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Segment Information | 9 Months Ended
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Sep. 30, 2025
Segment Reporting [Abstract] |
Segment Information | 16. SEGMENT INFORMATION The Company operates in one reportable segment, with resource allocation and assessment of financial performance based on a consolidated basis. Trex manufactures composite decking and railing and related outdoor living products marketed under the brand name Trex®. The products are sold to its distributors and two national retailers who, in turn, sell primarily to the residential market, which includes replacement, remodeling and new construction. The Company’s reportable segments are determined in accordance with its internal management structure, which is based on operations. The Company has identified its President and Chief Executive Officer as the Chief Operating Decision Maker (CODM). The Company’s CODM has final authority over resource allocation decisions and performance assessments and makes key operating decisions. The primary objective of the CODM is to optimize positive Company-wide performance and financial results. The CODM evaluates segment performance primarily based on net income and net sales. The CODM uses net income to assess performance and allocate resources as this measure provides insight into all aspects of the segment’s operations and overall success of the segment for a given period. The CODM also 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. In addition, the CODM reviews significant segment expenses with a primary focus on cost of sales and total selling, general, and administrative expenses. These measures are provided in the accompanying Condensed Consolidated Statements of Comprehensive Income. Segment assets are reported on the Condensed Consolidated Balance Sheets.

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- Definition The entire disclosure for reporting segments including data and tables. 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