset	(6,677)	(7,687)
Goodwill amortization	(3,536)	(2,879)
Other	(1,450)	(1,462)
Gross deferred tax liabilities	(97,084)	(93,381)
Net deferred tax liability	$ (72,439)	$ (68,224)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2023 USD ($) Tax_Positions	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Income Tax Contingency [Line Items]
Valuation allowance	$ 3,307,000	$ 3,026,000
Income tax expense (benefit)	$ 70,815,000	$ 62,212,000	$ 66,654,000
Unrecognized tax benefits number of tax matters | Tax_Positions	0
Unrecognized tax benefits related to identified uncertain tax positions	$ 0
Effective tax rate	25.60%	25.20%
Earliest Tax Year [Member] | Federal Tax Jurisdiction [Member]
Income Tax Contingency [Line Items]
Tax years subject to examination	2019
Latest Tax Year [Member] | Federal Tax Jurisdiction [Member]
Income Tax Contingency [Line Items]
Tax years subject to examination	2023

Segment Information - Additiona

Segment Information - Additional Information (Detail) $ in Thousands		12 Months Ended
	Dec. 30, 2022 Segment	Dec. 31, 2023 USD ($) Retailer Segment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segment | Segment	2	1
Number of national retailers | Retailer		2
Impairment Charge		$ 0	$ 0	$ 54,245
Gain (loss) on disposition of stock in subsidiary			(15,423)
Commercial [Member]
Segment Reporting Information [Line Items]
Gain (loss) on disposition of stock in subsidiary			$ 15,400

Segment Information - Details o

Segment Information - Details of Segment Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Net Sales	$ 1,094,837	$ 1,106,043	$ 1,196,952
Net Income (Loss)	205,384	184,626	208,737
Depreciation and Amortization	50,189	44,298	35,946
Income Tax Expense /(Benefit)	70,815	62,212	66,654
Total Assets	932,885	933,705
Residential [Member]
Segment Reporting Information [Line Items]
Net Sales	1,094,837	1,059,536	1,139,266
Commercial [Member]
Segment Reporting Information [Line Items]
Net Sales		46,507	57,686
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	1,094,837	1,106,043	1,196,952
Net Income (Loss)	205,384	184,626	208,737
EBITDA	326,393	291,033	311,322
Depreciation and Amortization	50,189	44,298	35,946
Income Tax Expense /(Benefit)	70,815	62,212	66,654
Capital Expenditures	166,089	176,228	159,394
Total Assets	932,885	933,705	920,321
Operating Segments [Member] | Residential [Member]
Segment Reporting Information [Line Items]
Net Sales	1,094,837	1,059,536	1,139,266
Net Income (Loss)	205,384	200,876	247,059
EBITDA	326,393	311,259	361,485
Depreciation and Amortization	50,189	43,173	34,941
Income Tax Expense /(Benefit)	70,815	67,313	79,500
Capital Expenditures	166,089	175,904	157,568
Total Assets	$ 932,885	933,705	881,225
Operating Segments [Member] | Commercial [Member]
Segment Reporting Information [Line Items]
Net Sales		46,507	57,686
Net Income (Loss)		(16,250)	(38,322)
EBITDA		(20,226)	(50,163)
Depreciation and Amortization		1,125	1,005
Income Tax Expense /(Benefit)		(5,101)	(12,846)
Capital Expenditures		324	1,826
Total Assets		$ 0	$ 39,096

Segment Information - Schedule

Segment Information - Schedule of Reconciliation of Net Income (Loss) to EBITDA (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Net Income/ (loss)	$ 205,384	$ 184,626	$ 208,737
Interest (Income), Net	(5)	103	15
Income Tax Expense /(Benefit)	70,815	62,212	66,654
Depreciation and Amortization	50,189	44,298	35,946
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Income/ (loss)	205,384	184,626	208,737
Interest (Income), Net	5	(103)	(15)
Income Tax Expense /(Benefit)	70,815	62,212	66,654
Depreciation and Amortization	50,189	44,298	35,946
EBITDA	326,393	291,033	311,322
Operating Segments [Member] | Residential [Member]
Segment Reporting Information [Line Items]
Net Income/ (loss)	205,384	200,876	247,059
Interest (Income), Net	5	(103)	(15)
Income Tax Expense /(Benefit)	70,815	67,313	79,500
Depreciation and Amortization	50,189	43,173	34,941
EBITDA	$ 326,393	311,259	361,485
Operating Segments [Member] | Commercial [Member]
Segment Reporting Information [Line Items]
Net Income/ (loss)		(16,250)	(38,322)
Income Tax Expense /(Benefit)		(5,101)	(12,846)
Depreciation and Amortization		1,125	1,005
EBITDA		$ (20,226)	$ (50,163)

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) $ in Millions		3 Months Ended	12 Months Ended
	Jan. 01, 2023	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Oct. 26, 2021 USD ($) a
Schedule Of Commitments And Contingencies [Line Items]
Change in warranty reserve for disclosure purposes only			$ 1
Area of Land | a				300
Warranty reserve increase (decrease)		$ 3.8
Residential Portfolio Segment [Member]
Schedule Of Commitments And Contingencies [Line Items]
Land and Land Improvements				$ 450
Surface Flaking Warranty Reserve [Member]
Schedule Of Commitments And Contingencies [Line Items]
Percentage change in warranty claims used as a threshold for disclosure			10%
Residential Use [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period	25 years
Residential Use [Member] | Products Sold Prior to January One, Two Thousand and Twenty Three [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period			25 years
Commercial Use [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period	10 years		10 years
Commercial Use [Member] | Products Sold Prior to January One, Two Thousand and Twenty Three [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period			10 years
Signature Railing And Transcend Cladding [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period	25 years
Signature Railing And Transcend Cladding [Member] | Commercial Use [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period			25 years
Transcend Decking [Member] | Residential Use [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period	50 years
Transcend Decking [Member] | Residential Use [Member] | Products Sold on or After January One, Two Thousand and Twenty Three [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period			50 years
Select Decking And Universal Fascia [Member] | Residential Use [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period	35 years
Select Decking And Universal Fascia [Member] | Residential Use [Member] | Products Sold on or After January One, Two Thousand and Twenty Three [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period			35 years
Enhance Decking And Transcend, Select, Enhance And Signature Railing [Member] | Residential Use [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period	25 years
Enhance Decking And Transcend, Select, Enhance And Signature Railing [Member] | Residential Use [Member] | Products Sold on or After January One, Two Thousand and Twenty Three [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period			25 years
Signature Railing [Member] | Residential Use [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period	25 years
Signature Railing [Member] | Residential and Commercial Use [Member] | Products Sold Prior to January One, Two Thousand and Twenty Three [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period			25 years
Raw Material Supply Contracts [Member]
Schedule Of Commitments And Contingencies [Line Items]
Purchase commitment, due in second year			$ 42.6
Purchase commitment, due in third year			60
Purchase commitment, due in fourth year			$ 60

Commitments and Contingencies_2

Commitments and Contingencies - Summary of Reconciliation of Company's Residential Product Warranty Reserve (Detail) - Surface Flaking Warranty Reserve [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Product Warranty Liability [Line Items]
Beginning balance	$ 25,599	$ 28,595
Provisions and changes in estimates	3,508	1,914
Settlements made during the period	(6,929)	(4,910)
Ending balance	22,178	25,599
Surface Flaking [Member]
Product Warranty Liability [Line Items]
Beginning balance	9,694	10,053
Provisions and changes in estimates	7,308	1,914
Settlements made during the period	(4,936)	(2,273)
Ending balance	12,066	9,694
Other Residential [Member]
Product Warranty Liability [Line Items]
Beginning balance	15,905	18,542
Provisions and changes in estimates	(3,800)	0
Settlements made during the period	(1,993)	(2,637)
Ending balance	$ 10,112	$ 15,905

Schedule II - Valuation and Q_2

Schedule II - Valuation and Qualifying Accounts and Reserves (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Warranty Reserve [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 25,599	$ 28,595	$ 29,473
Additions Charged to Cost and Expenses	3,508	1,914	3,846
Deductions	(6,929)	(4,910)	(4,724)
Balance at End of Period	22,178	25,599	28,595
Valuation Allowance of Deferred Tax Assets [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	3,026	2,232	2,775
Additions Charged to Cost and Expenses	281	794	0
Deductions		0	(543)
Balance at End of Period	$ 3,307	$ 3,026	$ 2,232