Trex (TREX) 10-K 28 Feb 22 2021 FY Annual report Financial data

Cover Page

Cover Page - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2021	Feb. 04, 2022	Jun. 30, 2021
Cover [Abstract]
Amendment Flag	false
Document Fiscal Year Focus	2021
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, 2021
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		114,606,684
Entity File Number	001-14649
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	54-1910453
Entity Address, Address Line One	160 Exeter Drive
Entity Address, City or Town	Winchester,
Entity Address, Postal Zip Code	22603-8605
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			$ 11.7
ICFR Auditor Attestation Flag	true
Auditor Name	Ernst & Young LLP
Auditor Firm ID	42
Auditor Location	Richmond, Virginia

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Net sales	$ 1,196,952	$ 880,831	$ 745,347
Cost of sales	736,448	521,374	438,844
Gross profit	460,504	359,457	306,503
Selling, general and administrative expenses	139,624	125,822	118,304
Goodwill impairment losses	54,245	0	0
Gain on insurance proceeds	8,741
Income from operations	275,376	233,635	188,199
Interest income, net	15	999	1,503
Income before income taxes	275,391	234,634	189,702
Provision for income taxes	66,654	59,003	44,964
Net income	$ 208,737	$ 175,631	$ 144,738
Basic earnings per common share	$ 1.81	$ 1.52	$ 1.24
Basic weighted average common shares outstanding	115,461,016	115,888,859	116,861,194
Diluted earnings per common share	$ 1.80	$ 1.51	$ 1.24
Diluted weighted average common shares outstanding	115,762,843	116,252,866	117,315,498
Comprehensive income	$ 208,737	$ 175,631	$ 144,738

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 141,053	$ 121,701
Accounts receivable, net	151,096	106,748
Inventories	83,753	68,238
Prepaid expenses and other assets	25,152	25,310
Total current assets	401,054	321,997
Property, plant and equipment, net	460,365	336,537
Goodwill and other intangible assets, net	19,001	73,665
Operating lease assets	34,571	34,382
Other assets	5,330	3,911
Total Assets	920,321	770,492
Current Liabilities:
Accounts payable	24,861	38,622
Accrued expenses and other liabilities	58,041	62,331
Accrued warranty	5,800	5,400
Total current liabilities	88,702	106,353
Operating lease liabilities	28,263	28,579
Non-current accrued warranty	22,795	24,073
Deferred income taxes	43,967	22,956
Other long-term liabilities	11,560	0
Total Liabilities	195,287	181,961
Commitments and contingencies
Stockholders' Equity:
Preferred stock, $0.01 par value, 3,000,000 shares authorized; none issued and outstanding
Common stock, $0.01 par value, 180,000,000 shares authorized; 140,734,753 and 140,577,005 shares issued and 115,148,152 and 115,799,503 shares outstanding at December 31, 2021 and 2020, respectively	1,407	1,406
Additional paid-in capital	127,787	126,087
Retained earnings	946,048	737,311
Treasury stock, at cost, 25,586,601 and 24,777,502 shares at December 31, 2021 and 2020, respectively	(350,208)	(276,273)
Total Stockholders' Equity	725,034	588,531
Total Liabilities and Stockholders' Equity	$ 920,321	$ 770,492

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2021	Dec. 31, 2020
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	180,000,000	180,000,000
Common stock, shares issued	140,734,753	140,577,005
Common stock, shares outstanding	115,148,152	115,799,503
Treasury stock, shares	25,586,601	24,777,502

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, 2018	$ 342,963	$ 1,400	$ 123,524	$ 416,942	$ (198,903)
Beginning Balance, Shares at Dec. 31, 2018		117,103,306			22,893,366
Net income	144,738			144,738
Employee stock plans	1,089	$ 2	1,087
Employee stock plans, Shares		154,282
Shares withheld for taxes on awards	(8,245)		(8,245)
Shares withheld for taxes on awards, Shares		(216,756)
Stock-based compensation	6,930	$ 2	6,928
Stock-based compensation, Shares		440,728
Repurchases of common stock	(38,300)				$ (38,300)
Repurchases of common stock, Shares		(1,000,118)			1,000,118
Ending Balance at Dec. 31, 2019	449,175	$ 1,404	123,294	561,680	$ (237,203)
Ending Balance, Shares at Dec. 31, 2019		116,481,442			23,893,484
Net income	175,631			175,631
Employee stock plans	1,446	$ 0	1,446
Employee stock plans, Shares		68,061
Shares withheld for taxes on awards	(5,784)		(5,784)
Shares withheld for taxes on awards, Shares		(111,433)
Stock-based compensation	7,133	$ 2	7,131
Stock-based compensation, Shares		245,451
Repurchases of common stock	(39,070)				$ (39,070)
Repurchases of common stock, Shares		(884,018)			884,018
Ending Balance at Dec. 31, 2020	588,531	$ 1,406	126,087	737,311	$ (276,273)
Ending 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

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Activities
Net income	$ 208,737	$ 175,631	$ 144,738
Adjustments to reconcile net income to net cash provided by operating activities:
Goodwill impairment losses	54,245	0	0
Depreciation and amortization	35,946	17,939	14,031
Deferred income taxes	21,012	13,125	7,706
Stock-based compensation	8,438	7,131	6,930
(Gain) loss on disposal of property, plant and equipment	(45)	(56)	285
Other non-cash adjustments	40	51	(218)
Changes in operating assets and liabilities:
Accounts receivable	(44,349)	(28,286)	12,701
Inventories	(15,515)	(12,132)	1,695
Prepaid expenses and other assets	(8,715)	(358)	(1,652)
Accounts payable	(3,473)	11,353	(16,666)
Accrued expenses and other liabilities	(5,285)	7,655	(10,823)
Income taxes receivable/payable	7,028	(4,759)	(2,375)
Net cash provided by operating activities	258,064	187,294	156,352
Investing Activities
Expenditures for property, plant and equipment and intangibles	(159,394)	(172,823)	(67,265)
Proceeds from sales of property, plant and equipment	1,355	2,165	21
Net cash used in investing activities	(158,039)	(170,658)	(67,244)
Financing Activities
Borrowings under line of credit	494,500	276,000	89,500
Principal payments under line of credit	(494,500)	(276,000)	(89,500)
Repurchases of common stock	(82,473)	(44,854)	(46,545)
Proceeds from employee stock purchase and option plans	1,800	1,446	1,089
Financing costs		(360)	(518)
Net cash used in financing activities	(80,673)	(43,768)	(45,974)
Net increase (decrease) in cash and cash equivalents	19,352	(27,132)	43,134
Cash and cash equivalents at beginning of year	121,701	148,833	105,699
Cash and cash equivalents at end of year	141,053	121,701	148,833
Supplemental disclosures of cash flow information:
Cash paid for interest, net of capitalized interest	0	0	0
Cash paid for income taxes, net	$ 38,614	$ 50,744	$ 39,612

Business and Organization

Business and Organization	12 Months Ended
	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business and Organization	1. BUSINESS AND ORGANIZATION Trex Company, Inc. (together with its wholly-owned subsidiary, the Company), a Delaware corporation, was incorporated on September 4, 1998. The Company operates in two reportable segments, Trex Residential Products (Trex Residential) and Trex Commercial Products (Trex Commercial). 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, 2021
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 and its wholly-owned subsidiary, Trex Commercial Products, Inc. Intercompany accounts and transactions have been eliminated in consolidation. The COVID-19 COVID-19 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, 2021, 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 and for satisfied performance obligations for Trex Commercial 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, 2021 and December 31, 2020. In the years ended December 31, 2021, 2020, and 2019 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, 2021, three customers of Trex Residential represented approximately 61% of the Company’s total net sales. For the year ended December 31, 2020, three customers of Trex Residential represented approximately 56% of the Company’s total net sales. For the year ended December 31, 2019, three customers of Trex Residential represented approximately 57% of the Company’s total net sales. At December 31, 2021 two customers represented 29% and 25%, respectively, of the Company’s total accounts receivable balance. At December 31, 2020 two customers represented 27% and 15%, respectively, of the Company’s accounts receivable balance. For each year ended December 31, 2021, 2020, and 2019, approximately 26%, 28%, and 27%, respectively, of the Company’s materials purchases at Trex Residential were purchased from its four largest suppliers. Inventories Inventories for the Company’s composite decking and railing products at Trex Residential are valued at the lower of cost (last-in, first-out, A majority of the Company’s products at Trex Residential are made in a proprietary process that combines reclaimed wood fibers and scrap polyethylene. The Company 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. Inventories for the Company’s railing and staging products at Trex Commercial for the commercial and multi-family market are valued at the lower of cost (first-in, first-out Work-in 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. Unpaid liabilities related to property, plant and equipment are included in accounts payable and were $2.6 million and $12.9 million at December 31, 2021 and December 31, 2020, respectively. 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 equipment 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 the estimated useful life of the asset. 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 and certain 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 hierarchy: • 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. The Company has determined that it has 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. 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 2021, 2020 and 2019, the Company completed its annual impairment test of goodwill for its 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 years 2020 and 2019, the Company completed its annual impairment test of goodwill for its commercial railing reporting unit and its staging reporting unit utilizing the qualitative assessment and concluded that it was not more likely than not that the fair value of the respective reporting unit was less than its carrying amount. For fiscal year 2021, the Company determined that it was necessary to perform the goodwill impairment test for its 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 delay in new projects due to lingering uncertainty created in the commercial railing and staging markets by the COVID-19 virus. The delay in new projects, coupled with the Company’s successful fulfillment of its pre-pandemic projects, resulted in lower project backlog and reduced forecasted net sales and EBITDA, which became apparent in the fourth quarter of 2021. As a result, the Company recognized an impairment charge at its commercial railing reporting unit and at its staging reporting unit tax-deductible Goodwill and Other Intangible Assets, Net 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 its Trex Residential decking products will be free from material defects in workmanship and materials. This warranty generally extends for a period of 25 years for residential use and 10 years for commercial use. With respect to Trex Signature ® ® ® ® one claims. Reserve estimates are based on management’s judgment, considering such factors as cost per claim, historical experience, anticipated rates of claims, and other available information. Management reviews and adjusts these estimates, if necessary, based on the differences between actual experience and historical estimates.​​​​​​​ 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 satisfies its performance obligation over time as work progresses because control is transferred continuously to its customers. Revenue and estimated profit are 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 include all direct material, labor, subcontract and certain indirect costs. The Company reviews and updates its estimates regularly and recognizes 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, 2021, the Company has a valuation allowance of $2.2 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, 2021, 2020, and 2019, research and development costs were $6.0 million, $3.4 million, and $4.5 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, 2021 and December 31, 2020, $3.1 million and $0.01 million was included in prepaid expenses for production costs, respectively. For the years ended December 31, 2021, 2020, and 2019, branding expenses, including advertising expenses as described above, were $30.7 million, $31.7 million, and $35.7 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, 2021 and 2020. Recently Adopted Accounting Standards In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes in tax laws or rates and clarifies the accounting for transactions that result in a step-up New Accounting Standards Not Yet Adopted In March 2020, the FASB issued ASU No. 2020-01, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting In November 2021, the FASB issued ASU No. 2021-10, Government Assistance (Topic 832): Disclosures by Business Entities about Government Assistance 958-605.

Inventories

Inventories	12 Months Ended
	Dec. 31, 2021
Inventory Disclosure [Abstract]
Inventories	3. INVENTORIES Inventories at LIFO value consist of the following as of December 31 (in thousands): 2021 2020 Finished goods $ 58,401 $ 39,048 Raw materials 56,441 44,475 Total FIFO inventories 114,842 83,523 Reserve to adjust inventories to LIFO value (36,467 ) (16,821 ) Total LIFO inventories $ 78,375 $ 66,702 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. There was no inventory reduction during 2021 or 2020. Inventories valued at lower of cost (FIFO method) and net realizable value as of December 31, 2021 and December 31, 2020, were $5.4 million and $1.5 million, respectively, consisting primarily of raw materials. The Company utilizes the FIFO method of accounting related to its Trex Commercial products.

Prepaid Expenses and Other Asse

Prepaid Expenses and Other Assets	12 Months Ended
	Dec. 31, 2021
Text Block [Abstract]
Prepaid Expenses and Other Assets	4. PREPAID EXPENSES AND OTHER ASSETS Prepaid expenses and other assets consist of the following as of December 31 (in thousands): 2021 2020 Prepaid expenses $ 15,061 $ 7,285 Revenues in excess of billings 9,109 8,879 Income tax receivable 406 7,823 Other 576 1,323 Total prepaid expenses and other assets $ 25,152 $ 25,310

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets, Net	12 Months Ended
	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets, Net	5. GOODWILL AND OTHER INTANGIBLE ASSETS, NET The carrying amount of goodwill by reportable segment at December 31, 2021 and 2020 was as follows (in thousands): Trex Residential Trex Commercial Segment Trex Residential Railing Reporting Staging Balance, December 31, 2020 $ 14,216 $ 42,491 $ 11,754 $ 68,461 Impairment Charge — 42,491 11,754 54,245 Balance, December 31, 2021 $ 14,216 $ — $ — $ 14,216 For fiscal years 2021, 2020 and 2019, 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 years 2020 and 2019, the Company completed its annual impairment test of goodwill for its commercial railing reporting unit and its staging reporting unit in Trex Commercial utilizing the qualitative assessment and concluded that it was not more likely than not that the fair value of the respective 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 delay in new projects due to lingering uncertainty created in the commercial railing and staging markets by the COVID-19 virus. The delay in new projects, coupled with the Company’s successful fulfillment of its pre-pandemic projects, resulted in lower project backlog and reduced forecasted net sales and EBITDA, which became apparent in the fourth quarter of 2021. In performing the quantitative assessment, the Company employed a combination of the Income Approach (i.e., Discounted Cash Flow Method) and the Market Approach. The Discounted Cash Flow Method is a multiple period discounting model in which the fair values of the reporting units are determined by discounting the projected free cash flows using an appropriate discount 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 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 consist of domain names purchased in May 2018. At December 31, 2021 and 2020, intangible assets were $6.3 million, and accumulated amortization was $1.5 million and $1.1 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 years ended December 31, 2021, December 31, 2020, and December 31, 2019, 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, 2021
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	6. PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment consist of the following as of December 31 (in thousands): 2021 2020 Machinery and equipment $ 471,667 $ 312,870 Building and improvements 101,609 61,860 Forklifts and tractors 18,584 16,003 Computer equipment 15,022 11,948 Furniture and fixtures 2,283 1,534 Construction in process 87,700 157,465 Land 22,911 11,351 Total property, plant and equipment 719,776 573,031 Accumulated depreciation (259,411 ) (236,494 ) Total property, plant and equipment, net $ 460,365 $ 336,537 The Company had construction in process as of December 31, 2021 of approximately $87.7 million. The Company expects that substantially all of the above noted construction in process will be completed and put into service in the year ending December 31, 2022. Depreciation expense for the years ended December 31, 2021, 2020, and 2019, totaled $35.5 million, $17.5 million, and $13.6 million, respectively.

Accrued Expenses and Other Liab

Accrued Expenses and Other Liabilities	12 Months Ended
	Dec. 31, 2021
Payables and Accruals [Abstract]
Accrued Expenses and Other Liabilities	7. ACCRUED EXPENSES AND OTHER LIABILITIES Accrued expenses and other liabilities consist of the following as of December 31 (in thousands): 2021 2020 Sales and marketing $ 16,439 $ 22,938 Compensation and benefits 25,450 21,156 Operating 7,066 6,708 Manufacturing costs 4,110 3,641 Billings in excess of revenues 1,401 1,244 Customer deposits 35 1,174 Other 3,540 5,470 Total accrued expenses and other liabilities $ 58,041 $ 62,331

Debt

Debt	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Debt	8. DEBT The Company’s debt consists of a revolving credit facility. At December 31, 2021 and 2020, the Company had no outstanding indebtedness. Available borrowing capacity at December 31, 2021, was $300 million. Revolving Credit Facility On November 5, 2019, the Company entered into a Fourth Amended and Restated Credit Agreement (Fourth Amended Credit Agreement) as borrower, Trex Commercial Products, Inc., as guarantor; Bank of America, N.A. as a Lender, Administrative Agent, Swing Line Lender and L/C Issuer; and certain other lenders including Wells Fargo Bank, N.A., who is also Syndication Agent, and Truist Bank, arranged by BOA Securities, Inc., as Sole Lead Arranger and Sole Bookrunner, to amend and restate the Third Amended and Restated Credit Agreement (Third Amended Credit Agreement), dated as of January 12, 2016, as amended. The Fourth Amended Credit Agreement provides the Company with one or more Revolving Loans in a collective maximum principal amount of $250 million from January 1 through June 30 of each year and a maximum principal amount of $200 million from July 1 through December 31 of each year throughout the term, which ends November 5, 2024. On May 26, 2020, the Company entered into a First Amendment to the Original Credit Agreement (the First Amendment) to provide for an additional $100 million line of credit through May 26, 2022. As a matter of convenience, the parties incorporated the amendments to the Original Credit Agreement made by the First Amendment into a new Fourth Amended and Restated Credit Agreement (New Credit Agreement). In the New Credit Agreement, the revolving commitments under the Original Credit Agreement are referred to as Revolving A Commitments and the new $100 million line of credit is referred to as Revolving B Commitments. In the New Credit Agreement, all of the material terms and conditions related to the original line of credit (Revolving A Commitments) remain unchanged from the Original Credit Agreement. The Company entered into the First Amendment, as borrower; Trex Commercial Products, Inc. (TCP), as guarantor; Bank of America, N.A. (BOA), as a Lender, Administrative Agent, Swing Line Lender and L/C Issuer; and certain other lenders including Wells Fargo Bank, N.A. (Wells Fargo), who is also Syndication Agent; Truist Bank (Truist); and Regions Bank (Regions) (each, a Lender and collectively, the Lenders), arranged by BofA Securities, Inc. as Sole Lead Arranger and Sole Bookrunner. The First Amendment further provides that the New Credit Agreement is amended and restated by changing Schedule 2.01 to add applicable Lender percentages related to the Revolving B Commitment for BOA of 47.5%, Wells Fargo of 28.0% and Regions of 24.5%. The Notes and interest rates for the Revolving A Commitments remained unchanged and are the same as previously disclosed. The Notes for Revolving A Commitments and Revolving B Commitments provide the Company, in the aggregate, the ability to borrow an amount up to the respective Revolving A Loan Limit and Revolving B Loan Limit during the respective Revolving A Term and Revolving B Term. The Company is not obligated to borrow any amount under either the Revolving A Loan or the Revolving B Loan. Within either the Revolving A Loan or the Revolving B Loan, the Company may borrow, repay and reborrow at any time or from time to time while the respective Revolving A Loan or Revolving B Loan remains in effect. Base Rate Loans (as defined in the Fourth Amended 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 Fourth Amended Credit Agreement) and Eurodollar Rate Loans for the Revolving Loans and Swing Line Loans accrue interest at the Adjusted London InterBank Offered Rate plus the Applicable Rate (as defined in the Fourth Amended 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 Eurodollar Rate plus 1.0%. The Applicable Rate for Revolving B Commitments means the following percentages per annum, based upon the Consolidated Debt to Consolidated EBITDA Ratio as set forth in the most recent Compliance Certificate received by BOA as the Administrative Agent and as set forth in the New Credit Agreement: Pricing Tier Consolidated Debt to EBITDA Ratio Eurodollar Rate Base Rate Loans Revolving B 1 > 2.50:1.00 2.75 % 1.75 % 0.60 % 2 < 2.50:1.00 but > 2.00:1.00 2.50 % 1.50 % 0.55 % 3 < 2.00:1.00 but > 1.50:1.00 2.25 % 1.25 % 0.50 % 4 < 1.50:1.00 1.80 % 0.80 % 0.45 % Compliance with Debt Covenants and Restrictions Pursuant to the terms of the Fourth Amended Credit Agreement, the Company is subject to certain loan compliance covenants. The Company was in compliance with all covenants as of December 31, 2021. 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, 2021
Leases [Abstract]
Leases	9. LEASES For the years ended December 31, 2021 and December 31, 2020, total operating lease cost was $8.1 million and $8.5 million, respectively. The weighted average remaining lease term at December 31, 2021 and December 31, 2020 was 5.8 years and 5.6 years, respectively. The weighted average discount rate at December 31, 2021 and December 31, 2020 was 2.47% and 3.47%, respectively. The following table includes supplemental cash flow information for the years ended December 31, 2021 and December 31, 2020 and December 31, 2019 and supplemental balance sheet information at December 31, 2021 and December 31, 2020 related to operating leases (in thousands): Supplemental Cash Flow Information For the Year Ended 2021 2020 2019 Cash paid for amounts included in the measurement of operating lease liabilities $ 8,280 $ 8,736 $ 8,479 Operating ROU assets obtained in exchange for lease liabilities $ 7,295 $ 1,427 $ 1,319 Supplemental Balance Sheet Information December 31, December 31, Operating lease ROU assets $ 34,571 $ 34,382 Operating lease liabilities: Accrued expenses and other current liabilities $ 7,066 $ 6,708 Operating lease liabilities 28,263 28,579 Total operating lease liabilities $ 35,329 $ 35,287 The following table summarizes maturities of operating lease liabilities at December 31, 2021 (in thousands): Maturities of operating lease liabilities 2022 $ 7,859 2023 6,884 2024 6,526 2025 4,574 2026 3,920 Thereafter 8,158 Total lease payments 37,921 Less imputed interest (2,592 ) Total operating liabilities $ 35,329

Financial Instruments

Financial Instruments	12 Months Ended
	Dec. 31, 2021
Investments, All Other Investments [Abstract]
Financial Instruments	10. 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, 2021 and 2020.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Stockholders' Equity	11. 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, 2021 2020 2019 Numerator: Net income $ 208,737 $ 175,631 $ 144,738 Denominator: Basic weighted average shares outstanding 115,461,016 115,888,859 116,861,194 Effect of dilutive securities: Stock appreciation rights 180,875 192,579 248,850 Restricted stock 120,952 171,428 205,454 Diluted weighted average shares outstanding 115,762,843 116,252,866 117,315,498 Basic earnings per share $ 1.81 $ 1.52 $ 1.24 Diluted earnings per share $ 1.80 $ 1.51 $ 1.24 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, 2021 2020 2019 Restricted stock 6,296 — — Stock appreciation rights 12,602 14,697 41,540 Stock Repurchase Program On February 16, 2018, the Board of Directors adopted a stock repurchase program of up to 11.6 million shares of the Company’s outstanding common stock (Stock Repurchase Program). As of December 31, 2021, the Company has repurchased 3.6 million shares of the Company’s outstanding common stock under the Stock Repurchase Program. Stock Split On July 29, 2020, the Company’s Board of Directors approved a two-for-one

Revenue From Contracts With Cus

Revenue From Contracts With Customers	12 Months Ended
	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Revenue From Contracts With Customers	12. 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 Trex Commercial generates revenue from the manufacture and sale of its modular and architectural railing and staging systems. All of its revenues are from fixed-price contracts with customers. Trex Commercial contracts have a single performance obligation as the promise to transfer the individual goods or services is not separately identifiable from other promises in the contract and is, therefore, not distinct. Trex Commercial satisfies its performance obligation over time as work progresses because control is transferred continuously to its customers. Revenue and estimated profit is 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 include all direct material, labor, subcontract and certain indirect costs. The Company reviews and updates its estimates regularly and recognizes adjustments in estimated profit on contracts under the cumulative catch-up The Company recognizes an account receivable for satisfied performance obligations as it has an unconditional right to consideration and payment from the customer is due based solely on the passage of time. The Company receives payments from its customers on the accounts receivable based on the payment terms applicable to each individual contract and the customer pays in less than one year. Accounts receivables are included in “Accounts receivable, net” in the Consolidated Balance Sheets. In addition, the timing of revenue recognition, billings and cash collections may result 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 are reported on a contract-by-contract Trex Commercial pays sales commissions that are directly attributable to identifiable contracts to certain of its employees. If the amortization period of the commission is one year or less, then the Company recognizes the commission expense as incurred. Otherwise, the Company capitalizes the commission and amortizes it on a straight-line basis over the life of the contract. Trex Commercial does 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 are included in net sales and the related costs are included in cost of sales. For each year in the three years ended December 31, 2021, net sales were 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, 2021 Reportable Segment Trex Trex 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 Year Ended December 31, 2020 Reportable Segment Trex Trex Total Timing of Revenue Recognition and Type of Contract Products transferred at a point in time and variable consideration contracts $ 827,792 $ — $ 827,792 Products transferred over time and fixed price contracts — 53,039 53,039 $ 827,792 $ 53,039 $ 880,831 Year Ended December 31, 2019 Reportable Segment Trex Trex Total Timing of Revenue Recognition and Type of Contract Products transferred at a point in time and variable consideration contracts $ 694,267 $ — $ 694,267 Products transferred over time and fixed price contracts — 51,080 51,080 $ 694,267 $ 51,080 $ 745,347

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2021
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	13. STOCK-BASED COMPENSATION On April 30, 2014, the Company’s stockholders approved the Trex Company, Inc. 2014 Stock Incentive Plan (Plan), which was previously approved by the Board of Directors on February 19, 2014. The Plan amended and restated in its entirety the Trex Company, Inc. 2005 Stock Incentive Plan, as previously disclosed. The Plan is administered by the Compensation Committee of the Company’s Board of Directors. Stock-based compensation is granted to officers, directors and certain key employees in accordance with the provisions of the Plan. The Plan provides for grants of stock options, restricted stock, restricted stock units, stock appreciation rights (SARs), and unrestricted stock. The total aggregate number of shares of the Company’s common stock that may be issued under the Plan is 25,680,000 and as of December 31, 2021, the total number of shares available for future issuance was 11,116,654. 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, 2021 2020 2019 Time-based restricted stock and restricted stock units $ 2,892 $ 3,219 $ 3,676 Performance-based restricted stock and restricted stock units 4,681 2,881 2,399 Stock appreciation rights 485 648 662 Employee stock purchase plan 381 383 193 Total stock-based compensation $ 8,439 $ 7,131 $ 6,930 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 the Company’s 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, 2021, 2020 and 2019 was $8.2 million, $6.1 million, and $6.0 million, respectively. At December 31, 2021, there was $3.1 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 1.5 years. Time-based restricted stock and restricted stock unit activity under the Plan and all predecessor stock incentive plans is as follows: Time-based Weighted-Average Nonvested at December 31, 2018 311,096 $ 21.34 Granted 71,300 $ 38.12 Vested (162,650 ) $ 18.67 Forfeited (1,280 ) $ 31.17 Nonvested at December 31, 2019 218,466 $ 28.75 Granted 54,406 $ 53.97 Vested (111,036 ) $ 30.94 Forfeited (1,114 ) $ 40.34 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 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 the Company’s 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 Weighted-Average Nonvested at December 31, 2018 182,412 $ 18.43 Granted 164,270 $ 23.82 Vested (222,004 ) $ 15.55 Forfeited (1,022 ) $ 29.23 Nonvested at December 31, 2019 123,656 $ 30.67 Granted 78,404 $ 39.60 Vested (128,762 ) $ 28.87 Forfeited (728 ) $ 41.12 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 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, 2021, there was $0.7 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, 2021, December 31, 2020 and December 31, 2019, respectively, the assumptions shown in the following table were used:​​​​​​​ Year Ended December 31, 2021 2020 2019 Dividend yield 0 % 0 % 0 % Average risk-free interest rate 0.6 % 1.3 % 2.5 % Expected term (years) 5 5 5 Expected volatility 58.7 % 38.3 % 39.1 % 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, 2021, December 31, 2020 and December 31, 2019 was $51.84, $17.81, and $14.78, respectively. SAR activity under the Plan and all predecessor stock incentive plans is as follows: SARs Weighted-Average Weighted-Average Aggregate Outstanding at December 31, 2018 476,952 $ 9.63 Granted 49,072 $ 38.85 Exercised (217,528 ) $ 6.95 Canceled (4,458 ) $ 38.85 Outstanding at December 31, 2019 304,038 $ 15.79 Granted 43,830 $ 50.39 Exercised (54,592 ) $ 9.41 Canceled — $ — 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 5.3 $ 20,335,938 Vested at December 31, 2021 161,244 $ 25.58 5.3 $ 17,647,952 Exercisable at December 31, 2021 161,244 $ 25.58 5.3 $ 17,647,952 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, 2021, employees had purchased approximately 1,831,831 shares under the plan.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2021
Postemployment Benefits [Abstract]
Employee Benefit Plans	14. EMPLOYEE BENEFIT PLANS The Company has two 401(k) Profit Sharing Plans 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 $6.6 million, $5.7 million, and $4.6 million for the years ended December 31, 2021, 2020 and 2019, respectively.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	15. INCOME TAXES Income tax provision (benefit) consists of the following (in thousands): Year Ended December 31, 2021 2020 2019 Current income tax provision: Federal $ 30,450 $ 35,423 $ 30,306 State 15,192 10,455 6,952 45,642 45,878 37,258 Deferred income tax provision: Federal 21,607 12,603 6,928 State (595 ) 522 778 21,012 13,125 7,706 Total income tax provision $ 66,654 $ 59,003 $ 44,964 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, 2021 2020 2019 U.S. Federal statutory taxes $ 57,832 $ 49,273 $ 39,838 State and local taxes, net of U.S. Federal benefit 12,174 10,641 8,412 Permanent items 1,208 1,198 1,266 Excess tax benefits from vesting or settlement of stock compensation awards (2,868 ) (1,635 ) (3,540 ) Federal credits (686 ) (565 ) (654 ) Other (1,006 ) 91 (358 ) Total income tax provision $ 66,654 $ 59,003 $ 44,964 Deferred tax assets and liabilities consist of the following (in thousands): As of December 31, 2021 2020 Deferred tax assets: Net operating losses $ 64 $ 43 Residential product warranty reserve 7,260 7,532 Stock-based compensation 1,305 1,071 Accruals not currently deductible and other 1,371 2,041 Inventories 2,210 5,548 Operating lease liability 8,965 9,081 Deferred revenue 2,935 — Goodwill amortization 6,858 — State tax credit carryforwards 3,394 3,345 As of December 31, 2021 2020 Gross deferred tax assets, before valuation allowance 34,362 28,661 Valuation allowance (2,232 ) (2,775 ) Gross deferred tax assets, after valuation allowance 32,130 25,886 Deferred tax liabilities: Depreciation (63,483 ) (29,792 ) Operating lease right-of-use (8,635 ) (8,755 ) Goodwill amortization — (5,775 ) Other (3,979 ) (4,520 ) Gross deferred tax liabilities (76,097 ) (48,842 ) Net deferred tax liability $ (43,967 ) $ (22,956 ) 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, 2021, the Company had a valuation allowance of $2.2 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, 2021, 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, 2021, for certain tax jurisdictions, tax years 2018 through 2021

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2021
Segment Reporting [Abstract]
Segment Information	16. SEGMENT INFORMATION The Company operates in two reportable segments: • Trex Residential manufactures composite decking and railing and related products marketed under the brand name Trex ® • Trex Commercial designs, engineers, and markets modular and architectural railing and staging systems for commercial and multi-family market, including sports stadiums and performing arts venues. The segment’s products are sold through architects, specifiers, contractors, and others doing business within the segment’s commercial market. The Company’s reportable segments have been determined in accordance with its internal management structure, which is organized 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 Income Tax Capital Total Assets 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 Total $ 1,196,952 $ 208,737 $ 311,322 $ 35,946 $ 66,654 $ 159,394 $ 920,321 December 31, 2020 Trex Residential $ 827,792 $ 171,197 $ 244,817 $ 17,131 $ 57,488 $ 171,784 $ 676,948 Trex Commercial 53,039 4,434 6,758 809 1,515 1,039 93,544 Total $ 880,831 $ 175,631 $ 251,575 $ 17,940 $ 59,003 $ 172,823 $ 770,492 December 31, 2019 Trex Residential $ 694,267 $ 142,811 $ 199,020 $ 13,413 $ 44,292 $ 65,399 $ 503,883 Trex Commercial 51,080 1,927 3,210 618 672 1,866 88,356 Total $ 745,347 $ 144,738 $ 202,230 $ 14,031 $ 44,964 $ 67,265 $ 592,239 (1) For the year ended December 31, 2021, total 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 Income Tax Depreciation EBITDA December 31, 2021 Trex Residential $ 247,059 $ (15 ) $ 79,500 $ 34,941 $ 361,485 Trex Commercial (38,322 ) — (12,846 ) 1,005 (50,163 ) Total $ 208,737 $ (15 ) $ 66,654 $ 35,946 $ 311,322 December 31, 2020 Trex Residential $ 171,197 $ (999 ) $ 57,488 $ 17,131 $ 244,817 Trex Commercial 4,434 — 1,515 809 6,758 Total $ 175,631 $ (999 ) $ 59,003 $ 17,940 $ 251,575 December 31, 2019 Trex Residential $ 142,811 $ (1,496 ) $ 44,292 $ 13,413 $ 199,020 Trex Commercial 1,927 (7 ) 672 618 3,210 Total $ 144,738 $ (1,503 ) $ 44,964 $ 14,031 $ 202,230

Seasonality

Seasonality	12 Months Ended
	Dec. 31, 2021
Text Block [Abstract]
Seasonality	17. SEASONALITY The operating results for Trex Residential have historically varied from quarter to quarter. Seasonal, erratic or prolonged adverse weather conditions in certain geographic regions 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. The operating results for Trex Commercial have not historically varied from quarter to quarter as a result of seasonality. However, they are driven by the timing of individual projects, which may vary significantly each period.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	18. 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, 2021, 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 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, 2021, the Company has purchase commitments under material supply contracts of $47 million for the year ending December 31, 2022, and a total of $94 million for the years ending December 31, 2023 through 2026. Product Warranty The Company warrants that its Trex Residential products will be free from material defects in workmanship and materials. This warranty generally extends for a period of 25 years for residential use and 10 years for commercial use, excluding Trex Signature ® ® ® ® one The Company 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. The number of incoming claims received in the year ended December 31, 2021 was lower than the number of claims received in the year ended December 31, 2020 and lower than the Company’s expectations for 2021. Average cost per claim experienced in the year ended December 31, 2021 was higher than that experienced in the year ended December 31, 2020 but was slightly lower than the Company’s expectations for 2021. The Company believes its reserve at December 31, 2021 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 $1.9 million change in the surface flaking warranty reserve. The Company also maintains a warranty reserve for the settlement of other residential product warranty claims and records the provision at the time of product sale. The following is a reconciliation of the Company’s residential product warranty reserve (in thousands): Year Ended December 31, 2021 Surface Other Total Beginning balance, January 1 $ 21,325 $ 8,148 $ 29,473 Provisions and changes in estimates — 3,846 3,846 Settlements made during the period (2,783 ) (1,941 ) (4,724 ) Ending balance, December 31 $ 18,542 $ 10,053 $ 28,595 Year Ended December 31, 2020 Surface Other Total Beginning balance, January 1 $ 19,024 $ 6,470 $ 25,494 Provisions and changes in estimates 6,479 3,382 9,861 Settlements made during the period (4,178 ) (1,704 ) (5,882 ) Ending balance, December 31 $ 21,325 $ 8,148 $ 29,473 Trex Residential Arkansas Manufacturing Facility On October 26, 2021, the Company announced its plan to add a third U.S. based Trex Residential manufacturing facility in Little Rock, Arkansas. The new campus will sit on nearly 300 acres of land and will address increased demand for Trex Residential outdoor living products. Construction is slated to begin in early 2022 with the first production output anticipated in 2024. Funded primarily through ongoing cash generation, the Company expects to invest approximately $400 million over the next five years in the development of the new Arkansas site.

Interim Financial Data (Unaudit

Interim Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2021
Quarterly Financial Information Disclosure [Abstract]
Interim Financial Data (Unaudited)	19. INTERIM FINANCIAL DATA (Unaudited) Three Months Ended December 31, September 30, June 30, March 31, December 31, September 30, June 30, March 31, (In thousands, except share and per share data) Net sales $ 303,960 $ 335,872 $ 311,596 $ 245,524 $ 228,286 $ 231,502 $ 220,648 $ 200,395 Gross profit $ 118,180 $ 128,250 $ 118,273 $ 95,801 $ 92,392 $ 84,964 $ 92,405 $ 89,696 Net income $ 25,031 $ 73,795 $ 61,366 $ 48,545 $ 43,301 $ 42,710 $ 47,218 $ 42,402 Basic earnings per common share $ 0.22 $ 0.64 $ 0.53 $ 0.42 $ 0.37 $ 0.37 $ 0.41 $ 0.37 Basic weighted average common shares outstanding 115,360,256 115,344,015 115,362,757 115,663,366 115,791,757 115,773,030 115,733,934 116,259,058 Diluted earnings per common share $ 0.21 $ 0.64 $ 0.53 $ 0.42 $ 0.37 $ 0.37 $ 0.41 $ 0.37 Diluted weighted average common shares outstanding 115,631,911 115,625,760 115,662,626 116,017,400 116,169,754 116,134,623 116,061,988 116,647,442 The operating results for Trex Residential have historically varied from quarter to quarter. Seasonal, erratic or prolonged adverse weather conditions in certain geographic regions reduce the level of home improvement and construction activity and can shift demand for its products to a later period. The operating results for Trex Commercial have not historically varied from quarter to quarter as a result of seasonality; however, they are driven by the timing of individual projects, which may vary significantly each period. On July 29, 2020, the Company’s Board of Directors approved a two-for-one

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Accounts and Reserves	12 Months Ended
	Dec. 31, 2021
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Schedule II - Valuation and Qualifying Accounts and Reserves	TREX COMPANY, INC. (In thousands) Descriptions Balance at Additions Deductions Balance 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 Year ended December 31, 2020: Trex Residential product warranty reserve $ 25,494 $ 9,861 $ (5,882 ) $ 29,473 Income tax valuation allowance $ 2,988 $ 1 $ (214 ) $ 2,775 Year ended December 31, 2019: Trex Residential product warranty reserve $ 30,754 $ 979 $ (6,239 ) $ 25,494 Income tax valuation allowance $ 3,015 $ — $ (27 ) $ 2,988

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2021
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 and its wholly-owned subsidiary, Trex Commercial Products, Inc. Intercompany accounts and transactions have been eliminated in consolidation. The COVID-19 COVID-19
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, 2021, 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 and for satisfied performance obligations for Trex Commercial 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, 2021 and December 31, 2020. In the years ended December 31, 2021, 2020, and 2019 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, 2021, three customers of Trex Residential represented approximately 61% of the Company’s total net sales. For the year ended December 31, 2020, three customers of Trex Residential represented approximately 56% of the Company’s total net sales. For the year ended December 31, 2019, three customers of Trex Residential represented approximately 57% of the Company’s total net sales. At December 31, 2021 two customers represented 29% and 25%, respectively, of the Company’s total accounts receivable balance. At December 31, 2020 two customers represented 27% and 15%, respectively, of the Company’s accounts receivable balance. For each year ended December 31, 2021, 2020, and 2019, approximately 26%, 28%, and 27%, respectively, of the Company’s materials purchases at Trex Residential were purchased from its four largest suppliers.
Inventories	Inventories Inventories for the Company’s composite decking and railing products at Trex Residential are valued at the lower of cost (last-in, first-out, A majority of the Company’s products at Trex Residential are made in a proprietary process that combines reclaimed wood fibers and scrap polyethylene. The Company 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. Inventories for the Company’s railing and staging products at Trex Commercial for the commercial and multi-family market are valued at the lower of cost (first-in, first-out Work-in
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. Unpaid liabilities related to property, plant and equipment are included in accounts payable and were $2.6 million and $12.9 million at December 31, 2021 and December 31, 2020, respectively. 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 equipment 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 the estimated useful life of the asset. 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 and certain 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 hierarchy: • 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. The Company has determined that it has 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. 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 2021, 2020 and 2019, the Company completed its annual impairment test of goodwill for its 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 years 2020 and 2019, the Company completed its annual impairment test of goodwill for its commercial railing reporting unit and its staging reporting unit utilizing the qualitative assessment and concluded that it was not more likely than not that the fair value of the respective reporting unit was less than its carrying amount. For fiscal year 2021, the Company determined that it was necessary to perform the goodwill impairment test for its 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 delay in new projects due to lingering uncertainty created in the commercial railing and staging markets by the COVID-19 virus. The delay in new projects, coupled with the Company’s successful fulfillment of its pre-pandemic projects, resulted in lower project backlog and reduced forecasted net sales and EBITDA, which became apparent in the fourth quarter of 2021. As a result, the Company recognized an impairment charge at its commercial railing reporting unit and at its staging reporting unit tax-deductible Goodwill and Other Intangible Assets, Net 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 its Trex Residential decking products will be free from material defects in workmanship and materials. This warranty generally extends for a period of 25 years for residential use and 10 years for commercial use. With respect to Trex Signature ® ® ® ® one
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 satisfies its performance obligation over time as work progresses because control is transferred continuously to its customers. Revenue and estimated profit are 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 include all direct material, labor, subcontract and certain indirect costs. The Company reviews and updates its estimates regularly and recognizes 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, 2021, the Company has a valuation allowance of $2.2 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, 2021, 2020, and 2019, research and development costs were $6.0 million, $3.4 million, and $4.5 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, 2021 and December 31, 2020, $3.1 million and $0.01 million was included in prepaid expenses for production costs, respectively. For the years ended December 31, 2021, 2020, and 2019, branding expenses, including advertising expenses as described above, were $30.7 million, $31.7 million, and $35.7 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, 2021 and 2020.
Recently Adopted Accounting Standards	Recently Adopted Accounting Standards In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes in tax laws or rates and clarifies the accounting for transactions that result in a step-up
New Accounting Standards Not Yet Adopted	New Accounting Standards Not Yet Adopted In March 2020, the FASB issued ASU No. 2020-01, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting In November 2021, the FASB issued ASU No. 2021-10, Government Assistance (Topic 832): Disclosures by Business Entities about Government Assistance 958-605.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2021
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. Unpaid liabilities related to property, plant and equipment are included in accounts payable and were $2.6 million and $12.9 million at December 31, 2021 and December 31, 2020, respectively. 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 equipment 10 years Forklifts and tractors 5 years Computer equipment and software 5 years

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2021
Inventory Disclosure [Abstract]
Summary of Inventories	Inventories at LIFO value consist of the following as of December 31 (in thousands): 2021 2020 Finished goods $ 58,401 $ 39,048 Raw materials 56,441 44,475 Total FIFO inventories 114,842 83,523 Reserve to adjust inventories to LIFO value (36,467 ) (16,821 ) Total LIFO inventories $ 78,375 $ 66,702

Prepaid Expenses and Other As_2

Prepaid Expenses and Other Assets (Tables)	12 Months Ended
	Dec. 31, 2021
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): 2021 2020 Prepaid expenses $ 15,061 $ 7,285 Revenues in excess of billings 9,109 8,879 Income tax receivable 406 7,823 Other 576 1,323 Total prepaid expenses and other assets $ 25,152 $ 25,310

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2021
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): 2021 2020 Machinery and equipment $ 471,667 $ 312,870 Building and improvements 101,609 61,860 Forklifts and tractors 18,584 16,003 Computer equipment 15,022 11,948 Furniture and fixtures 2,283 1,534 Construction in process 87,700 157,465 Land 22,911 11,351 Total property, plant and equipment 719,776 573,031 Accumulated depreciation (259,411 ) (236,494 ) Total property, plant and equipment, net $ 460,365 $ 336,537

Accrued Expenses and Other Li_2

Accrued Expenses and Other Liabilities (Tables)	12 Months Ended
	Dec. 31, 2021
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): 2021 2020 Sales and marketing $ 16,439 $ 22,938 Compensation and benefits 25,450 21,156 Operating 7,066 6,708 Manufacturing costs 4,110 3,641 Billings in excess of revenues 1,401 1,244 Customer deposits 35 1,174 Other 3,540 5,470 Total accrued expenses and other liabilities $ 58,041 $ 62,331

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Schedule of Debt	The Applicable Rate for Revolving B Commitments means the following percentages per annum, based upon the Consolidated Debt to Consolidated EBITDA Ratio as set forth in the most recent Compliance Certificate received by BOA as the Administrative Agent and as set forth in the New Credit Agreement: Pricing Tier Consolidated Debt to EBITDA Ratio Eurodollar Rate Base Rate Loans Revolving B 1 > 2.50:1.00 2.75 % 1.75 % 0.60 % 2 < 2.50:1.00 but > 2.00:1.00 2.50 % 1.50 % 0.55 % 3 < 2.00:1.00 but > 1.50:1.00 2.25 % 1.25 % 0.50 % 4 < 1.50:1.00 1.80 % 0.80 % 0.45 %

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2021
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, 2021 and December 31, 2020 and December 31, 2019 and supplemental balance sheet information at December 31, 2021 and December 31, 2020 related to operating leases (in thousands): Supplemental Cash Flow Information For the Year Ended 2021 2020 2019 Cash paid for amounts included in the measurement of operating lease liabilities $ 8,280 $ 8,736 $ 8,479 Operating ROU assets obtained in exchange for lease liabilities $ 7,295 $ 1,427 $ 1,319 Supplemental Balance Sheet Information December 31, December 31, Operating lease ROU assets $ 34,571 $ 34,382 Operating lease liabilities: Accrued expenses and other current liabilities $ 7,066 $ 6,708 Operating lease liabilities 28,263 28,579 Total operating lease liabilities $ 35,329 $ 35,287
Maturities of operating lease liabilities	The following table summarizes maturities of operating lease liabilities at December 31, 2021 (in thousands): Maturities of operating lease liabilities 2022 $ 7,859 2023 6,884 2024 6,526 2025 4,574 2026 3,920 Thereafter 8,158 Total lease payments 37,921 Less imputed interest (2,592 ) Total operating liabilities $ 35,329

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2021
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, 2021 2020 2019 Numerator: Net income $ 208,737 $ 175,631 $ 144,738 Denominator: Basic weighted average shares outstanding 115,461,016 115,888,859 116,861,194 Effect of dilutive securities: Stock appreciation rights 180,875 192,579 248,850 Restricted stock 120,952 171,428 205,454 Diluted weighted average shares outstanding 115,762,843 116,252,866 117,315,498 Basic earnings per share $ 1.81 $ 1.52 $ 1.24 Diluted earnings per share $ 1.80 $ 1.51 $ 1.24
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, 2021 2020 2019 Restricted stock 6,296 — — Stock appreciation rights 12,602 14,697 41,540

Revenue From Contracts With C_2

Revenue From Contracts With Customers (Tables)	12 Months Ended
	Dec. 31, 2021
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, 2021 Reportable Segment Trex Trex 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 Year Ended December 31, 2020 Reportable Segment Trex Trex Total Timing of Revenue Recognition and Type of Contract Products transferred at a point in time and variable consideration contracts $ 827,792 $ — $ 827,792 Products transferred over time and fixed price contracts — 53,039 53,039 $ 827,792 $ 53,039 $ 880,831 Year Ended December 31, 2019 Reportable Segment Trex Trex Total Timing of Revenue Recognition and Type of Contract Products transferred at a point in time and variable consideration contracts $ 694,267 $ — $ 694,267 Products transferred over time and fixed price contracts — 51,080 51,080 $ 694,267 $ 51,080 $ 745,347

Good Will And Other Intangible

Good Will And Other Intangible Assets, Net (Tables)	12 Months Ended
	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Goodwill	The carrying amount of goodwill by reportable segment at December 31, 2021 and 2020 was as follows (in thousands): Trex Residential Trex Commercial Segment Trex Residential Railing Reporting Staging Balance, December 31, 2020 $ 14,216 $ 42,491 $ 11,754 $ 68,461 Impairment Charge — 42,491 11,754 54,245 Balance, December 31, 2021 $ 14,216 $ — $ — $ 14,216

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2021
Summary of Stock-Based Compensation Expense	The following table summarizes the Company’s stock-based compensation expense (in thousands): Year Ended December 31, 2021 2020 2019 Time-based restricted stock and restricted stock units $ 2,892 $ 3,219 $ 3,676 Performance-based restricted stock and restricted stock units 4,681 2,881 2,399 Stock appreciation rights 485 648 662 Employee stock purchase plan 381 383 193 Total stock-based compensation $ 8,439 $ 7,131 $ 6,930
Summary of Assumptions Used to Estimate Fair Value of Each SAR	For SARs issued in the years ended December 31, 2021, December 31, 2020 and December 31, 2019, respectively, the assumptions shown in the following table were used: Year Ended December 31, 2021 2020 2019 Dividend yield 0 % 0 % 0 % Average risk-free interest rate 0.6 % 1.3 % 2.5 % Expected term (years) 5 5 5 Expected volatility 58.7 % 38.3 % 39.1 %
SAR Activity	SAR activity under the Plan and all predecessor stock incentive plans is as follows: SARs Weighted-Average Weighted-Average Aggregate Outstanding at December 31, 2018 476,952 $ 9.63 Granted 49,072 $ 38.85 Exercised (217,528 ) $ 6.95 Canceled (4,458 ) $ 38.85 Outstanding at December 31, 2019 304,038 $ 15.79 Granted 43,830 $ 50.39 Exercised (54,592 ) $ 9.41 Canceled — $ — 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 5.3 $ 20,335,938 Vested at December 31, 2021 161,244 $ 25.58 5.3 $ 17,647,952 Exercisable at December 31, 2021 161,244 $ 25.58 5.3 $ 17,647,952
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 Weighted-Average Nonvested at December 31, 2018 311,096 $ 21.34 Granted 71,300 $ 38.12 Vested (162,650 ) $ 18.67 Forfeited (1,280 ) $ 31.17 Nonvested at December 31, 2019 218,466 $ 28.75 Granted 54,406 $ 53.97 Vested (111,036 ) $ 30.94 Forfeited (1,114 ) $ 40.34 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
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 Weighted-Average Nonvested at December 31, 2018 182,412 $ 18.43 Granted 164,270 $ 23.82 Vested (222,004 ) $ 15.55 Forfeited (1,022 ) $ 29.23 Nonvested at December 31, 2019 123,656 $ 30.67 Granted 78,404 $ 39.60 Vested (128,762 ) $ 28.87 Forfeited (728 ) $ 41.12 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

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income Tax Provision (Benefit)	Income tax provision (benefit) consists of the following (in thousands): Year Ended December 31, 2021 2020 2019 Current income tax provision: Federal $ 30,450 $ 35,423 $ 30,306 State 15,192 10,455 6,952 45,642 45,878 37,258 Deferred income tax provision: Federal 21,607 12,603 6,928 State (595 ) 522 778 21,012 13,125 7,706 Total income tax provision $ 66,654 $ 59,003 $ 44,964
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, 2021 2020 2019 U.S. Federal statutory taxes $ 57,832 $ 49,273 $ 39,838 State and local taxes, net of U.S. Federal benefit 12,174 10,641 8,412 Permanent items 1,208 1,198 1,266 Excess tax benefits from vesting or settlement of stock compensation awards (2,868 ) (1,635 ) (3,540 ) Federal credits (686 ) (565 ) (654 ) Other (1,006 ) 91 (358 ) Total income tax provision $ 66,654 $ 59,003 $ 44,964
Schedule of Deferred Tax Assets and Liabilities	Deferred tax assets and liabilities consist of the following (in thousands): As of December 31, 2021 2020 Deferred tax assets: Net operating losses $ 64 $ 43 Residential product warranty reserve 7,260 7,532 Stock-based compensation 1,305 1,071 Accruals not currently deductible and other 1,371 2,041 Inventories 2,210 5,548 Operating lease liability 8,965 9,081 Deferred revenue 2,935 — Goodwill amortization 6,858 — State tax credit carryforwards 3,394 3,345 As of December 31, 2021 2020 Gross deferred tax assets, before valuation allowance 34,362 28,661 Valuation allowance (2,232 ) (2,775 ) Gross deferred tax assets, after valuation allowance 32,130 25,886 Deferred tax liabilities: Depreciation (63,483 ) (29,792 ) Operating lease right-of-use (8,635 ) (8,755 ) Goodwill amortization — (5,775 ) Other (3,979 ) (4,520 ) Gross deferred tax liabilities (76,097 ) (48,842 ) Net deferred tax liability $ (43,967 ) $ (22,956 )

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2021
Segment Reporting [Abstract]
Details of Segment Information	Segment Data (in thousands): Net Sales Net Income EBITDA Depreciation Income Tax Capital Total Assets 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 Total $ 1,196,952 $ 208,737 $ 311,322 $ 35,946 $ 66,654 $ 159,394 $ 920,321 December 31, 2020 Trex Residential $ 827,792 $ 171,197 $ 244,817 $ 17,131 $ 57,488 $ 171,784 $ 676,948 Trex Commercial 53,039 4,434 6,758 809 1,515 1,039 93,544 Total $ 880,831 $ 175,631 $ 251,575 $ 17,940 $ 59,003 $ 172,823 $ 770,492 December 31, 2019 Trex Residential $ 694,267 $ 142,811 $ 199,020 $ 13,413 $ 44,292 $ 65,399 $ 503,883 Trex Commercial 51,080 1,927 3,210 618 672 1,866 88,356 Total $ 745,347 $ 144,738 $ 202,230 $ 14,031 $ 44,964 $ 67,265 $ 592,239
Schedule of Reconciliation of Net Income to EBITDA	Reconciliation of Net Income (Loss) to EBITDA (in thousands): Net Income / Interest Income Tax Depreciation EBITDA December 31, 2021 Trex Residential $ 247,059 $ (15 ) $ 79,500 $ 34,941 $ 361,485 Trex Commercial (38,322 ) — (12,846 ) 1,005 (50,163 ) Total $ 208,737 $ (15 ) $ 66,654 $ 35,946 $ 311,322 December 31, 2020 Trex Residential $ 171,197 $ (999 ) $ 57,488 $ 17,131 $ 244,817 Trex Commercial 4,434 — 1,515 809 6,758 Total $ 175,631 $ (999 ) $ 59,003 $ 17,940 $ 251,575 December 31, 2019 Trex Residential $ 142,811 $ (1,496 ) $ 44,292 $ 13,413 $ 199,020 Trex Commercial 1,927 (7 ) 672 618 3,210 Total $ 144,738 $ (1,503 ) $ 44,964 $ 14,031 $ 202,230

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Summary of Reconciliation of Company's Residential Product Warranty Reserve	The following is a reconciliation of the Company’s residential product warranty reserve (in thousands): Year Ended December 31, 2021 Surface Other Total Beginning balance, January 1 $ 21,325 $ 8,148 $ 29,473 Provisions and changes in estimates — 3,846 3,846 Settlements made during the period (2,783 ) (1,941 ) (4,724 ) Ending balance, December 31 $ 18,542 $ 10,053 $ 28,595 Year Ended December 31, 2020 Surface Other Total Beginning balance, January 1 $ 19,024 $ 6,470 $ 25,494 Provisions and changes in estimates 6,479 3,382 9,861 Settlements made during the period (4,178 ) (1,704 ) (5,882 ) Ending balance, December 31 $ 21,325 $ 8,148 $ 29,473

Interim Financial Data (Unaud_2

Interim Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2021
Quarterly Financial Information Disclosure [Abstract]
Summary of Interim Financial Data	Three Months Ended December 31, September 30, June 30, March 31, December 31, September 30, June 30, March 31, (In thousands, except share and per share data) Net sales $ 303,960 $ 335,872 $ 311,596 $ 245,524 $ 228,286 $ 231,502 $ 220,648 $ 200,395 Gross profit $ 118,180 $ 128,250 $ 118,273 $ 95,801 $ 92,392 $ 84,964 $ 92,405 $ 89,696 Net income $ 25,031 $ 73,795 $ 61,366 $ 48,545 $ 43,301 $ 42,710 $ 47,218 $ 42,402 Basic earnings per common share $ 0.22 $ 0.64 $ 0.53 $ 0.42 $ 0.37 $ 0.37 $ 0.41 $ 0.37 Basic weighted average common shares outstanding 115,360,256 115,344,015 115,362,757 115,663,366 115,791,757 115,773,030 115,733,934 116,259,058 Diluted earnings per common share $ 0.21 $ 0.64 $ 0.53 $ 0.42 $ 0.37 $ 0.37 $ 0.41 $ 0.37 Diluted weighted average common shares outstanding 115,631,911 115,625,760 115,662,626 116,017,400 116,169,754 116,134,623 116,061,988 116,647,442

Business and Organization - Add

Business and Organization - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2021Segment
Accounting Policies [Abstract]
Number of reportable segments	2

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)CustomerSupplierInstitution	Dec. 31, 2020USD ($)Customer	Dec. 31, 2019USD ($)Customer	Dec. 31, 2018USD ($)
Schedule Of Significant Accounting Policies [Line Items]
Maximum term of original maturities to classify as cash equivalent	3 months
Number of financial institutions where deposits are maintained | Institution	1
Valuation allowance	$ 0	$ 0
Number of customers that accounted for 10% or more of net sales | Customer	3	3	3
Number of customer accounted for 10% or more account receivable | Customer	2	2
Number of largest raw material suppliers | Supplier	4
Excess of the replacement cost of inventory over the LIFO value of inventory	$ (36,467)	$ (16,821)
Annual impairment test of goodwill	54,245	0	$ 0
Valuation allowance	2,232	2,775
Research and Development costs		6,000	3,400	$ 4,500
Prepaid expenses for production costs of advertising	3,100	10
Branding Expenses	30,700	31,700	$ 35,700
Unpaid Liabilities relates to property plant and equipment	$ 2,600	$ 12,900
Operating leases with an initial term	12 months or less
Fire At Virginia Facility [Member] | Insurance Settlement [Member]
Schedule Of Significant Accounting Policies [Line Items]
Gain loss on insurance settlement	$ 8,700
Commercial Portfolio Segment [Member] | Railing [Member]
Schedule Of Significant Accounting Policies [Line Items]
Annual impairment test of goodwill	42,491
Commercial Portfolio Segment [Member] | Staging [Member]
Schedule Of Significant Accounting Policies [Line Items]
Annual impairment test of goodwill	$ 11,754
Maximum [Member]
Schedule Of Significant Accounting Policies [Line Items]
Operating Lease terms	8 years
Minimum [Member]
Schedule Of Significant Accounting Policies [Line Items]
Operating Lease terms	1 year
Residential Use [Member]
Schedule Of Significant Accounting Policies [Line Items]
Warranty period	25 years
Residential Use [Member] | Transcend Enhance Select And Universal Fascia Product [Member]
Schedule Of Significant Accounting Policies [Line Items]
Warranty period	25 years
Residential Use [Member] | Trex Signature Railing [Member]
Schedule Of Significant Accounting Policies [Line Items]
Warranty period	25 years
Commercial Use [Member]
Schedule Of Significant Accounting Policies [Line Items]
Warranty period	10 years
Commercial Use [Member] | Transcend Enhance Select And Universal Fascia Product [Member]
Schedule Of Significant Accounting Policies [Line Items]
Warranty period	10 years
Commercial Use [Member] | Trex Signature Railing [Member]
Schedule Of Significant Accounting Policies [Line Items]
Warranty period	25 years
Commercial Use [Member] | Maximum [Member] | Commercial Railing And Staging Systems [Member]
Schedule Of Significant Accounting Policies [Line Items]
Warranty period	3 years
Commercial Use [Member] | Minimum [Member] | Commercial Railing And Staging Systems [Member]
Schedule Of Significant Accounting Policies [Line Items]
Warranty period	1 year
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Minimum [Member]
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk as percentage of total	10.00%	10.00%	10.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Customer One [Member]
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk as percentage of total	61.00%	56.00%	57.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer One [Member]
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk as percentage of total	29.00%	27.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer Two [Member]
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk as percentage of total	25.00%	15.00%
Raw Materials [Member] | Supplier Concentration Risk [Member] | Four Largest Suppliers [Member]
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk as percentage of total	26.00%	28.00%	27.00%

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Estimated Useful Lives of Property Plant and Equipment (Detail)	12 Months Ended
	Dec. 31, 2021
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

Inventories - Summary of Invent

Inventories - Summary of Inventories (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Finished goods	$ 58,401	$ 39,048
Raw materials	56,441	44,475
Total FIFO inventories	114,842	83,523
Reserve to adjust inventories to LIFO value	(36,467)	(16,821)
Total LIFO inventories	$ 78,375	$ 66,702

Inventories - Additional Inform

Inventories - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
LIFO inventory liquidations	$ 0	$ 0
Raw materials	$ 5,400,000	$ 1,500,000

Prepaid Expenses and Other As_3

Prepaid Expenses and Other Assets - Summary of Prepaid Expenses and Other Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Prepaid Expense and Other Assets [Abstract]
Prepaid expenses	$ 15,061	$ 7,285
Revenues in excess of billings	9,109	8,879
Income tax receivable	406	7,823
Other	576	1,323
Total prepaid expenses and other assets	$ 25,152	$ 25,310

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets, Net - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Line Items]
Goodwill	$ 14,216	$ 68,461
Amortization of intangible asset	400	400	$ 400
Intangible Assets	6,300	6,300
Accumulated Amortization	1,500	1,100
Commercial [Member] | Railing [Member]
Goodwill [Line Items]
Goodwill	0	42,491
Commercial [Member] | Staging [Member]
Goodwill [Line Items]
Goodwill	$ 0	$ 11,754
Domain Names [Member]
Goodwill [Line Items]
Amortization period	15 years

Good Will And Other Intangibl_2

Good Will And Other Intangible Assets, Net - Summary of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Line Items]
Balance, December 31, 2020	$ 68,461
Impairment Charge	54,245	$ 0	$ 0
Balance, December 31, 2021	14,216	68,461
Residential Reporting Unit [Member]
Goodwill [Line Items]
Balance, December 31, 2020	14,216
Impairment Charge	0
Balance, December 31, 2021	14,216	14,216
Commercial Portfolio Segment [Member] | Railing [Member]
Goodwill [Line Items]
Balance, December 31, 2020	42,491
Impairment Charge	42,491
Balance, December 31, 2021	0	42,491
Commercial Portfolio Segment [Member] | Staging [Member]
Goodwill [Line Items]
Balance, December 31, 2020	11,754
Impairment Charge	11,754
Balance, December 31, 2021	$ 0	$ 11,754

Property, Plant and Equipment -

Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 719,776	$ 573,031
Accumulated depreciation	(259,411)	(236,494)
Total property, plant and equipment, net	460,365	336,537
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	471,667	312,870
Building and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	101,609	61,860
Forklifts and Tractors [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	18,584	16,003
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	15,022	11,948
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	2,283	1,534
Construction in Process [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	87,700	157,465
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 22,911	$ 11,351

Property, Plant and Equipment_2

Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 719,776	$ 573,031
Depreciation expense	35,500	17,500	$ 13,600
Construction in Process [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 87,700	$ 157,465

Accrued Expenses and Other Li_3

Accrued Expenses and Other Liabilities - Summary of Accrued Expenses and Other Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Payables and Accruals [Abstract]
Sales and marketing	$ 16,439	$ 22,938
Compensation and benefits	25,450	21,156
Operating lease liabilities	$ 7,066	6,708
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Operating lease liabilities
Manufacturing costs	$ 4,110	3,641
Customer deposits	35	1,174
Billings in excess of revenues	1,401	1,244
Other	3,540	5,470
Total accrued expenses and other liabilities	$ 58,041	$ 62,331

Debt - Schedule Of Debt (Detail

Debt - Schedule Of Debt (Detail)	12 Months Ended
	Dec. 31, 2021
Pricing Tier One [Member]
Line of Credit Facility [Line Items]
Consolidated Debt to Consolidated EBITDA Ratio	> 2.50:1.00
Revolving B Commitment Fee	0.60%
Pricing Tier Two [Member]
Line of Credit Facility [Line Items]
Consolidated Debt to Consolidated EBITDA Ratio	< 2.50:1.00 but > 2.00:1.00
Revolving B Commitment Fee	0.55%
Pricing Tier Three [Member]
Line of Credit Facility [Line Items]
Consolidated Debt to Consolidated EBITDA Ratio	< 2.00:1.00 but > 1.50:1.00
Revolving B Commitment Fee	0.50%
Pricing Tier Four [Member]
Line of Credit Facility [Line Items]
Consolidated Debt to Consolidated EBITDA Ratio	< 1.50:1.00
Revolving B Commitment Fee	0.45%
London Interbank Offered Rate (LIBOR) [Member] | Pricing Tier One [Member]
Line of Credit Facility [Line Items]
Eurodollar Rate Loans / LIBOR Index	2.75%
London Interbank Offered Rate (LIBOR) [Member] | Pricing Tier Two [Member]
Line of Credit Facility [Line Items]
Eurodollar Rate Loans / LIBOR Index	2.50%
London Interbank Offered Rate (LIBOR) [Member] | Pricing Tier Three [Member]
Line of Credit Facility [Line Items]
Eurodollar Rate Loans / LIBOR Index	2.25%
London Interbank Offered Rate (LIBOR) [Member] | Pricing Tier Four [Member]
Line of Credit Facility [Line Items]
Eurodollar Rate Loans / LIBOR Index	1.80%
Base Rate [Member] | Pricing Tier One [Member]
Line of Credit Facility [Line Items]
Base Rate Loans	1.75%
Base Rate [Member] | Pricing Tier Two [Member]
Line of Credit Facility [Line Items]
Base Rate Loans	1.50%
Base Rate [Member] | Pricing Tier Three [Member]
Line of Credit Facility [Line Items]
Base Rate Loans	1.25%
Base Rate [Member] | Pricing Tier Four [Member]
Line of Credit Facility [Line Items]
Base Rate Loans	0.80%

Debt - Additional Information (

Debt - Additional Information (Detail) - USD ($)	May 26, 2020	Nov. 05, 2019	May 26, 2022	Dec. 31, 2021	Dec. 31, 2020
Line of Credit Facility [Line Items]
Company indebtedness				$ 0	$ 0
Remaining available borrowing capacity				300,000,000
Termination date of the Credit Agreement		Nov. 5, 2024
Federal Funds Rate [Member]
Line of Credit Facility [Line Items]
Interest rate	0.50%
Eurodollar Rate Loans [Member]
Line of Credit Facility [Line Items]
Interest rate	1.00%
Revolver Loans Portion Effective January 1 through June 30 [Member] | Fourth Amended And Restated Credit Agreement [Member]
Line of Credit Facility [Line Items]
Revolving loans in a collective maximum principal amount				250,000,000
Revolver Loans Portion Effective July 1 through December 31 [Member] | Fourth Amended And Restated Credit Agreement [Member]
Line of Credit Facility [Line Items]
Revolving loans in a collective maximum principal amount				$ 200,000,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Additional Borrowing Capacity	$ 100,000,000		$ 100,000,000
Revolving Credit Facility [Member] | BOA [Member]
Line of Credit Facility [Line Items]
Lender Percentage	47.50%
Revolving Credit Facility [Member] | Well Fargo [Member]
Line of Credit Facility [Line Items]
Lender Percentage	28.00%
Revolving Credit Facility [Member] | Regions [Member]
Line of Credit Facility [Line Items]
Lender Percentage	24.50%

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Weighted average discount rate	2.47%	3.47%
Operating lease cost	$ 8.1	$ 8.5
Weighted average remaining lease term	5 years 9 months 18 days	5 years 7 months 6 days

Leases - Supplemental Cash flow

Leases - Supplemental Cash flow Information to operating leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Supplemental cash flow information
Cash paid for amounts included in the measurement of operating lease liabilities	$ 8,280	$ 8,736	$ 8,479
Operating ROU assets obtained in exchange for lease liabilities	7,295	1,427	$ 1,319
Supplemental balance sheet information
Operating lease ROU assets	34,571	34,382
Operating lease liabilities:
Accrued expenses and other current liabilities	7,066	6,708
Operating lease liabilities	28,263	28,579
Total operating lease liabilities	$ 35,329	$ 35,287

Leases - Maturities of Operatin

Leases - Maturities of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Operating Lease Liabilities, Payments Due [Abstract]
2022	$ 7,859
2023	6,884
2024	6,526
2025	4,574
2026	3,920
Thereafter	8,158
Total lease payments	37,921
Less imputed interest	(2,592)
Total operating liabilities	$ 35,329	$ 35,287

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - $ / shares	Sep. 14, 2020	Dec. 31, 2021	Jul. 29, 2020
Equity, Class of Treasury Stock [Line Items]
Common stock, par value			$ 0.01
Description of stock split	two-for-one stock split
Stock Repurchase Programs [Member]
Equity, Class of Treasury Stock [Line Items]
Common stock repurchase program, authorized shares		11,600,000
Number of shares repurchased by the Company		3,600,000

Stockholders' Equity - Computat

Stockholders' Equity - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net income	$ 25,031	$ 73,795	$ 61,366	$ 48,545	$ 43,301	$ 42,710	$ 47,218	$ 42,402	$ 208,737	$ 175,631	$ 144,738
Denominator:
Basic weighted average shares outstanding	115,360,256	115,344,015	115,362,757	115,663,366	115,791,757	115,773,030	115,733,934	116,259,058	115,461,016	115,888,859	116,861,194
Effect of dilutive securities:
Diluted weighted average shares outstanding	115,631,911	115,625,760	115,662,626	116,017,400	116,169,754	116,134,623	116,061,988	116,647,442	115,762,843	116,252,866	117,315,498
Basic earnings per share	$ 0.22	$ 0.64	$ 0.53	$ 0.42	$ 0.37	$ 0.37	$ 0.41	$ 0.37	$ 1.81	$ 1.52	$ 1.24
Diluted earnings per share	$ 0.21	$ 0.64	$ 0.53	$ 0.42	$ 0.37	$ 0.37	$ 0.41	$ 0.37	$ 1.80	$ 1.51	$ 1.24
Stock appreciation rights [Member]
Effect of dilutive securities:
Dilutive securities									180,875	192,579	248,850
Restricted stock [Member]
Effect of dilutive securities:
Dilutive securities									120,952	171,428	205,454

Stockholders' Equity - Antidilu

Stockholders' Equity - Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
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	6,296	0	0
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	12,602	14,697	41,540

Revenue From Contracts With C_3

Revenue From Contracts With Customers - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)
Revenue from Contract with Customer [Abstract]
Revenue remaining performance obligation	$ 26.1
Revenue remaining performance obligation description	greater than one year

Revenue From Contracts With C_4

Revenue From Contracts With Customers - Summary of Disaggregated Net Sales (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue from contract with customers	$ 303,960	$ 335,872	$ 311,596	$ 245,524	$ 228,286	$ 231,502	$ 220,648	$ 200,395	$ 1,196,952	$ 880,831	$ 745,347
Products Transferred at a Point in Time and Variable Consideration Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers									1,139,266	827,792	694,267
Products Transferred Over Time and Fixed Price Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers									57,686	53,039	51,080
Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers									1,139,266	827,792	694,267
Residential [Member] | Products Transferred at a Point in Time and Variable Consideration Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers									1,139,266	827,792	694,267
Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers									57,686	53,039	51,080
Commercial [Member] | Products Transferred Over Time and Fixed Price Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers									$ 57,686	$ 53,039	$ 51,080

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Approximate number of shares employees purchased under the Employee Stock Purchase Plan	1,831,831
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	25,680,000
Number of common stock available for future issuance	11,116,654
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 10 months 24 days
Unrecognized compensation cost related to unvested awards	$ 2.8	$ 1.7	$ 0.8
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	$ 0.7
Fair value assumptions method used	Black-Scholes option-pricing model
Weighted-average fair value of grants	$ 51.84	$ 17.81	$ 14.78
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 6 months
Unrecognized compensation cost related to unvested awards	$ 3.1
Total fair value of restricted shares vested	$ 8.2	$ 6.1	$ 6
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	85.00%
Percentage of gross compensation eligible employees may elect to participate in the plan	15.00%
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	200.00%
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	0.00%

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Stock-Based Compensation Expenses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 8,439	$ 7,131	$ 6,930
Stock Appreciation Rights [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	485	648	662
Time-Based Restricted Stock and Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	2,892	3,219	3,676
Performance-Based Restricted Stock and Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	4,681	2,881	2,399
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 381	$ 383	$ 193

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, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule Of Restricted Stock Activity [Line Items]
Nonvested, Shares, Beginning Balance	160,722	218,466	311,096
Time-based Restricted Stock, Granted	33,703	54,406	71,300
Time-based Restricted Stock, Vested	(78,081)	(111,036)	(162,650)
Time-based Restricted Stock, Forfeited	(4,798)	(1,114)	(1,280)
Nonvested, Shares, Ending Balance	111,546	160,722	218,466
Nonvested, Weighted-Average Grant Price Per Share, Beginning Balance	$ 35.68	$ 28.75	$ 21.34
Weighted-Average Grant Price Per Share, Granted	100.50	53.97	38.12
Weighted-Average Grant Price Per Share, Vested	37.81	30.94	18.67
Weighted-Average Grant Price Per Share, Forfeited	66	40.34	31.17
Nonvested, Weighted-Average Grant Price Per Share, Ending Balance	$ 52.91	$ 35.68	$ 28.75

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, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule Of Restricted Stock Activity [Line Items]
Nonvested, Shares, Beginning Balance	72,570	123,656	182,412
Performance-based Restricted Stock, Granted	36,522	78,404	164,270
Performance-based Restricted Stock, Vested	(45,051)	(128,762)	(222,004)
Performance-based Restricted Stock, Forfeited	(6,273)	(728)	(1,022)
Nonvested, Shares, Ending Balance	57,768	72,570	123,656
Nonvested, Weighted-Average Grant Price Per Share, Beginning Balance	$ 43.42	$ 30.67	$ 18.43
Weighted-Average Grant Price Per Share, Granted	86.26	39.60	23.82
Weighted-Average Grant Price Per Share, Vested	39.41	28.87	15.55
Weighted-Average Grant Price Per Share, Forfeited	65.30	41.12	29.23
Nonvested, Weighted-Average Grant Price Per Share, Ending Balance	$ 71.21	$ 43.42	$ 30.67

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, 2021	Dec. 31, 2020	Dec. 31, 2019
Share Based Compensation Arrangement by Share Based Payment Award Fair Value Assumptions and Methodology [Line Items]
Dividend yield	0.00%	0.00%	0.00%
Average risk-free interest rate	0.60%	1.30%	2.50%
Expected term (years)	5 years	5 years	5 years
Expected volatility	58.70%	38.30%	39.10%

Stock-Based Compensation - SAR

Stock-Based Compensation - SAR Activity (Detail) - Stock Appreciation Rights [Member] - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule Of Stock Appreciation Rights Activity [Line Items]
SARs Outstanding, Beginning Balance	293,276	304,038	476,952
Granted, SARs	15,029	43,830	49,072
Exercised, SARs	(102,562)	(54,592)	(217,528)
Canceled, SARs	(4,745)		(4,458)
Shares Outstanding, SARs, Ending Balance	200,998	293,276	304,038
Outstanding, Weighted Average Grant Price Per Share, Beginning Balance	$ 22.15	$ 15.79	$ 9.63
Vested, SARs	161,244
Granted, Weighted Average Grant Price Per Share	$ 104.56	50.39	38.85
Exercisable, SARs	161,244
Exercised, Weighted Average Grant Price Per Share	$ 9.45	9.41	6.95
Canceled, Weighted Average Grant Price Per Share	61.66	0
Outstanding, Weighted Average Grant Price Per Share, Ending Balance	33.86	$ 22.15	$ 15.79
Vested, Weighted Average Grant Price Per Share	25.58
Exercisable, Weighted Average Grant Price Per Share	$ 25.58
Weighted Average Remaining Contractual Life, Outstanding	5 years 3 months 18 days
Weighted Average Remaining Contractual Life, Vested	5 years 3 months 18 days
Weighted Average Remaining Contractual Life, Exercisable	5 years 3 months 18 days
Aggregate Intrinsic Value, Outstanding	$ 20,335,938
Aggregate Intrinsic Value, Vested	17,647,952
Aggregate Intrinsic Value, Exercisable	$ 17,647,952

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Employer's contribution	$ 6.6	$ 5.7	$ 4.6

Income Taxes - Income Tax Provi

Income Taxes - Income Tax Provision (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current income tax provision:
Federal	$ 30,450	$ 35,423	$ 30,306
State	15,192	10,455	6,952
Total	45,642	45,878	37,258
Deferred income tax provision:
Federal	21,607	12,603	6,928
State	(595)	522	778
Total	21,012	13,125	7,706
Total income tax provision	$ 66,654	$ 59,003	$ 44,964

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, 2021	Dec. 31, 2020	Dec. 31, 2019
Effective Income Tax Rate Reconciliation, Amount [Abstract]
U.S. Federal statutory taxes	$ 57,832	$ 49,273	$ 39,838
State and local taxes, net of U.S. Federal benefit	12,174	10,641	8,412
Permanent items	1,208	1,198	1,266
Excess tax benefits from vesting or settlement of stock compensation awards	(2,868)	(1,635)	(3,540)
Federal credits	(686)	(565)	(654)
Other	(1,006)	91	(358)
Total income tax provision	$ 66,654	$ 59,003	$ 44,964

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Net operating losses	$ 64	$ 43
Residential product warranty reserve	7,260	7,532
Stock-based compensation	1,305	1,071
Accruals not currently deductible and other	1,371	2,041
Inventories	2,210	5,548
Operating lease liability	8,965	9,081
Deferred revenue	2,935	0
Goodwill amortization	6,858	0
State tax credit carryforwards	3,394	3,345
Gross deferred tax assets, before valuation allowance	34,362	28,661
Valuation allowance	(2,232)	(2,775)
Gross deferred tax assets, after valuation allowance	32,130	25,886
Deferred tax liabilities:
Depreciation	(63,483)	(29,792)
Operating lease right-of-use asset	(8,635)	(8,755)
Goodwill amortization	0	(5,775)
Inventories and other	(3,979)	(4,520)
Gross deferred tax liabilities	(76,097)	(48,842)
Net deferred tax liability	$ (43,967)	$ (22,956)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2021USD ($)Tax_Positions	Dec. 31, 2020USD ($)
Income Tax Contingency [Line Items]
Valuation allowance	$ 2,232,000	$ 2,775,000
Unrecognized tax benefits number of tax matters | Tax_Positions	0
Unrecognized tax benefits related to identified uncertain tax positions	$ 0
Tax years subject to examination	2018 2019 2020

Segment Information - Additiona

Segment Information - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)RetailerSegment	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Segment Reporting Information [Line Items]
Number of reportable segment | Segment	2
Number of national retailers | Retailer	2
Impairment Charge | $	$ 54,245	$ 0	$ 0

Segment Information - Details o

Segment Information - Details of Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net Sales	$ 303,960	$ 335,872	$ 311,596	$ 245,524	$ 228,286	$ 231,502	$ 220,648	$ 200,395	$ 1,196,952	$ 880,831	$ 745,347
Net Income	25,031	$ 73,795	$ 61,366	$ 48,545	43,301	$ 42,710	$ 47,218	$ 42,402	208,737	175,631	144,738
Depreciation and amortization									35,946	17,939	14,031
Income Tax Expense									66,654	59,003	44,964
Total Assets	920,321				770,492				920,321	770,492
Residential [Member]
Segment Reporting Information [Line Items]
Net Sales									1,139,266	827,792	694,267
Commercial [Member]
Segment Reporting Information [Line Items]
Net Sales									57,686	53,039	51,080
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales									1,196,952	880,831	745,347
Net Income									208,737	175,631	144,738
EBITDA									311,322	251,575	202,230
Depreciation and amortization									35,946	17,940	14,031
Income Tax Expense									66,654	59,003	44,964
Capital Expenditures									159,394	172,823	67,265
Total Assets	920,321				770,492				920,321	770,492	592,239
Operating Segments [Member] | Residential [Member]
Segment Reporting Information [Line Items]
Net Sales									1,139,266	827,792	694,267
Net Income									247,059	171,197	142,811
EBITDA									361,485	244,817	199,020
Depreciation and amortization									34,941	17,131	13,413
Income Tax Expense									79,500	57,488	44,292
Capital Expenditures									157,568	171,784	65,399
Total Assets	881,225				676,948				881,225	676,948	503,883
Operating Segments [Member] | Commercial [Member]
Segment Reporting Information [Line Items]
Net Sales									57,686	53,039	51,080
Net Income									(38,322)	4,434	1,927
EBITDA									(50,163)	6,758	3,210
Depreciation and amortization									1,005	809	618
Income Tax Expense									(12,846)	1,515	672
Capital Expenditures									1,826	1,039	1,866
Total Assets	$ 39,096				$ 93,544				$ 39,096	$ 93,544	$ 88,356

Segment Information - Schedule

Segment Information - Schedule of Reconciliation of Net Income to EBITDA (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net Income	$ 25,031	$ 73,795	$ 61,366	$ 48,545	$ 43,301	$ 42,710	$ 47,218	$ 42,402	$ 208,737	$ 175,631	$ 144,738
Interest (income) expense, net									(15)	(999)	(1,503)
Income Tax Expense									66,654	59,003	44,964
Depreciation and Amortization									35,946	17,939	14,031
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Income									208,737	175,631	144,738
Interest (income) expense, net									(15)	(999)	(1,503)
Income Tax Expense									66,654	59,003	44,964
Depreciation and Amortization									35,946	17,940	14,031
EBITDA									311,322	251,575	202,230
Operating Segments [Member] | Residential [Member]
Segment Reporting Information [Line Items]
Net Income									247,059	171,197	142,811
Interest (income) expense, net									(15)	(999)	(1,496)
Income Tax Expense									79,500	57,488	44,292
Depreciation and Amortization									34,941	17,131	13,413
EBITDA									361,485	244,817	199,020
Operating Segments [Member] | Commercial [Member]
Segment Reporting Information [Line Items]
Net Income									(38,322)	4,434	1,927
Interest (income) expense, net											(7)
Income Tax Expense									(12,846)	1,515	672
Depreciation and Amortization									1,005	809	618
EBITDA									$ (50,163)	$ 6,758	$ 3,210

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) $ in Millions	Oct. 26, 2021USD ($)a	Dec. 31, 2021USD ($)
Schedule Of Commitments And Contingencies [Line Items]
Change in warranty reserve for disclosure purposes only		$ 1.9
Area of Land | a	300
Residential Portfolio Segment [Member]
Schedule Of Commitments And Contingencies [Line Items]
Land and Land Improvements	$ 400
Land Improvements Term Period	5 years
Minimum [Member]
Schedule Of Commitments And Contingencies [Line Items]
Average period for PE material purchases under short-term supply contracts for which pricing is negotiated as needed		1 year
Maximum [Member]
Schedule Of Commitments And Contingencies [Line Items]
Average period for PE material purchases under short-term supply contracts for which pricing is negotiated as needed		2 years
Surface Flaking Warranty Reserve [Member]
Schedule Of Commitments And Contingencies [Line Items]
Percentage change in warranty claims used as a threshold for disclosure		10.00%
Residential Use [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
Transcend Enhance Select And Universal Fascia Product [Member] | Residential Use [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period		25 years
Transcend Enhance Select And Universal Fascia Product [Member] | Commercial Use [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period		10 years
Trex Signature Railing [Member] | Residential Use [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period		25 years
Trex Signature Railing [Member] | Commercial Use [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period		25 years
Commercial Railing And Staging Systems [Member] | Commercial Use [Member] | Minimum [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period		1 year
Commercial Railing And Staging Systems [Member] | Commercial Use [Member] | Maximum [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period		3 years
Raw Material Supply Contracts [Member]
Schedule Of Commitments And Contingencies [Line Items]
Purchase commitment, due in second year		$ 47
Purchase commitment, due in third year		94
Purchase commitment, due in fourth year		$ 94

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, 2021	Dec. 31, 2020
Product Warranty Liability [Line Items]
Beginning balance	$ 29,473	$ 25,494
Provisions and changes in estimates	3,846	9,861
Settlements made during the period	(4,724)	(5,882)
Ending balance	28,595	29,473
Surface Flaking [Member]
Product Warranty Liability [Line Items]
Beginning balance	21,325	19,024
Provisions and changes in estimates		6,479
Settlements made during the period	(2,783)	(4,178)
Ending balance	18,542	21,325
Other Residential [Member]
Product Warranty Liability [Line Items]
Beginning balance	8,148	6,470
Provisions and changes in estimates	3,846	3,382
Settlements made during the period	(1,941)	(1,704)
Ending balance	$ 10,053	$ 8,148

Interim Financial Data (Unaud_3

Interim Financial Data (Unaudited) - Summary of Interim Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Quarterly Financial Data [Abstract]
Net sales	$ 303,960	$ 335,872	$ 311,596	$ 245,524	$ 228,286	$ 231,502	$ 220,648	$ 200,395	$ 1,196,952	$ 880,831	$ 745,347
Gross profit	118,180	128,250	118,273	95,801	92,392	84,964	92,405	89,696	460,504	359,457	306,503
Net income	$ 25,031	$ 73,795	$ 61,366	$ 48,545	$ 43,301	$ 42,710	$ 47,218	$ 42,402	$ 208,737	$ 175,631	$ 144,738
Basic earnings per common share	$ 0.22	$ 0.64	$ 0.53	$ 0.42	$ 0.37	$ 0.37	$ 0.41	$ 0.37	$ 1.81	$ 1.52	$ 1.24
Basic weighted average common shares outstanding	115,360,256	115,344,015	115,362,757	115,663,366	115,791,757	115,773,030	115,733,934	116,259,058	115,461,016	115,888,859	116,861,194
Diluted earnings per common share	$ 0.21	$ 0.64	$ 0.53	$ 0.42	$ 0.37	$ 0.37	$ 0.41	$ 0.37	$ 1.80	$ 1.51	$ 1.24
Diluted weighted average common shares outstanding	115,631,911	115,625,760	115,662,626	116,017,400	116,169,754	116,134,623	116,061,988	116,647,442	115,762,843	116,252,866	117,315,498

Interim Financial Data (Unaud_4

Interim Financial Data (Unaudited) - Additional Information (Detail)	Jul. 29, 2020$ / shares	Dec. 31, 2021$ / shares	Dec. 31, 2020$ / shares
Quarterly Financial Data [Abstract]
Stock split	2
Common stock, par value	$ 0.01	$ 0.01	$ 0.01

Schedule II - Valuation and Q_2

Schedule II - Valuation and Qualifying Accounts and Reserves (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Warranty Reserve [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 29,473	$ 25,494	$ 30,754
Additions (Reductions) Charged to Cost and Expenses	3,846	9,861	979
Deductions	(4,724)	(5,882)	(6,239)
Balance at End of Period	28,595	29,473	25,494
Valuation Allowance of Deferred Tax Assets [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	2,775	2,988	3,015
Additions (Reductions) Charged to Cost and Expenses		1
Deductions	(543)	(214)	(27)
Balance at End of Period	$ 2,232	$ 2,775	$ 2,988