The AZEK Company Inc. (AZEK) 10-Q 7 Feb 24 2024 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Dec. 31, 2023	Jan. 31, 2024
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2024
Document Period End Date	Dec. 31, 2023
Current Fiscal Year End Date	--09-30
Entity Registrant Name	AZEK Co Inc.
Entity Central Index Key	0001782754
Entity File Number	001-39322
Entity Tax Identification Number	90-1017663
Entity Interactive Data Current	Yes
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Incorporation, State or Country Code	DE
Entity Emerging Growth Company	false
Entity Address, Address Line One	1330 W Fulton Street, Suite 350
Entity Address, City or Town	Chicago
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60607
City Area Code	877
Local Phone Number	275-2935
Title of 12(b) Security	Class A Common Stock, par value $0.001 per share
Trading Symbol	AZEK
Security Exchange Name	NYSE
Common Class A [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		145,826,079
Common Class B [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		0

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Current assets:
Cash and cash equivalents	$ 274,759	$ 278,314
Trade receivables, net of allowances	32,398	57,660
Inventories	261,562	221,101
Prepaid expenses	16,528	13,595
Other current assets	8,131	12,300
Total current assets	593,378	582,970
Property, plant and equipment - net	456,504	501,023
Goodwill	967,816	994,271
Intangible assets - net	183,604	199,497
Other assets	87,426	87,793
Total assets	2,288,728	2,365,554
Current liabilities:
Accounts payable	43,119	56,015
Accrued rebates	67,925	60,974
Accrued interest	368	260
Current portion of long-term debt obligations	6,000	6,000
Accrued expenses and other liabilities	80,999	71,994
Total current liabilities	198,411	195,243
Deferred income taxes	47,117	56,330
Long-term debt—less current portion	579,111	580,265
Other non-current liabilities	104,784	104,073
Total liabilities	929,423	935,911
Commitments and contingencies (See Note 17)
Stockholders' equity:
Preferred stock, $0.001 par value; 1,000,000 shares authorized and no shares issued or outstanding at December 31, 2023 and September 30, 2023, respectively
Additional paid‑in capital	1,650,160	1,662,322
Accumulated deficit	(19,328)	(45,047)
Accumulated other comprehensive income (loss)	(1,217)	1,878
Treasury stock, at cost, XX,XXX,XXX and 8,268,423 shares at December 31, 2023 and September 30, 2023, respectively	(270,466)	(189,666)
Total stockholders' equity	1,359,305	1,429,643
Total liabilities and stockholders' equity	2,288,728	2,365,554
Common Class A [Member]
Stockholders' equity:
Common stock	$ 156	$ 156

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2023	Sep. 30, 2023
Preferred stock, par value per share	$ 0.001	$ 0.001
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, shares issued	156,341,203	155,967,736
Treasury stock, shares	10,560,030	8,268,423
Common Class A [Member]
Common stock, par value per share	$ 0.001	$ 0.001
Common stock, shares authorized	1,100,000,000	1,100,000,000
Common stock, shares issued	156,341,203	155,967,736
Common Class B [Member]
Common stock, par value per share	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	0	100
Common stock, shares outstanding	0	100

Condensed Consolidated Statemen

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net sales	$ 240,444	$ 216,259
Cost of sales	149,011	168,680
Gross profit	91,433	47,579
Selling, general and administrative expenses	77,246	73,444
Loss on disposal of property, plant and equipment	2,185
Operating income (loss)	12,002	(25,865)
Other income and expenses:
Interest expense, net	7,910	9,299
Gain on sale of business	(38,515)
Total other income and expenses	(30,605)	9,299
Income (loss) before income taxes	42,607	35,164
Income tax expense (benefit)	16,888	(9,328)
Net income (loss)	25,719	(25,836)
Other comprehensive income (loss):
Unrealized loss due to change in fair value of derivatives, net of tax	(3,095)	(1,796)
Total other comprehensive income (loss)	(3,095)	(1,796)
Comprehensive income (loss)	$ 22,624	$ (27,632)
Net income (loss) per common share:
Basic	$ 0.17	$ (0.17)
Diluted	$ 0.17	$ (0.17)
Weighted-average common shares outstanding:
Basic	147,297,662	150,877,635
Diluted	148,876,282	150,877,635

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Class A [Member]	Common Class B [Member]	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Sep. 30, 2022	$ 1,444,443			$ 155		$ (73,088)	$ 1,630,378	$ (113,002)
Beginning balance (in shares) at Sep. 30, 2022				155,157,220	100	4,116,570
Net Income (Loss)	(25,836)							(25,836)
Other comprehensive income (loss)	(1,796)								$ (1,796)
Stock-based compensation	3,909						3,909
Cancellation of restricted stock awards (in shares)				(14,663)
Issuance of common stock under employee stock plan, net of shares withheld for taxes	(460)						(460)
Issuance of common stock under employee stock plan, net of shares withheld for taxes (in shares)				54,308
Treasury stock purchases	(7,488)					$ (7,488)
Treasury stock purchases (in shares)						352,760
Ending balance at Dec. 31, 2022	1,412,772			$ 155		$ (80,576)	1,633,827	(138,838)	(1,796)
Ending balance (in shares) at Dec. 31, 2022				155,196,865	100	4,469,330
Beginning balance at Sep. 30, 2023	$ 1,429,643			$ 156		$ (189,666)	1,662,322	(45,047)	1,878
Beginning balance (in shares) at Sep. 30, 2023	155,967,736	155,967,736	100	155,967,736	100	8,268,423
Net Income (Loss)	$ 25,719							25,719
Other comprehensive income (loss)	(3,095)								(3,095)
Stock-based compensation	8,422						8,422
Exercise of vested stock options	3,238						3,238
Exercise of vested stock options (in shares)				136,885
Issuance of common stock under employee stock plan, net of shares withheld for taxes	(3,822)						(3,822)
Issuance of common stock under employee stock plan, net of shares withheld for taxes (in shares)				236,482
Conversion of Class B common stock into Class A common stock (in shares)				100	(100)
Treasury stock purchases	(100,800)					$ (80,800)	(20,000)
Treasury stock purchases (in shares)						2,291,607
Ending balance at Dec. 31, 2023	$ 1,359,305			$ 156		$ (270,466)	$ 1,650,160	$ (19,328)	$ (1,217)
Ending balance (in shares) at Dec. 31, 2023	156,341,203	156,341,203	0	156,341,203	0	10,560,030

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2023
Operating activities:
Net Income (Loss)	$ 25,719	$ (25,836)
Adjustments to reconcile net income (loss) to net cash flows provided by (used in) operating activities:
Depreciation	21,773	22,002
Amortization of intangibles	10,164	11,837
Non-cash interest expense	412	412
Non-cash lease expense	(48)	(56)
Deferred income tax (benefit) provision	(8,192)	1,504
Non-cash compensation expense	8,422	5,801
Fair value adjustment for contingent consideration		400
Loss on disposition of property, plant and equipment	2,185	1,003
Gain on sale of business	(38,515)
Changes in certain assets and liabilities:
Trade receivables	21,151	21,869
Inventories	(62,127)	(20,978)
Prepaid expenses and other currents assets	(2,031)	(16,711)
Accounts payable	(9,319)	13,029
Accrued expenses and interest	15,448	(7,831)
Other assets and liabilities	(1,330)	(36)
Net cash provided by (used in) operating activities	(16,288)	6,409
Investing activities:
Purchases of property, plant and equipment	(17,681)	(30,328)
Proceeds from disposition of fixed assets	122	65
Divestiture, net of cash disposed	133,089
Net cash provided by (used in) investing activities	115,530	(30,263)
Financing activities:
Payments on Term Loan Agreement	(1,500)	(1,500)
Repayments of finance lease obligations	(713)	(650)
Exercise of vested stock options	3,238
Cash paid for shares withheld for taxes	(3,822)	(460)
Purchases of treasury stock	(100,000)	(7,488)
Net cash used in financing activities	(102,797)	(10,098)
Net decrease in cash and cash equivalents	(3,555)	33,952
Cash and cash equivalents – Beginning of period	278,314	120,817	$ 120,817
Cash and cash equivalents – End of period	274,759	86,865	$ 278,314
Supplemental cash flow disclosure:
Cash paid for interest, net of amounts capitalized	7,349	13,020
Cash paid for income taxes, net	1,351	112
Supplemental non-cash investing and financing disclosure:
Capital expenditures in accounts payable at end of period	2,603	16,275
Right-of-use operating and finance lease assets obtained in exchange for lease liabilities	$ 2,460	$ 1,968

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Pay vs Performance Disclosure
Net Income (Loss)	$ 25,719	$ (25,836)

Organization and Summary of Sig

Organization and Summary of Significant Accounting Policies	3 Months Ended
	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Summary of Significant Accounting Policies	1. ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES a. Organization The AZEK Company Inc. (the “Company”, “we”, “us” or “our”) is a Delaware corporation that holds all of the limited liability company interests in The AZEK Group LLC (f/k/a CPG International LLC), the entity which directly and indirectly holds all of the equity interests in the operating subsidiaries and which changed its name from CPG International LLC to The AZEK Group LLC on August 1, 2023. The Company is an industry-leading designer and manufacturer of beautiful, low-maintenance and environmentally sustainable building products for residential, commercial and industrial markets. The Company’s products include decking, railing, trim, porch, moulding, pergolas, outdoor furniture, bathroom and locker systems, and, prior to the Company’s divestiture of its Vycom business, also included extruded plastic sheet products and other non-fabricated products for special applications in industrial markets. The Company operates in various locations throughout the United States. The Company’s residential products are primarily branded under the brand names AZEK ® , TimberTech ® , VERSATEX ® , ULTRALOX ® , StruXure ® and INTEX ® , while the commercial products are branded under brand names including Scranton Products ® , Aria Partitions ® , Eclipse Partitions ® , Hiny Hiders ® partitions, Tufftec Lockers ® and Duralife Lockers ® . b. Summary of Significant Accounting Policies Basis of Presentation The Company operates on a fiscal year ending September 30. The accompanying unaudited Condensed Consolidated Financial Statements and notes have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information, and in management’s opinion, includes all adjustments, consisting of only normal recurring adjustments, necessary for the fair statement of the Company’s financial position, its results of operations and cash flows for the interim periods presented. The results of operations for the three months ended December 31, 2023 and the cash flows for the three months ended December 31, 2023 are not necessarily indicative of the results to be expected for the full fiscal year or any other period. The Company’s financial condition and results of operations are affected by a number of factors, including, but not limited to, the cost to manufacture and distribute products, cost of raw materials, inflation, consumer spending and preferences, interest rates, the impact of any supply chain disruptions, economic conditions, and/or any adverse effects from geopolitical conflicts, global health pandemics and other factors beyond the Company’s control. Management cannot predict the degree to, or the period over, which the Company may be affected by such factors. The accompanying unaudited Condensed Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and notes thereto included in the Company’s 2023 Form 10-K. The Condensed Consolidated Balance Sheet as of September 30, 2023 was derived from the audited financial statements at that date. There have been no material changes in the Company’s significant accounting policies from those that were disclosed in the 2023 Form 10-K, except as noted below. Certain reclassifications have been made to prior year financial statements to conform to classifications used in the current year. These reclassifications had no impact on net income, stockholder’s equity or cash flows as previously reported. Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses during the reporting period. Significant estimates include revenue recognition, reserves for excess inventory, inventory obsolescence, inventory valuation, product warranties, customer rebates, stock-based compensation, litigation, income taxes, contingent consideration, goodwill and intangible asset valuation and accounting for long-lived assets. Management’s estimates and assumptions are evaluated on an ongoing basis and are based on historical experience, current conditions and available information. Actual results may differ from estimated amounts. Estimates are revised as additional information becomes available. Accounting Policies Refer to the Company’s 2023 Form 10-K for a discussion of the Company’s accounting policies, as updated below and for recently adopted accounting standards. Research and Development Costs Research and development costs primarily relate to new product development, product claims support and manufacturing process improvements. Such costs are expensed as incurred and are included in “Selling, general and administrative expenses” within the Condensed Consolidated Statements of Comprehensive Income (Loss). Total research and development expenses were $ 3.1 million and $ 2.1 million , respectively, for the three months ended December 31, 2023 and 2022 . Recently Adopted Accounting Pronouncements None. Recently Issued Accounting Pronouncements In November 2023, the Financial Accounting Standards Board ("FASB") issued ASU 2023-07, Segment Reporting (Topic 280) : Improvements to Reportable Segment Disclosures . This standard requires all public entities that are subject to segment reporting requirements to disclose additional information, including significant segment expenses and other segment items on an annual and interim basis. It also requires the disclosure of the title and the position of the chief operating decision maker and how the reported measures are used for making business decisions. This standard is effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. The Company intends to adopt the updated standard during the fiscal year beginning October 1, 2024. The Company is currently evaluating the impact the adoption of this standard will have on its disclosures. In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures . This standard expands the disclosure requirements primarily on the rate reconciliation and income tax paid. For public entities, this standard is effective for annual reporting periods beginning after December 15, 2024, with early adoption permitted. The Company intends to adopt the updated standard during the fiscal year beginning October 1, 2025. The Company is currently evaluating the impact the adoption of this standard will have on its disclosures.

Revenue

Revenue	3 Months Ended
	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Revenue	2. REVENUE The Company recognizes revenues when control of the promised goods is transferred to the Company’s customers in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods, at a point in time, when shipping occurs. The Company also engages in customer rebates, which are recorded in “Net sales” in the Condensed Consolidated Statements of Comprehensive Income (Loss) and in “Accrued rebates” and “Trade receivables” in the Condensed Consolidated Balance Sheets. The Company recorded accrued rebates of $ 67.9 million and $ 54.6 million as of December 31, 2023 and 2022, respectively, and contra trade receivables of $ 4.5 million and $ 6.5 million as of December 31, 2023 and 2022 , respectively. The rebate activity was as follows (in thousands): Three Months Ended December 31, 2023 2022 Beginning balance $ 66,958 $ 56,542 Rebate expense 22,239 15,716 Rebate payments ( 16,804 ) ( 11,192 ) Ending balance $ 72,393 $ 61,066 The Company records deferred revenue when cash payments are received or due in advance of the Company’s performance.

Divestiture

Divestiture	3 Months Ended
	Dec. 31, 2023
Business Combinations [Abstract]
Divestiture	3. DIVESTITURE On November 1, 2023 , the Company completed the sale of its Vycom business within the Commercial segment for net proceeds of approximately $ 133.1 million. The divestiture allows the Company to focus on the highest value portions of its business and provides additional cash to finance its capital allocation priorities. The gain on sale of $ 38.5 million was recognized in "Gain on sale of business" within the Condensed Consolidated Statements of Comprehensive Income (Loss) for the three months ended December 31, 2023. The Company did not report the sale in discontinued operations as it was not a strategic shift that would have a major effect on the Company's operations and financial results. See Note 12 for more information on the Commercial segment.

Inventories

Inventories	3 Months Ended
	Dec. 31, 2023
Inventory Disclosure [Abstract]
Inventories	4. INVENTORIES Inventories are valued at the lower of cost or net realizable value, and are reduced for slow-moving and obsolete inventory. The inventories cost is recorded at standard cost, which approximates actual cost, on a first-in first-out (“FIFO”) basis. Inventories consisted of the following (in thousands): in thousands December 31, September 30, Raw materials $ 60,918 $ 67,330 Work in process 31,742 37,038 Finished goods 168,902 116,733 Total inventories $ 261,562 $ 221,101

Property, Plant and Equipment -

Property, Plant and Equipment - Net	3 Months Ended
	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment - Net	5. PROPERTY, PLANT AND EQUIPMENT—NET Property, plant and equipment – net consisted of the following (in thousands): December 31, September 30, Land $ 3,209 $ 4,829 Buildings and improvements 103,824 129,031 Manufacturing equipment 595,551 624,754 Computer equipment 32,561 32,300 Furniture and fixtures 6,614 7,290 Vehicles 1,163 1,105 Total property and equipment 742,922 799,309 Construction in progress 79,314 94,422 822,236 893,731 Accumulated depreciation ( 365,732 ) ( 392,708 ) Total property and equipment – net $ 456,504 $ 501,023 Depreciation expense was approximately $ 20.5 million and $ 20.8 million in the three months ended December 31, 2023 and 2022, respectively. During the three months ended December 31, 2023 and 2022, $ 1.1 million and $ 1.3 million of interest was capitalized, respectively.

Goodwill and Intangible Assets

Goodwill and Intangible Assets - Net	3 Months Ended
	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets - Net	6. GOODWILL AND INTANGIBLE ASSETS—NET Goodwill Goodwill consisted of the following (in thousands): Residential Commercial Total Goodwill before impairment as of September 30, 2023 $ 953,882 $ 72,589 $ 1,026,471 Accumulated impairment losses as of September 30, 2023 — ( 32,200 ) ( 32,200 ) Goodwill, net as of September 30, 2023 $ 953,882 $ 40,389 $ 994,271 Divestiture Goodwill disposal before impairment — ( 58,655 ) ( 58,655 ) Accumulated impairment losses — 32,200 32,200 Goodwill, net disposal — ( 26,455 ) ( 26,455 ) Goodwill before impairment as of December 31, 2023 $ 953,882 $ 13,934 $ 967,816 Accumulated impairment losses as of December 31, 2023 — — — Goodwill, net as of December 31, 2023 $ 953,882 $ 13,934 $ 967,816 Intangible assets, net The Company did no t have any indefinite lived intangible assets other than goodwill as of December 31, 2023 and September 30, 2023 . Finite-lived intangible assets consisted of the following (in thousands): December 31, 2023 Lives in Gross Accumulated Net Proprietary knowledge 10 — 15 $ 300,400 $ ( 257,358 ) $ 43,042 Trademarks 5 — 20 217,640 ( 158,382 ) 59,258 Customer relationships 12 — 19 156,452 ( 77,558 ) 78,894 Patents 9 — 10 8,500 ( 6,138 ) 2,362 Other intangibles 3 — 15 4,076 ( 4,028 ) 48 Total intangible assets $ 687,068 $ ( 503,464 ) $ 183,604 September 30, 2023 Lives in Gross Accumulated Net Propriety knowledge 10 — 15 $ 300,400 $ ( 253,608 ) $ 46,792 Trademarks 5 — 20 230,240 ( 164,759 ) 65,481 Customer relationships 12 — 19 176,852 ( 92,268 ) 84,584 Patents 9 — 10 8,500 ( 5,913 ) 2,587 Other intangible assets 3 — 15 4,076 ( 4,023 ) 53 Total intangible assets $ 720,068 $ ( 520,571 ) $ 199,497 Amortization expense was $ 10.2 million and $ 11.8 million in the three months ended December 31, 2023 and 2022, respectively. As of December 31, 2023, the remaining weighted-average amortization period for acquired intangible assets was 11.1 years.

Composition of Certain Balance

Composition of Certain Balance Sheet Accounts	3 Months Ended
	Dec. 31, 2023
Composition Of Certain Balance Sheet Accounts Disclosure [Abstract]
Composition of Certain Balance Sheet Accounts	7. COMPOSITION OF CERTAIN BALANCE SHEET ACCOUNTS Allowance for Doubtful Accounts Allowance for doubtful accounts consisted of the following (in thousands): Three Months Ended December 31, 2023 2022 Beginning balance $ 1,773 $ 1,397 Provision ( 433 ) 277 Divestiture ( 32 ) — Ending balance $ 1,308 $ 1,674 Accrued Expenses and Other Liabilities Accrued expenses consisted of the following (in thousands): December 31, 2023 September 30, 2023 Taxes $ 28,168 $ 6,959 Employee related liabilities 20,673 34,313 Marketing 4,799 3,868 Lease liability - operating 4,559 4,180 Customer deposits 3,771 4,152 Warranty 2,927 2,739 Lease liability - finance 2,829 2,777 Freight 1,833 1,242 Utilities 1,802 2,141 Professional fees 1,706 2,073 Construction in progress 1,530 2,863 Commissions 873 991 Other 5,529 3,696 Total accrued expenses and other current liabilities $ 80,999 $ 71,994

Debt

Debt	3 Months Ended
	Dec. 31, 2023
Debt Disclosure [Abstract]
Debt	8. DEBT Debt consisted of the following (in thousands): December 31, 2023 September 30, 2023 Term Loan due April 28, 2029 — SOFR + 2.50 % + 0.1 % ( 7.96 % at December 31, 2023 and 7.92 % at September 30, 2023) $ 592,500 $ 594,000 Revolving Credit Facility through March 31, 2026 - SOFR + 0.1 % — — Total 592,500 594,000 Less unamortized deferred financing costs ( 3,818 ) ( 3,996 ) Less unamortized original issue discount ( 3,571 ) ( 3,739 ) Less current portion ( 6,000 ) ( 6,000 ) Long-term debt—less current portion and unamortized $ 579,111 $ 580,265 Term Loan Agreement The Term Loan Agreement is a first lien term loan and will mature on April 28, 2029 , subject to acceleration or prepayment. The Term Loan Agreement will amortize in equal quarterly installments of 0.25 % of the aggregate principal amount of the loans outstanding, subject to reduction for certain prepayments. The loans thereunder bear an interest rate equal to (i) in the case of alternative base rate, or ABR, borrowings, the highest of (a) the Federal Funds Rate plus 0.50 %, (b) the Prime Rate as in effect on such day and (c) the one-month Term Secured Overnight Financing Rate ("SOFR") plus 1.00 % per annum, provided that in no event will the alternative base rate be less than 1.50 % per annum, plus an applicable margin of 1.50 % and (ii) in the case of SOFR borrowings, the Term SOFR rate for the applicable interest period, in each case, plus an applicable margin of 2.50 %. As of December 31, 2023 and September 30, 2023 , The AZEK Group LLC had $ 592.5 million and $ 594.0 million outstanding under the Term Loan Agreement. The obligations under the Term Loan Agreement are secured by a first priority security interest in the membership interests of The AZEK Group LLC owned by the Company, the equity interests of The AZEK Group LLC’s domestic subsidiaries, other than certain immaterial subsidiaries and other excluded subsidiaries, and all remaining assets not constituting Revolver Priority Collateral (as defined below and subject to certain exceptions) of the Company, The AZEK Group LLC and the subsidiaries of The AZEK Group LLC that are guarantors under the Term Loan Agreement (the “Term Loan Priority Collateral”), and a second priority security interest in the Revolver Priority Collateral. The obligations under the Term Loan Agreement are guaranteed by the Company and the wholly owned domestic subsidiaries of The AZEK Group LLC other than certain immaterial subsidiaries and other excluded subsidiaries. Loans under the Term Loan Agreement may be voluntarily prepaid in whole, or in part, in each case without premium or penalty, subject to certain customary conditions. The Term Loan Agreement also requires mandatory prepayments of loans under the Term Loan Agreement from the proceeds of certain debt issuances and certain asset dispositions (subject to certain reinvestment rights) and, commencing with the fiscal year ending September 30, 2023, a percentage of excess cash flow (subject to step-downs upon The AZEK Group LLC achieving certain leverage ratios and other reductions in connection with other debt prepayments). The Term Loan Agreement contains affirmative covenants, negative covenants and events of default, which are broadly consistent with those in the Revolving Credit Facility (with certain differences consistent with the differences between a revolving loan and term loan) and that are customary for facilities of this type. The Term Loan Agreement does not have any financial maintenance covenants. The Term Loan Agreement also includes customary events of default, including the occurrence of a change of control. As of December 31, 2023 and September 30, 2023 , unamortized deferred financing fees related to the Term Loan Agreement were $ 3.8 million and $ 4.0 million, respectively. Revolving Credit Facility The AZEK Group LLC has also entered into a revolving credit facility, as amended and restated from time to time (the “Revolving Credit Facility”), with certain of our direct and indirect subsidiaries and certain lenders party thereto. The Revolving Credit Facility provides for maximum aggregate borrowings of up to $ 150.0 million, subject to an asset-based borrowing base. The borrowing base is limited to a set percentage of eligible accounts receivable and inventory, less reserves that may be established by the administrative agent and the collateral agent in the exercise of their reasonable credit judgment. The AZEK Group LLC had no outstanding borrowings under the Revolving Credit Facility as of December 31, 2023 and September 30, 2023 , respectively. In addition, The AZEK Group LLC had $ 2.2 million and $ 2.8 million of outstanding letters of credit held against the Revolving Credit Facility as of December 31, 2023 and September 30, 2023 , respectively. The AZEK Group LLC had approximately $ 147.8 million available under the borrowing base for future borrowings as of December 31, 2023 . The AZEK Group LLC also has the option to increase the commitments under the Revolving Credit Facility by up to $ 100.0 million, subject to certain conditions. On January 26, 2023, The AZEK Group LLC amended the Revolving Credit Facility, replacing all LIBOR-based provisions with provisions reflecting SOFR, including, without limitation, the use of a new Adjusted Term SOFR benchmark rate equal to Term SOFR (as defined in the Revolving Credit Agreement) plus 0.10 %. As of December 31, 2023 , outstanding revolving loans under the Revolving Credit Facility bore interest at a rate which equaled, at the Company's option, either (i) for ABR borrowings, the highest of (a) the Federal Funds Rate plus 50 basis points , (b) the prime rate and (c) the Adjusted Term SOFR as of such date for a deposit in U.S. dollars with a maturity of one month plus 100 basis points, plus, in each case, a spread of 25 to 75 basis points , based on average historical availability , or (ii) for SOFR borrowings, the Adjusted Term SOFR plus a spread of 125 to 175 basis points , based on average historical availability . The maturity date for the Revolving Credit Facility is the earlier of March 31, 2026 and the date that is 91 days prior to the maturity of the Term Loan Agreement or any permitted refinancing thereof. Deferred financing costs, net of accumulated amortization, related to the Revolving Credit Facility at December 31, 2023 and September 30, 2023 were $ 0.6 million and $ 0.7 million, respectively. A “commitment fee” accrues on any unused portion of the commitments under the Revolving Credit Facility during the preceding three calendar month period. If the average daily used percentage is greater than 50%, the commitment fee equals 25 basis points, and if the average daily used percentage is less than or equal to 50%, the commitment fee equals 37.5 basis points. The commitment fees were $ 0.1 million and $ 0.1 million for the three months ended December 31, 2023 and 2022, respectively. The obligations under the Revolving Credit Facility are guaranteed by the Company and its wholly owned domestic subsidiaries other than certain immaterial subsidiaries and other excluded subsidiaries. The obligations under the Revolving Credit Facility are secured by a first priority security interest in substantially all of the accounts receivable, inventory, deposit accounts, securities accounts and cash assets of the Company, The AZEK Group LLC and the subsidiaries of The AZEK Group LLC that are guarantors under the Revolving Credit Facility, and the proceeds thereof (subject to certain exceptions) (the “Revolver Priority Collateral”), plus a second priority security interest in all of the Term Loan Priority Collateral. The Revolving Credit Facility may be voluntarily prepaid in whole, or in part, in each case without premium or penalty. The AZEK Group LLC is also required to make mandatory prepayments (i) when aggregate borrowings exceed commitments or the applicable borrowing base and (ii) during “cash dominion,” which occurs if (a) the availability under the Revolving Credit Facility is less than the greater of (i) $12.5 million and (ii) 10% of the lesser of (x) $150.0 million and (y) the borrowing base, for five consecutive business days or (b) certain events of default have occurred and are continuing. The Revolving Credit Facility contains affirmative covenants that are customary for financings of this type, including allowing the Revolver Administrative Agent to perform periodic field exams and appraisals to evaluate the borrowing base. The Revolving Credit Facility contains various negative covenants, including limitations on, subject to certain exceptions, the incurrence of indebtedness, the incurrence of liens, dispositions, investments, acquisitions, restricted payments, transactions with affiliates, as well as other negative covenants customary for financings of this type. The Revolving Credit Facility also includes a financial maintenance covenant, applicable only when the excess availability is less than the greater of (i) 10% of the lesser of the aggregate commitments under the Revolving Credit Facility and the borrowing base, and (ii) $12.5 million. In such circumstances, The AZEK Group LLC would be required to maintain a minimum fixed charge coverage ratio (as defined in the Revolving Credit Facility) for the trailing four quarters equal to at least 1.0 to 1.0 ; subject to The AZEK Group LLC’s ability to make an equity cure (no more than twice in any four quarter period and up to five times over the life of the facility). As of December 31, 2023, The AZEK Group LLC was in compliance with the financial and nonfinancial covenants imposed by the Revolving Credit Facility. The Revolving Credit Facility also includes customary events of default, including the occurrence of a change of control. Interest expense consisted of the following (in thousands): Three Months Ended December 31, 2023 2022 Interest expense: Term Loan Agreement $ 11,358 $ 8,916 Revolving Credit Facility 150 151 Other 1,123 1,109 Amortization - Deferred financing costs Term Loan Agreement 179 179 Revolving Credit Facility 66 66 Amortization - Original issue discount Term Loan Agreement 167 167 Capitalized interest ( 1,079 ) ( 1,289 ) Interest expense 11,964 9,299 Interest income ( 4,054 ) — Interest expense, net $ 7,910 $ 9,299 See Note 11 for the fair value of the Company’s debt as of December 31, 2023 and September 30, 2023 .

Product Warranties

Product Warranties	3 Months Ended
	Dec. 31, 2023
Product Warranties Disclosures [Abstract]
Product Warranties	9. PRODUCT WARRANTIES The Company provides product assurance warranties of various lengths ranging from 5 years to lifetime for limited coverage for a variety of material and workmanship defects based on standard terms and conditions between the Company and its customers. Warranty coverage depends on the product involved. The warranty reserve activity consisted of the following (in thousands): Three Months Ended December 31, 2023 2022 Beginning balance $ 16,195 $ 15,023 Adjustments to reserve ( 542 ) ( 172 ) Warranty claims payment ( 624 ) ( 313 ) Ending balance 15,029 14,538 Current portion of accrued warranty ( 2,927 ) ( 2,492 ) Accrued warranty – less current portion $ 12,102 $ 12,046

Leases

Leases	3 Months Ended
	Dec. 31, 2023
Leases [Abstract]
Leases	10. LEASES The Company leases vehicles, machinery, manufacturing facilities, office space, land, and equipment under both operating and finance leases. The Company determines if an arrangement is a lease at inception. A contract is or contains a lease if the contract conveys the right to control the use of an identified asset for a period of time in exchange for consideration. As of December 31, 2023 and September 30, 2023, amounts associated with leases are included in Other assets, Accrued expense and other liabilities and Other non-current liabilities in the Company’s Condensed Consolidated Balance Sheet. For leases with initial terms greater than 12 months, the Company considers these right-of-use, or ROU, assets and records the related asset and obligation at the present value of lease payments over the term. For leases with initial terms equal to or less than 12 months, the Company does not consider them as right-of-use assets and instead considers them short-term lease costs that are recognized on a straight-line basis over the lease term. The Company’s leases may include escalation clauses, renewal options and/or termination options that are factored into the determination of lease term and lease payments when it is reasonably certain the option will be exercised. Renewal options range from 1 year to 20 years. Lease assets and lease liabilities as of December 31, 2023 and September 30, 2023 were as follows (in thousands): Leases Classification on Balance Sheet December 31, 2023 September 30, 2023 Assets ROU operating lease assets Other assets $ 16,068 $ 15,423 ROU finance lease assets Other assets 70,554 71,529 Total lease assets $ 86,622 $ 86,952 Liabilities Current Operating Accrued expenses and other liabilities $ 4,559 $ 4,180 Finance Accrued expenses and other liabilities 2,829 2,777 Non-Current Operating Other non-current liabilities 13,916 13,699 Finance Other non-current liabilities 75,276 75,718 Total lease liabilities $ 96,580 $ 96,374 The components of lease expense for the three months ended December 31, 2023 and 2022 were as follows: Three Months Ended December 31, (in thousands) 2023 2022 Operating lease expense $ 1,478 $ 1,501 Finance lease amortization of assets 1,301 1,248 Finance lease interest on lease liabilities 1,107 1,092 Short term 86 103 Sublease income ( 28 ) ( 71 ) Total lease expense $ 3,944 $ 3,873 The tables below present supplemental information related to leases as of December 31, 2023 and September 30, 2023: Weighted-average remaining lease term (years) December 31, 2023 September 30, 2023 Operating leases 6.4 6.8 Finance leases 25.3 25.4 Weighted-average discount rate Operating leases 4.7 % 4.4 % Finance leases 5.8 % 5.8 % The following table summarizes the maturities of lease liabilities at December 31, 2023: (in thousands) Operating Leases Finance Leases Total 2024 $ 4,045 $ 5,358 $ 9,403 2025 4,719 7,105 11,824 2026 2,844 6,942 9,786 2027 2,105 6,480 8,585 2028 1,841 5,278 7,119 Thereafter 6,071 117,012 123,083 Total lease payments 21,625 148,175 169,800 Less: interest ( 3,150 ) ( 70,070 ) ( 73,220 ) Present value of lease liability $ 18,475 $ 78,105 $ 96,580

Fair Value of Financial Instrum

Fair Value of Financial Instruments	3 Months Ended
	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	11. FAIR VALUE OF FINANCIAL INSTRUMENTS FASB Accounting Standards Codification (“ASC”) requirements for Fair Value Measurements and Disclosures establish a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three levels. Level 1 inputs, the highest priority, are quoted prices in active markets for identical assets or liabilities. Level 2 inputs reflect other than quoted prices included in Level 1 that are either observable directly or through corroboration with observable market data. Level 3 inputs are unobservable inputs, due to little or no market activity for the asset or liability, such as internally-developed valuation models. We do not have any assets or liabilities measured at fair value on a recurring basis that are Level 3. Derivative Instruments The Company’s objective in using interest rate derivative instruments is to hedge against interest rate volatility associated with its senior secured credit facilities by converting a portion of its floating rate debt to fixed rate debt. In November 2022, the Company entered into two interest rate swap agreements with Barclays Bank PLC to manage interest rate risk related to Term Loan. Each agreement has a notional amount of $ 150 million and will expire on October 31, 2025 . One agreement swaps variable interest at a rate based on SOFR with a fixed rate of 4.39 % and the second with a fixed rate of 4.48 %. At the inceptions of the swap agreements and as of December 31, 2023, both swaps were designated and qualified as cash flow hedges in accordance with ASC 815. The gain (loss) is recorded in Accumulated other comprehensive income (loss) and then reclassified into Interest expense in the same period in which the hedged transaction affects earnings. As of December 31, 2023 , the Company expects to reclass approximately $ 0.6 million ($ 0.4 million after-tax) as a reduction to interest expense in the next 12 months. The following table provides the fair values of the interest rate derivative instruments as well as their classification on the Balance Sheet as of December 31, 2023 and September 30, 2023 (in thousands): Fair Value as of Fair Value Hierarchy Balance Sheet Location December 31, 2023 September 30, 2023 Assets Interest rate swaps Level 2 Other current assets $ 677 $ 2,558 Liabilities Interest rate swaps Level 2 Other non-current liabilities $ 2,300 $ 65 The Company estimates the fair value of interest rate swaps using a valuation model based on observable market data, such as yield curves. Both swaps are classified as Level 2 measurement in the fair value hierarchy. The following table summarizes the effects of the interest rate derivative instruments on Accumulated other comprehensive income (loss) for the three months ended December 31, 2023 and 2022 (in thousands): Before-tax Amount Income Tax Expense Net of Tax Amount Balance - September 30, 2023 $ 2,493 $ 615 $ 1,878 Amount of loss recognized in other comprehensive income (loss) ( 3,437 ) ( 840 ) ( 2,596 ) Amount of gain reclassified from accumulated other comprehensive income (loss) into net income (loss) ( 678 ) ( 180 ) ( 499 ) Balance - December 31, 2023 $ ( 1,622 ) $ ( 405 ) $ ( 1,217 ) Before-tax Amount Income Tax Expense Net of Tax Amount Balance - September 30, 2022 $ — $ — $ — Amount of loss recognized in other comprehensive income (loss) ( 2,544 ) ( 674 ) ( 1,870 ) Amount of loss reclassified from accumulated other comprehensive income (loss) into net income (loss) 101 27 74 Balance - December 31, 2022 $ ( 2,443 ) $ ( 647 ) $ ( 1,796 ) Other Financial Instruments The carrying values and the estimated fair values of the debt financial instruments (Level 2 measurements) consisted of the following (in thousands): December 31, 2023 September 30, 2023 Carrying Estimated Carrying Estimated Term Loan due April 28, 2029 $ 592,500 $ 596,944 $ 594,000 $ 595,485 Financial instruments remeasure at fair value on a recurring basis – During the year ended September 30, 2022, the Company entered into an arrangement for a contingent payment to the former owner and employee of StruXure. The contingent payment is based on achievement of a minimum EBITDA amount and a multiple of EBITDA, for EBITDA exceeding a higher threshold for calendar year 2022. Based on the formula, the potential contingent payout can range from zero to $ 13.9 million. At the date of acquisition, the fair value was estimated to be $ 9.5 million. As of March 31, 2023, the fair value was increased to $ 12.7 million based on the actual EBITDA amount for StruXure. Compensation expense of $ 9.5 million was recognized for the year ended September 30, 2022 and $ 3.2 million was recognized for the year ended September 30, 2023. The Company paid $ 12.7 million as settlement of the contingent liability in April, 2023. In connection with the acquisition of INTEX on August 1, 2022 , the Company entered into a contingent consideration arrangement with the former owner of INTEX. The contingent consideration is based on achievement of a minimum gross profit amount for calendar year 2022. Based on the formula, the potential contingent consideration can range from zero to $ 6.2 million. At the date of the acquisition, the fair value was estimated to be $ 5.8 million. As of December 31, 2022, the fair value was increased to $ 6.2 million. Contingent payment of $ 5.8 million was included in the acquisition purchase price at the date of acquisition and the change in fair value of $ 0.4 million was recognized in selling, general and administrative expense for the year ended September 30, 2023. The Company paid $ 6.2 million as settlement of this contingent liability in fiscal year 2023.

Segments

Segments	3 Months Ended
	Dec. 31, 2023
Segment Reporting [Abstract]
Segments	12. SEGMENTS Operating segments for the Company are determined based on information used by the chief operating decision maker (“CODM”) in deciding how to evaluate performance and allocate resources to each of the segments. The CODM reviews Adjusted EBITDA and Adjusted EBITDA Margin as the key segment measures of performance. Adjusted EBITDA is defined as segment operating income (loss) plus depreciation and amortization, adjusted by adding thereto or subtracting therefrom stock-based compensation costs, business transformation costs, acquisition costs, capital structure transaction costs, and certain other costs. Adjusted EBITDA Margin is defined as Adjusted EBITDA divided by net sales. The Company has two reportable segments, Residential and Commercial. The reportable segments were determined primarily based on products and end markets as follows: • Residential—The Residential segment manufactures and distributes decking, rail, pergolas, outdoor structures, exterior trim, siding and accessories through a national network of dealers and distributors and multiple home improvement retailers providing extensive geographic coverage and enabling the Company to effectively serve contractors. Regional recyclers provides full-service recycled PVC material processing, sourcing, logistical support, and scrap management programs that are utilized in our finished goods manufacturing processes. This segment is impacted by trends in and the strength of home repair and remodel activity. • Commercial—The Commercial segment manufactures, fabricates and distributes lockers and bathroom partitions. This segment is impacted by trends in and the strength of the repair and remodel sector. This segment also previously included the Company’s Vycom business, which manufactured resin-based extruded sheeting products for a variety of commercial and industrial applications. The Company sold the Vycom business on November 1, 2023. See Note 3 for additional information on the divestiture. The segment data below includes data for Residential and Commercial for the three months ended December 31, 2023 and 2022 (in thousands). Three Months Ended 2023 2022 Net sales to customers Residential $ 223,000 $ 179,484 Commercial 17,444 36,775 Total $ 240,444 $ 216,259 Adjusted EBITDA Residential (1) $ 52,762 $ 9,946 Commercial 2,905 5,154 Total Adjusted EBITDA for reporting segments $ 55,667 $ 15,100 Adjustments to Income before income tax provision Depreciation and amortization ( 31,937 ) ( 33,840 ) Stock-based compensation costs ( 8,468 ) ( 3,957 ) Acquisition and divestiture costs (2) ( 492 ) ( 2,954 ) Gain on sale of business (3) 38,515 — Other costs (4) ( 2,768 ) ( 214 ) Interest expense, net ( 7,910 ) ( 9,299 ) Income (loss) before income tax provision $ 42,607 $ ( 35,164 ) (1) Effective as of December 31, 2023, Residential segment Adjusted EBITDA includes all corporate expenses, such as selling, general and administrative costs related to our corporate offices, including payroll and other professional fees. The prior period has been recast to reflect the change. (2) Acquisition and divestiture costs reflect costs related to divestiture of $ 0.5 million for both the three months ended December 31, 2023 and 2022, respectively, and costs directly related to completed acquisitions of $ 2.4 million in the three months ended December 31, 2022. (3) Gain on sale of business relates to the sale of the Vycom business. (4) Other costs reflect costs related to the removal of dispensable equipment resulting from a modification of our manufacturing process of $ 2.4 million in the three months ended December 31, 2023, reduction in workforce costs of $ 0.3 million in the three months ended December 31, 2023, and costs for legal expenses of $ 0.1 million and $ 0.2 million in the three months ended December 31, 2023 and 2022, respectively.

Capital Stock

Capital Stock	3 Months Ended
	Dec. 31, 2023
Stockholders' Equity Note [Abstract]
Capital Stock	13. CAPITAL STOCK Share Repurchase Program On May 5, 2022, the Board of Directors authorized the Company to repurchase up to $ 400 million of the Company’s Class A common stock (the “Share Repurchase Program”). The Share Repurchase Program allows the Company to repurchase its shares opportunistically from time to time. Purchases may be effected through one or more open market transactions, privately negotiated transactions, transactions structured through investment banking institutions, accelerated share repurchases or tender offers, some of which may be effected through Rule 10b5-1 plans, or a combination of the foregoing. The timing of repurchases will depend upon several factors, including market and business conditions, and repurchases may be discontinued at any time. On December 4, 2023, the Company entered into a $ 100 million accelerated share repurchase agreement, or the “ASR” with Goldman Sachs & Co. LLC, or “Goldman Sachs”. Goldman Sachs delivered 2,291,607 initial shares to the Company on December 6, 2023, based on the closing price of the Company’s Class A common stock of $ 34.91 on December 4, 2023. The total value of the initial shares represents 80 % of the $ 100 million ASR. The final settlement will be based on the volume-weighted average price of the Company's Class A common stock over the repurchase period, subject to certain adjustments. The Company expects to settle the ASR in the second quarter of fiscal year 2024. During the three months ended December 31, 2022, the Company repurchased 352,760 shares of its Class A common stock on the open market at an average price of $ 21.23 per share, totaling an approximately $ 7.5 million reacquisition cost. On August 16, 2022, the U.S. government enacted the Inflation Reduction Act of 2022 (the “Inflation Reduction Act”), that includes, among other provisions, a one percent excise tax on net repurchases of stock after December 31, 2022. For the three months ended December 31, 2023, the Company recognized $ 0.8 million excise tax as reacquisition cost of share repurchases. As of December 31, 2023 , the Company had approximately $ 101.1 million available for repurchases under the Share Repurchase Program.

Stock-Based Compensation

Stock-Based Compensation	3 Months Ended
	Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]
Stock-Based Compensation	14. STOCK-BASED COMPENSATION The Company grants stock-based awards to attract, retain and motivate key employees and directors. The 2020 Omnibus Incentive Compensation Plan (“2020 Plan”), provides for the grant of stock options, stock appreciation rights, restricted stock, restricted stock units, dividend equivalent rights, and performance-based or other equity-related awards to the Company’s employees and directors. The maximum aggregate number of shares that may be issued under the 2020 Plan is 15,852,319 shares with 2,219,224 shares remaining in the reserve. The total aggregate number of shares may be adjusted as determined by the Board of Directors. On December 11, 2023, the Compensation Committee of the Board of Directors authorized certain changes to a former employee’s stock-based awards which were effective in connection with his retirement. These changes allow certain awards to continue to vest in due course following retirement and extend the exercisability of certain outstanding and exercisable stock options to the end of the contractual term of the options. This resulted in a Type III Modification (improbable to probable) as defined in accounting guidance, accounted for as a cancellation of the original award and an issuance of a new grant, as well as, a Type I Modification (probable to probable), accounted for as an exchange of the original award for a new grant under the revised terms. The modifications resulted in $ 1.9 million of stock-based compensation expense in the three months ended December 31, 2023. Stock-based compensation expense for the three months ended December 31, 2023 and 2022 was $ 8.5 million and $ 4.0 million , respectively, recognized in “Selling, general and administrative expenses” in the Condensed Consolidated Statements of Comprehensive Income (Loss). Total income tax benefit for the three months ended December 31, 2023 and 2022 was $ 1.7 million and $ 0.8 million, respectively. As of December 31, 2023 , the Company had not yet recognized compensation cost on unvested stock-based awards of $ 36.6 million, with a weighted average remaining recognition period of 2.0 years. The Company uses the Black Scholes pricing model to estimate the fair value of its service-based awards as of the grant date. Under the terms of the 2020 Plan, all stock options will expire if not exercised within ten years of the grant date. The following table sets forth the significant assumptions used for the calculation of stock-based compensation expense for the three months ended December 31, 2023 and 2022: December 15, December 12, Risk-free interest rate 3.93 % 3.77 % Expected volatility 40.00 % 40.00 % Expected term (in years) 6.00 6.00 Expected dividend yield 0.00 % 0.00 % Stock Options The following table summarizes the performance-based stock option activity for the three months ended December 31, 2023: Number Weighted Weighted Aggregate (in years) (in thousands) Outstanding at October 1, 2023 1,114,261 $ 23.00 Granted — — Exercised ( 60,261 ) 23.00 Cancelled/Forfeited — — Outstanding at December 31, 2023 1,054,000 23.00 6.4 16,074 Vested and exercisable at December 31, 2023 1,054,000 $ 23.00 6.4 16,074 The following table summarizes the service-based stock option activity for the three months ended December 31, 2023: Number Weighted Weighted Aggregate (in years) (in thousands) Outstanding at October 1, 2023 3,361,707 $ 25.43 Granted 138,731 38.15 Exercised ( 76,624 ) 24.17 Cancelled/Forfeited — — Outstanding at December 31, 2023 3,423,814 25.97 7.0 43,493 Vested and exercisable at December 31, 2023 2,475,222 $ 24.78 6.7 33,921 Restricted Stock Awards A summary of the service-based restricted stock awards activity during the three months ended December 31, 2023 was as follows: Number Weighted Outstanding and unvested at October 1, 2023 82,481 $ 23.00 Granted — — Vested ( 6,845 ) 23.00 Forfeited — — Outstanding and unvested at December 31, 2023 75,636 $ 23.00 Performance Restricted Stock Units Performance restricted stock units were granted to officers and certain employees of the Company and represent the right to earn shares of Company common stock based on the achievement of company-wide non-GAAP performance conditions, including cumulative net sales, average return on net tangible assets and cumulative EBITDA during the three-year performance period. Compensation cost is amortized into expense over the performance period, which is generally three years, and is based on the probability of meeting performance targets. The fair value of each performance share award is based on the closing stock price on the date of grant. A summary of the performance-based restricted stock unit awards activity for the three months ended December 31, 2023 presented at target was as follows: Number Weighted Outstanding and unvested at October 1, 2023 508,622 $ 26.72 Granted 215,462 38.15 Vested ( 123,821 ) 34.82 Forfeited ( 3,308 ) 28.01 Outstanding and unvested at December 31, 2023 596,955 $ 28.91 Restricted Stock Units A summary of the service-based restricted stock unit awards activity for the three months ended December 31, 2023 was as follows: Number Weighted Outstanding and unvested at October 1, 2023 786,096 $ 25.42 Granted 204,796 38.12 Vested ( 224,591 ) 28.14 Forfeited ( 2,102 ) 24.85 Outstanding and unvested at December 31, 2023 764,199 $ 28.01

Earnings Per Share

Earnings Per Share	3 Months Ended
	Dec. 31, 2023
Earnings Per Share [Abstract]
Earnings Per Share	15. EARNINGS PER SHARE The Company computes earnings per common share (“EPS”) under the two-class method which requires the allocation of all distributed and undistributed earnings attributable to the Company to common stock and other participating securities based on their respective rights to receive distributions of earnings or losses. The Company’s Class A common stock and Class B common stock equally share in distributed and undistributed earnings, and, therefore, no allocation to participating securities or dilutive securities is performed. Basic EPS attributable to common stockholders is calculated by dividing net income (loss) attributable to common stockholders by the weighted-average number of shares of common stock outstanding. Diluted EPS is calculated by adjusting weighted average shares outstanding for the dilutive effect of potential common shares, determined using the treasury-stock method. For purposes of the diluted EPS calculation, restricted stock awards, restricted stock units and options to purchase shares of common stock are considered to be potential common shares. The following table sets forth the computation of the Company’s basic and diluted EPS attributable to common stockholders (in thousands, except share and per share amounts): Three Months Ended December 31, 2023 2022 Numerator: Net income (loss) $ 25,719 $ ( 25,836 ) Net income (loss) attributable to $ 25,719 $ ( 25,836 ) Denominator: Weighted-average shares of common stock Basic 147,297,662 150,877,635 Diluted 148,876,282 150,877,635 Net income (loss) per share attributable Net income (loss) per common share - basic $ 0.17 $ ( 0.17 ) Net income (loss) per common share - diluted $ 0.17 $ ( 0.17 ) The following table includes the number of shares that may be dilutive common shares in the future, and were not included in the computation of diluted net income per share because the effect was anti-dilutive: Three Months Ended December 31, 2023 2022 Stock Options 547,890 5,010,161 Restricted Stock Units 108,736 531,462

Income Taxes

Income Taxes	3 Months Ended
	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Income Taxes	16. INCOME TAXES The Company calculates the interim tax provision in accordance with the provisions of ASC 740-270, Income Taxes; Interim Reporting , specifically ASC-740-270-25-2. For interim periods, the Company estimates the annual effective income tax rate and applies the estimated rate to the year-to-date income or loss before income taxes. The effective income tax rates for the three months ended December 31, 2023 and 2022 were 39.6 % and 26.5 % , respectively. The increase in the effective income tax rate for the three months ended December 31, 2023, as compared to the three months ended December 31, 2022, was primarily driven by the tax effects related to the sale of the Vycom business.

Commitments And Contingencies

Commitments And Contingencies	3 Months Ended
	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	17. COMMITMENTS AND CONTINGENCIES Legal Proceedings During the year ended September 30, 2019, the Company was made aware of a worker’s compensation case that became reasonably possible to give rise to a liability. Discovery has been completed, and the Company filed motions for summary judgment in April 2023. On November 8, 2023, the court granted the Company's motions for summary judgment seeking to dismiss Scranton Products Inc. and The AZEK Company Inc. but denied the Company's motions for summary judgment seeking to dismiss The AZEK Group LLC and Vycom Corp. A trial date has been set for May 2024. In the normal course of the Company’s business, it is at times subject to various other legal actions, in some cases for which the relief or damages sought may be substantial. Although the Company is not able to predict the outcome of legal actions to which it may be subject, after reviewing all pending and threatened actions with counsel and based on information currently available, management believes that the outcome of such actions, individually or in the aggregate, will not have a material adverse effect on the Company’s results of operations or financial position. However, it is possible that the ultimate resolution of such matters, if unfavorable, may be material to the Company’s results of operations in a particular future period as the time and amount of any resolution of such actions and its relationship to the future results of operations are not currently known. The Company accrues for losses when they are probable of occurrence and such losses are reasonably estimable. Legal costs expected to be incurred are accounted for as they are incurred.

Condensed Financial Information

Condensed Financial Information of Registrant (Parent Company Only)	3 Months Ended
	Dec. 31, 2023
Condensed Financial Information Disclosure [Abstract]
Condensed Financial Information of Registrant (Parent Company Only)	18. CONDENSED FINANCIAL INFORMATION OF REGISTRANT (PARENT COMPANY ONLY) The AZEK Company Inc. (parent company only) Balance Sheets (In thousands of U.S. dollars, except for share and per share amounts) December 31, September 30, ASSETS: Non-current assets: Investments in subsidiaries $ 1,359,305 $ 1,429,643 Total non-current assets 1,359,305 1,429,643 Total assets $ 1,359,305 $ 1,429,643 LIABILITIES AND STOCKHOLDERS’ EQUITY: Total liabilities $ — $ — Stockholders’ equity: Preferred stock, $ 0.001 par value; 1,000,000 shares authorized and no shares — — Class A common stock, $ 0.001 par value; 1,100,000,000 shares authorized, 156,341,203 and 155,967,736 shares issued at December 31, 2023 and 156 156 Class B common stock, $ 0.001 par value; 100,000,000 shares authorized, 0 shares and 100 shares issued and outstanding at December 31, 2023 and — — Additional paid‑in capital 1,650,160 1,662,322 Accumulated deficit ( 19,328 ) ( 45,047 ) Accumulated other comprehensive income (loss) ( 1,217 ) 1,878 Treasury stock, at cost, 10,560,030 and 8,268,423 shares at December 31, ( 270,466 ) ( 189,666 ) Total stockholders’ equity 1,359,305 1,429,643 Total liabilities and stockholders’ equity $ 1,359,305 $ 1,429,643 Three Months Ended December 31, 2023 2022 Net income (loss) of subsidiaries $ 25,719 $ ( 25,836 ) Net income (loss) of subsidiaries $ 25,719 $ ( 25,836 ) Comprehensive income (loss) $ 22,624 $ ( 27,632 ) The AZEK Company Inc. did not have any cash as of December 31, 2023 or September 30, 2023. Accordingly a Condensed Statement of Cash Flows has not been presented. Basis of Presentation The parent company financial statements should be read in conjunction with the Company’s Consolidated Financial Statements and the accompanying notes thereto. For purposes of this condensed financial information, the Company’s wholly owned and majority owned subsidiaries are recorded based upon its proportionate share of the subsidiaries’ net assets (similar to presenting them on the equity method). Since the restricted net assets of The AZEK Company Inc. and its subsidiaries exceed 25 % of the consolidated net assets of the Company and its subsidiaries, the accompanying condensed parent company financial statements have been prepared in accordance with Rule 12-04, Schedule 1 of Regulation S-X. This information should be read in conjunction with the accompanying Condensed Consolidated Financial Statements. Dividends from Subsidiaries There were $ 100.0 million and $ 7.5 million in cash dividends paid to The AZEK Company Inc. from the Company’s consolidated subsidiaries during the three months ended December 31, 2023 and 2022 , respectively. Cash dividends of $ 100.0 million were used to fund the ASR during the three months ended December 31, 2023 and $ 7.5 million in cash dividends were used to fund share repurchases on the open market during the three months ended December 31, 2022. Restricted Payments The AZEK Group LLC is party to the Revolving Credit Facility and the Term Loan Agreement. The obligations under the Revolving Credit Facility and Term Loan Agreement are secured by substantially all of the present and future assets of the borrowers and guarantors, including equity interests of their domestic subsidiaries, subject to certain exceptions. The obligations under the Revolving Credit Facility and Term Loan Agreement are guaranteed by the Company and its wholly owned domestic subsidiaries other than certain immaterial subsidiaries and other excluded subsidiaries. The AZEK Group LLC is not permitted to make certain payments unless those payments are consistent with exceptions set forth in the agreements. These payments include repurchase of equity interests, fees associated with a public offering, income taxes due in other applicable payments. Further, the payments are only permitted if certain conditions are met related to availability and fixed charge coverage as defined in the Revolving Credit Facility and described in Note 8.

Organization and Summary of S_2

Organization and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The Company operates on a fiscal year ending September 30. The accompanying unaudited Condensed Consolidated Financial Statements and notes have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information, and in management’s opinion, includes all adjustments, consisting of only normal recurring adjustments, necessary for the fair statement of the Company’s financial position, its results of operations and cash flows for the interim periods presented. The results of operations for the three months ended December 31, 2023 and the cash flows for the three months ended December 31, 2023 are not necessarily indicative of the results to be expected for the full fiscal year or any other period. The Company’s financial condition and results of operations are affected by a number of factors, including, but not limited to, the cost to manufacture and distribute products, cost of raw materials, inflation, consumer spending and preferences, interest rates, the impact of any supply chain disruptions, economic conditions, and/or any adverse effects from geopolitical conflicts, global health pandemics and other factors beyond the Company’s control. Management cannot predict the degree to, or the period over, which the Company may be affected by such factors. The accompanying unaudited Condensed Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and notes thereto included in the Company’s 2023 Form 10-K. The Condensed Consolidated Balance Sheet as of September 30, 2023 was derived from the audited financial statements at that date. There have been no material changes in the Company’s significant accounting policies from those that were disclosed in the 2023 Form 10-K, except as noted below. Certain reclassifications have been made to prior year financial statements to conform to classifications used in the current year. These reclassifications had no impact on net income, stockholder’s equity or cash flows as previously reported.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses during the reporting period. Significant estimates include revenue recognition, reserves for excess inventory, inventory obsolescence, inventory valuation, product warranties, customer rebates, stock-based compensation, litigation, income taxes, contingent consideration, goodwill and intangible asset valuation and accounting for long-lived assets. Management’s estimates and assumptions are evaluated on an ongoing basis and are based on historical experience, current conditions and available information. Actual results may differ from estimated amounts. Estimates are revised as additional information becomes available.
Accounting Policies	Accounting Policies Refer to the Company’s 2023 Form 10-K for a discussion of the Company’s accounting policies, as updated below and for recently adopted accounting standards.
Research and Development Costs	Research and Development Costs Research and development costs primarily relate to new product development, product claims support and manufacturing process improvements. Such costs are expensed as incurred and are included in “Selling, general and administrative expenses” within the Condensed Consolidated Statements of Comprehensive Income (Loss). Total research and development expenses were $ 3.1 million and $ 2.1 million , respectively, for the three months ended December 31, 2023 and 2022 .
Recently Issued Accounting Pronouncements	Recently Adopted Accounting Pronouncements None. Recently Issued Accounting Pronouncements In November 2023, the Financial Accounting Standards Board ("FASB") issued ASU 2023-07, Segment Reporting (Topic 280) : Improvements to Reportable Segment Disclosures . This standard requires all public entities that are subject to segment reporting requirements to disclose additional information, including significant segment expenses and other segment items on an annual and interim basis. It also requires the disclosure of the title and the position of the chief operating decision maker and how the reported measures are used for making business decisions. This standard is effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. The Company intends to adopt the updated standard during the fiscal year beginning October 1, 2024. The Company is currently evaluating the impact the adoption of this standard will have on its disclosures. In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures . This standard expands the disclosure requirements primarily on the rate reconciliation and income tax paid. For public entities, this standard is effective for annual reporting periods beginning after December 15, 2024, with early adoption permitted. The Company intends to adopt the updated standard during the fiscal year beginning October 1, 2025. The Company is currently evaluating the impact the adoption of this standard will have on its disclosures.

Revenue (Tables)

Revenue (Tables)	3 Months Ended
	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Summary of Rebate Activity	The rebate activity was as follows (in thousands): Three Months Ended December 31, 2023 2022 Beginning balance $ 66,958 $ 56,542 Rebate expense 22,239 15,716 Rebate payments ( 16,804 ) ( 11,192 ) Ending balance $ 72,393 $ 61,066

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Dec. 31, 2023
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories consisted of the following (in thousands): in thousands December 31, September 30, Raw materials $ 60,918 $ 67,330 Work in process 31,742 37,038 Finished goods 168,902 116,733 Total inventories $ 261,562 $ 221,101

Property, Plant and Equipment_2

Property, Plant and Equipment - Net (Tables)	3 Months Ended
	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Summary of Property, Plant and Equipment - Net	Property, plant and equipment – net consisted of the following (in thousands): December 31, September 30, Land $ 3,209 $ 4,829 Buildings and improvements 103,824 129,031 Manufacturing equipment 595,551 624,754 Computer equipment 32,561 32,300 Furniture and fixtures 6,614 7,290 Vehicles 1,163 1,105 Total property and equipment 742,922 799,309 Construction in progress 79,314 94,422 822,236 893,731 Accumulated depreciation ( 365,732 ) ( 392,708 ) Total property and equipment – net $ 456,504 $ 501,023

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Net (Tables)	3 Months Ended
	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Changes in Carrying Amount of Goodwill	Goodwill consisted of the following (in thousands): Residential Commercial Total Goodwill before impairment as of September 30, 2023 $ 953,882 $ 72,589 $ 1,026,471 Accumulated impairment losses as of September 30, 2023 — ( 32,200 ) ( 32,200 ) Goodwill, net as of September 30, 2023 $ 953,882 $ 40,389 $ 994,271 Divestiture Goodwill disposal before impairment — ( 58,655 ) ( 58,655 ) Accumulated impairment losses — 32,200 32,200 Goodwill, net disposal — ( 26,455 ) ( 26,455 ) Goodwill before impairment as of December 31, 2023 $ 953,882 $ 13,934 $ 967,816 Accumulated impairment losses as of December 31, 2023 — — — Goodwill, net as of December 31, 2023 $ 953,882 $ 13,934 $ 967,816
Summary of Finite-lived Intangible Assets	Finite-lived intangible assets consisted of the following (in thousands): December 31, 2023 Lives in Gross Accumulated Net Proprietary knowledge 10 — 15 $ 300,400 $ ( 257,358 ) $ 43,042 Trademarks 5 — 20 217,640 ( 158,382 ) 59,258 Customer relationships 12 — 19 156,452 ( 77,558 ) 78,894 Patents 9 — 10 8,500 ( 6,138 ) 2,362 Other intangibles 3 — 15 4,076 ( 4,028 ) 48 Total intangible assets $ 687,068 $ ( 503,464 ) $ 183,604 September 30, 2023 Lives in Gross Accumulated Net Propriety knowledge 10 — 15 $ 300,400 $ ( 253,608 ) $ 46,792 Trademarks 5 — 20 230,240 ( 164,759 ) 65,481 Customer relationships 12 — 19 176,852 ( 92,268 ) 84,584 Patents 9 — 10 8,500 ( 5,913 ) 2,587 Other intangible assets 3 — 15 4,076 ( 4,023 ) 53 Total intangible assets $ 720,068 $ ( 520,571 ) $ 199,497

Composition of Certain Balanc_2

Composition of Certain Balance Sheet Accounts (Tables)	3 Months Ended
	Dec. 31, 2023
Composition Of Certain Balance Sheet Accounts Disclosure [Abstract]
Summary of Allowance for Doubtful Accounts	Allowance for doubtful accounts consisted of the following (in thousands): Three Months Ended December 31, 2023 2022 Beginning balance $ 1,773 $ 1,397 Provision ( 433 ) 277 Divestiture ( 32 ) — Ending balance $ 1,308 $ 1,674
Schedule of Accrued Expenses and Other Liabilities	Accrued expenses consisted of the following (in thousands): December 31, 2023 September 30, 2023 Taxes $ 28,168 $ 6,959 Employee related liabilities 20,673 34,313 Marketing 4,799 3,868 Lease liability - operating 4,559 4,180 Customer deposits 3,771 4,152 Warranty 2,927 2,739 Lease liability - finance 2,829 2,777 Freight 1,833 1,242 Utilities 1,802 2,141 Professional fees 1,706 2,073 Construction in progress 1,530 2,863 Commissions 873 991 Other 5,529 3,696 Total accrued expenses and other current liabilities $ 80,999 $ 71,994

Debt (Tables)

Debt (Tables)	3 Months Ended
	Dec. 31, 2023
Debt Disclosure [Abstract]
Summary of Long-term Debt	Debt consisted of the following (in thousands): December 31, 2023 September 30, 2023 Term Loan due April 28, 2029 — SOFR + 2.50 % + 0.1 % ( 7.96 % at December 31, 2023 and 7.92 % at September 30, 2023) $ 592,500 $ 594,000 Revolving Credit Facility through March 31, 2026 - SOFR + 0.1 % — — Total 592,500 594,000 Less unamortized deferred financing costs ( 3,818 ) ( 3,996 ) Less unamortized original issue discount ( 3,571 ) ( 3,739 ) Less current portion ( 6,000 ) ( 6,000 ) Long-term debt—less current portion and unamortized $ 579,111 $ 580,265
Summary of Interest Expense	Interest expense consisted of the following (in thousands): Three Months Ended December 31, 2023 2022 Interest expense: Term Loan Agreement $ 11,358 $ 8,916 Revolving Credit Facility 150 151 Other 1,123 1,109 Amortization - Deferred financing costs Term Loan Agreement 179 179 Revolving Credit Facility 66 66 Amortization - Original issue discount Term Loan Agreement 167 167 Capitalized interest ( 1,079 ) ( 1,289 ) Interest expense 11,964 9,299 Interest income ( 4,054 ) — Interest expense, net $ 7,910 $ 9,299

Product Warranties (Tables)

Product Warranties (Tables)	3 Months Ended
	Dec. 31, 2023
Product Warranties Disclosures [Abstract]
Summary of Warranty Reserve Activity	Warranty coverage depends on the product involved. The warranty reserve activity consisted of the following (in thousands): Three Months Ended December 31, 2023 2022 Beginning balance $ 16,195 $ 15,023 Adjustments to reserve ( 542 ) ( 172 ) Warranty claims payment ( 624 ) ( 313 ) Ending balance 15,029 14,538 Current portion of accrued warranty ( 2,927 ) ( 2,492 ) Accrued warranty – less current portion $ 12,102 $ 12,046

Leases (Tables)

Leases (Tables)	3 Months Ended
	Dec. 31, 2023
Leases [Abstract]
Summary of Lease Assets and Lease Liabilities	Lease assets and lease liabilities as of December 31, 2023 and September 30, 2023 were as follows (in thousands): Leases Classification on Balance Sheet December 31, 2023 September 30, 2023 Assets ROU operating lease assets Other assets $ 16,068 $ 15,423 ROU finance lease assets Other assets 70,554 71,529 Total lease assets $ 86,622 $ 86,952 Liabilities Current Operating Accrued expenses and other liabilities $ 4,559 $ 4,180 Finance Accrued expenses and other liabilities 2,829 2,777 Non-Current Operating Other non-current liabilities 13,916 13,699 Finance Other non-current liabilities 75,276 75,718 Total lease liabilities $ 96,580 $ 96,374
Components of Lease Expense	The components of lease expense for the three months ended December 31, 2023 and 2022 were as follows: Three Months Ended December 31, (in thousands) 2023 2022 Operating lease expense $ 1,478 $ 1,501 Finance lease amortization of assets 1,301 1,248 Finance lease interest on lease liabilities 1,107 1,092 Short term 86 103 Sublease income ( 28 ) ( 71 ) Total lease expense $ 3,944 $ 3,873
Supplemental Information Related to Leases	The tables below present supplemental information related to leases as of December 31, 2023 and September 30, 2023: Weighted-average remaining lease term (years) December 31, 2023 September 30, 2023 Operating leases 6.4 6.8 Finance leases 25.3 25.4 Weighted-average discount rate Operating leases 4.7 % 4.4 % Finance leases 5.8 % 5.8 %
Summary of Maturities of Lease Liabilities	The following table summarizes the maturities of lease liabilities at December 31, 2023: (in thousands) Operating Leases Finance Leases Total 2024 $ 4,045 $ 5,358 $ 9,403 2025 4,719 7,105 11,824 2026 2,844 6,942 9,786 2027 2,105 6,480 8,585 2028 1,841 5,278 7,119 Thereafter 6,071 117,012 123,083 Total lease payments 21,625 148,175 169,800 Less: interest ( 3,150 ) ( 70,070 ) ( 73,220 ) Present value of lease liability $ 18,475 $ 78,105 $ 96,580

Fair Value Of Financial Instr_2

Fair Value Of Financial Instruments (Tables)	3 Months Ended
	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Summary of Fair Values of Interest Rate Derivative Instruments as well as Classification on Balance Sheet	The following table provides the fair values of the interest rate derivative instruments as well as their classification on the Balance Sheet as of December 31, 2023 and September 30, 2023 (in thousands): Fair Value as of Fair Value Hierarchy Balance Sheet Location December 31, 2023 September 30, 2023 Assets Interest rate swaps Level 2 Other current assets $ 677 $ 2,558 Liabilities Interest rate swaps Level 2 Other non-current liabilities $ 2,300 $ 65
Summary of Effects of Interest Rate Derivative Instruments	The following table summarizes the effects of the interest rate derivative instruments on Accumulated other comprehensive income (loss) for the three months ended December 31, 2023 and 2022 (in thousands): Before-tax Amount Income Tax Expense Net of Tax Amount Balance - September 30, 2023 $ 2,493 $ 615 $ 1,878 Amount of loss recognized in other comprehensive income (loss) ( 3,437 ) ( 840 ) ( 2,596 ) Amount of gain reclassified from accumulated other comprehensive income (loss) into net income (loss) ( 678 ) ( 180 ) ( 499 ) Balance - December 31, 2023 $ ( 1,622 ) $ ( 405 ) $ ( 1,217 ) Before-tax Amount Income Tax Expense Net of Tax Amount Balance - September 30, 2022 $ — $ — $ — Amount of loss recognized in other comprehensive income (loss) ( 2,544 ) ( 674 ) ( 1,870 ) Amount of loss reclassified from accumulated other comprehensive income (loss) into net income (loss) 101 27 74 Balance - December 31, 2022 $ ( 2,443 ) $ ( 647 ) $ ( 1,796 )
Summary of Carrying Values and the Estimated Fair Values of the Debt Financial Instruments	The carrying values and the estimated fair values of the debt financial instruments (Level 2 measurements) consisted of the following (in thousands): December 31, 2023 September 30, 2023 Carrying Estimated Carrying Estimated Term Loan due April 28, 2029 $ 592,500 $ 596,944 $ 594,000 $ 595,485

Segments (Tables)

Segments (Tables)	3 Months Ended
	Dec. 31, 2023
Segment Reporting [Abstract]
Summary of Residential and Commercial Segment Reporting Information	The segment data below includes data for Residential and Commercial for the three months ended December 31, 2023 and 2022 (in thousands). Three Months Ended 2023 2022 Net sales to customers Residential $ 223,000 $ 179,484 Commercial 17,444 36,775 Total $ 240,444 $ 216,259 Adjusted EBITDA Residential (1) $ 52,762 $ 9,946 Commercial 2,905 5,154 Total Adjusted EBITDA for reporting segments $ 55,667 $ 15,100 Adjustments to Income before income tax provision Depreciation and amortization ( 31,937 ) ( 33,840 ) Stock-based compensation costs ( 8,468 ) ( 3,957 ) Acquisition and divestiture costs (2) ( 492 ) ( 2,954 ) Gain on sale of business (3) 38,515 — Other costs (4) ( 2,768 ) ( 214 ) Interest expense, net ( 7,910 ) ( 9,299 ) Income (loss) before income tax provision $ 42,607 $ ( 35,164 ) (1) Effective as of December 31, 2023, Residential segment Adjusted EBITDA includes all corporate expenses, such as selling, general and administrative costs related to our corporate offices, including payroll and other professional fees. The prior period has been recast to reflect the change. (2) Acquisition and divestiture costs reflect costs related to divestiture of $ 0.5 million for both the three months ended December 31, 2023 and 2022, respectively, and costs directly related to completed acquisitions of $ 2.4 million in the three months ended December 31, 2022. (3) Gain on sale of business relates to the sale of the Vycom business. (4) Other costs reflect costs related to the removal of dispensable equipment resulting from a modification of our manufacturing process of $ 2.4 million in the three months ended December 31, 2023, reduction in workforce costs of $ 0.3 million in the three months ended December 31, 2023, and costs for legal expenses of $ 0.1 million and $ 0.2 million in the three months ended December 31, 2023 and 2022, respectively.

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	3 Months Ended
	Dec. 31, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Share-Based Payment Award Valuation Assumptions	The following table sets forth the significant assumptions used for the calculation of stock-based compensation expense for the three months ended December 31, 2023 and 2022: December 15, December 12, Risk-free interest rate 3.93 % 3.77 % Expected volatility 40.00 % 40.00 % Expected term (in years) 6.00 6.00 Expected dividend yield 0.00 % 0.00 %
Performance Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Share-Based Compensation Stock Options Activity	The following table summarizes the performance-based stock option activity for the three months ended December 31, 2023: Number Weighted Weighted Aggregate (in years) (in thousands) Outstanding at October 1, 2023 1,114,261 $ 23.00 Granted — — Exercised ( 60,261 ) 23.00 Cancelled/Forfeited — — Outstanding at December 31, 2023 1,054,000 23.00 6.4 16,074 Vested and exercisable at December 31, 2023 1,054,000 $ 23.00 6.4 16,074
Service Based Stock Option Activity [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Share-Based Compensation Stock Options Activity	The following table summarizes the service-based stock option activity for the three months ended December 31, 2023: Number Weighted Weighted Aggregate (in years) (in thousands) Outstanding at October 1, 2023 3,361,707 $ 25.43 Granted 138,731 38.15 Exercised ( 76,624 ) 24.17 Cancelled/Forfeited — — Outstanding at December 31, 2023 3,423,814 25.97 7.0 43,493 Vested and exercisable at December 31, 2023 2,475,222 $ 24.78 6.7 33,921
Service Based Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Non-Vested Restricted Stock Activity	A summary of the service-based restricted stock awards activity during the three months ended December 31, 2023 was as follows: Number Weighted Outstanding and unvested at October 1, 2023 82,481 $ 23.00 Granted — — Vested ( 6,845 ) 23.00 Forfeited — — Outstanding and unvested at December 31, 2023 75,636 $ 23.00
Schedule of Unvested Restricted Stock Units	A summary of the service-based restricted stock unit awards activity for the three months ended December 31, 2023 was as follows: Number Weighted Outstanding and unvested at October 1, 2023 786,096 $ 25.42 Granted 204,796 38.12 Vested ( 224,591 ) 28.14 Forfeited ( 2,102 ) 24.85 Outstanding and unvested at December 31, 2023 764,199 $ 28.01
Performance Based Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Non-Vested Restricted Stock Activity	A summary of the performance-based restricted stock unit awards activity for the three months ended December 31, 2023 presented at target was as follows: Number Weighted Outstanding and unvested at October 1, 2023 508,622 $ 26.72 Granted 215,462 38.15 Vested ( 123,821 ) 34.82 Forfeited ( 3,308 ) 28.01 Outstanding and unvested at December 31, 2023 596,955 $ 28.91

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Dec. 31, 2023
Earnings Per Share [Abstract]
Summary of Computation of Basic And Diluted Earnings Per Share	The following table sets forth the computation of the Company’s basic and diluted EPS attributable to common stockholders (in thousands, except share and per share amounts): Three Months Ended December 31, 2023 2022 Numerator: Net income (loss) $ 25,719 $ ( 25,836 ) Net income (loss) attributable to $ 25,719 $ ( 25,836 ) Denominator: Weighted-average shares of common stock Basic 147,297,662 150,877,635 Diluted 148,876,282 150,877,635 Net income (loss) per share attributable Net income (loss) per common share - basic $ 0.17 $ ( 0.17 ) Net income (loss) per common share - diluted $ 0.17 $ ( 0.17 )
Summary of Antidilutive Securities Excluded From Computation of Earnings Per Share	The following table includes the number of shares that may be dilutive common shares in the future, and were not included in the computation of diluted net income per share because the effect was anti-dilutive: Three Months Ended December 31, 2023 2022 Stock Options 547,890 5,010,161 Restricted Stock Units 108,736 531,462

Condensed Financial Informati_2

Condensed Financial Information of Registrant (Parent Company Only) (Tables) - Parent Company [Member]	3 Months Ended
	Dec. 31, 2023
Schedule of Balance Sheets	The AZEK Company Inc. (parent company only) Balance Sheets (In thousands of U.S. dollars, except for share and per share amounts) December 31, September 30, ASSETS: Non-current assets: Investments in subsidiaries $ 1,359,305 $ 1,429,643 Total non-current assets 1,359,305 1,429,643 Total assets $ 1,359,305 $ 1,429,643 LIABILITIES AND STOCKHOLDERS’ EQUITY: Total liabilities $ — $ — Stockholders’ equity: Preferred stock, $ 0.001 par value; 1,000,000 shares authorized and no shares — — Class A common stock, $ 0.001 par value; 1,100,000,000 shares authorized, 156,341,203 and 155,967,736 shares issued at December 31, 2023 and 156 156 Class B common stock, $ 0.001 par value; 100,000,000 shares authorized, 0 shares and 100 shares issued and outstanding at December 31, 2023 and — — Additional paid‑in capital 1,650,160 1,662,322 Accumulated deficit ( 19,328 ) ( 45,047 ) Accumulated other comprehensive income (loss) ( 1,217 ) 1,878 Treasury stock, at cost, 10,560,030 and 8,268,423 shares at December 31, ( 270,466 ) ( 189,666 ) Total stockholders’ equity 1,359,305 1,429,643 Total liabilities and stockholders’ equity $ 1,359,305 $ 1,429,643
Schedule of Statements of Comprehensive Income (Loss)	Three Months Ended December 31, 2023 2022 Net income (loss) of subsidiaries $ 25,719 $ ( 25,836 ) Net income (loss) of subsidiaries $ 25,719 $ ( 25,836 ) Comprehensive income (loss) $ 22,624 $ ( 27,632 )

Organization and Summary of S_3

Organization and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Accounting Policies [Abstract]
Research and development expenses	$ 3.1	$ 2.1

Revenue - Additional Informatio

Revenue - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Accrued rebates	$ 67,925	$ 60,974	$ 54,600
Contra trade receivable	$ 4,500		$ 6,500

Revenue - Summary of Rebate Act

Revenue - Summary of Rebate Activity (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Beginning balance	$ 66,958	$ 56,542
Rebate expense	22,239	15,716
Rebate payments	(16,804)	(11,192)
Ending balance	$ 72,393	$ 61,066

Divestiture - Additional Inform

Divestiture - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended
	Nov. 01, 2023	Dec. 31, 2023
Business Acquisition [Line Items]
Gain on sale of business		$ 38,515
Vycom Business [Member]
Business Acquisition [Line Items]
Sales transaction closing date	Nov. 01, 2023
Net proceeds from sale of business	$ 133,100
Gain on sale of business	$ 38,500

Inventories - Schedule of Inven

Inventories - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Inventory Disclosure [Abstract]
Raw materials	$ 60,918	$ 67,330
Work in process	31,742	37,038
Finished goods	168,902	116,733
Total inventories	$ 261,562	$ 221,101

Property, Plant and Equipment_3

Property, Plant and Equipment - Net - Summary of Property, Plant and Equipment - Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Property, Plant and Equipment [Abstract]
Land	$ 3,209	$ 4,829
Buildings and improvements	103,824	129,031
Manufacturing equipment	595,551	624,754
Computer equipment	32,561	32,300
Furniture and fixtures	6,614	7,290
Vehicles	1,163	1,105
Property Plant and Equipment Excluding Construction in Progress Gross	742,922	799,309
Construction in progress	79,314	94,422
Property and Equipment, Gross	822,236	893,731
Accumulated depreciation	(365,732)	(392,708)
Total property and equipment – net	$ 456,504	$ 501,023

Property, Plant and Equipment_4

Property, Plant and Equipment - Net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Depreciation	$ 20.5	$ 20.8
Interest Capitalized	$ 1.1	$ 1.3

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Net - Summary of Changes in Carrying Amount of Goodwill (Detail) $ in Thousands	3 Months Ended
	Dec. 31, 2023 USD ($)
Goodwill [Line Items]
Goodwill before impairment, beginning balance	$ 1,026,471
Accumulated impairment losses, beginning balance	(32,200)
Goodwill net, beginning balance	994,271
Divestiture - Goodwill disposal before impairment	(58,655)
Divestiture - Accumulated impairment losses	32,200
Divestiture - Goodwill, net disposal	(26,455)
Goodwill before impairment, ending balance	967,816
Goodwill net, ending balance	967,816
Residential [Member]
Goodwill [Line Items]
Goodwill before impairment, beginning balance	953,882
Goodwill net, beginning balance	953,882
Goodwill before impairment, ending balance	953,882
Goodwill net, ending balance	953,882
Commercial [Member]
Goodwill [Line Items]
Goodwill before impairment, beginning balance	72,589
Accumulated impairment losses, beginning balance	(32,200)
Goodwill net, beginning balance	40,389
Divestiture - Goodwill disposal before impairment	(58,655)
Divestiture - Accumulated impairment losses	32,200
Divestiture - Goodwill, net disposal	(26,455)
Goodwill before impairment, ending balance	13,934
Goodwill net, ending balance	$ 13,934

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Net - Additional Information (Detail) - USD ($)	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Indefinite lived intangible assets other than goodwill	$ 0		$ 0
Amortization expense	$ 10,164,000	$ 11,837,000
Remaining weighted-average amortization period for acquired intangible assets	11 years 1 month 6 days

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets - Net - Summary of Finite-Lived Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 687,068	$ 720,068
Accumulated Amortization	(503,464)	(520,571)
Net Carrying Value	183,604	199,497
Proprietary Knowledge [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	300,400
Accumulated Amortization	(257,358)
Net Carrying Value	43,042
Propriety Knowledge [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value		300,400
Accumulated Amortization		(253,608)
Net Carrying Value		46,792
Trademarks [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	217,640	230,240
Accumulated Amortization	(158,382)	(164,759)
Net Carrying Value	59,258	65,481
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	156,452	176,852
Accumulated Amortization	(77,558)	(92,268)
Net Carrying Value	78,894	84,584
Patents [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	8,500	8,500
Accumulated Amortization	(6,138)	(5,913)
Net Carrying Value	2,362	2,587
Other Intangibles [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	4,076	4,076
Accumulated Amortization	(4,028)	(4,023)
Net Carrying Value	$ 48	$ 53
Minimum [Member] | Proprietary Knowledge [Member]
Finite Lived Intangible Assets [Line Items]
Acquired finite lived intangible asset useful life	10 years
Minimum [Member] | Propriety Knowledge [Member]
Finite Lived Intangible Assets [Line Items]
Acquired finite lived intangible asset useful life		10 years
Minimum [Member] | Trademarks [Member]
Finite Lived Intangible Assets [Line Items]
Acquired finite lived intangible asset useful life	5 years	5 years
Minimum [Member] | Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Acquired finite lived intangible asset useful life	12 years	12 years
Minimum [Member] | Patents [Member]
Finite Lived Intangible Assets [Line Items]
Acquired finite lived intangible asset useful life	9 years	9 years
Minimum [Member] | Other Intangibles [Member]
Finite Lived Intangible Assets [Line Items]
Acquired finite lived intangible asset useful life	3 years	3 years
Maximum [Member] | Proprietary Knowledge [Member]
Finite Lived Intangible Assets [Line Items]
Acquired finite lived intangible asset useful life	15 years
Maximum [Member] | Propriety Knowledge [Member]
Finite Lived Intangible Assets [Line Items]
Acquired finite lived intangible asset useful life		15 years
Maximum [Member] | Trademarks [Member]
Finite Lived Intangible Assets [Line Items]
Acquired finite lived intangible asset useful life	20 years	20 years
Maximum [Member] | Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Acquired finite lived intangible asset useful life	19 years	19 years
Maximum [Member] | Patents [Member]
Finite Lived Intangible Assets [Line Items]
Acquired finite lived intangible asset useful life	10 years	10 years
Maximum [Member] | Other Intangibles [Member]
Finite Lived Intangible Assets [Line Items]
Acquired finite lived intangible asset useful life	15 years	15 years

Composition of Certain Balanc_3

Composition of Certain Balance Sheet Accounts - Summary of Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Allowance for Credit Loss [Abstract]
Beginning balance	$ 1,773	$ 1,397
Provision	(433)	277
Divestiture	(32)
Ending balance	$ 1,308	$ 1,674

Composition of Certain Balanc_4

Composition of Certain Balance Sheet Accounts - Summary of Accrued Expenses and Other Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Accrued Liabilities and Other Liabilities [Abstract]
Employee related liabilities	$ 20,673	$ 34,313
Taxes	28,168	6,959
Lease liability - operating	4,559	4,180
Customer deposits	3,771	4,152
Marketing	4,799	3,868
Lease liability - finance	$ 2,829	$ 2,777
Finance Lease Liability Current Statement Of Financial Position [Extensible List]	Total accrued expenses and other current liabilities	Total accrued expenses and other current liabilities
Warranty	$ 2,927	$ 2,739
Freight	1,833	1,242
Utilities	1,802	2,141
Commissions	873	991
Professional fees	1,706	2,073
Construction in progress	1,530	2,863
Other	5,529	3,696
Total accrued expenses and other current liabilities	$ 80,999	$ 71,994

Debt - Summary of Long-Term Deb

Debt - Summary of Long-Term Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 592,500	$ 594,000
Less unamortized deferred financing costs	(3,818)	(3,996)
Less unamortized original issue discount	(3,571)	(3,739)
Less current portion	(6,000)	(6,000)
Long-term debt—less current portion and unamortized deferred financing costs	579,111	580,265
Term Loan [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	592,500	594,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Less unamortized deferred financing costs	$ (600)	$ (700)

Debt - Summary of Long-Term D_2

Debt - Summary of Long-Term Debt (Detail) (Parenthetical)	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023
Term Loan Agreement
Debt Instrument [Line Items]
Debt instrument maturity date	Apr. 28, 2029
Debt instrument, description of variable rate basis	SOFR + 2.50% + 0.1	SOFR + 2.50% + 0.1
Debt instrument, basis spread on variable rate	2.50%	2.50%
Debt instrument rate	7.96%	7.92%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument maturity date	Mar. 31, 2026
Debt instrument, description of variable rate basis	SOFR + 0.1%	SOFR + 0.1%
Debt instrument, basis spread on variable rate	0.10%	0.10%

Debt - Additional Information (

Debt - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended	12 Months Ended
	Jan. 26, 2023	Dec. 31, 2023	Dec. 31, 2022	Jun. 30, 2023	Sep. 30, 2023
Debt Instrument [Line Items]
Long-term Debt, Gross		$ 592,500,000			$ 594,000,000
Deferred financing cost		$ 3,818,000			$ 3,996,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument maturity date		Mar. 31, 2026
Debt instrument, basis spread on variable rate		0.10%			0.10%
Deferred financing cost		$ 600,000			$ 700,000
Aggregate maximum borrowing capacity		150,000,000
Outstanding letters of credit		2,200,000			$ 2,800,000
Available borrowing capacity		$ 100,000,000
Debt instrument interest rate description				(i) for ABR borrowings, the highest of (a) the Federal Funds Rate plus 50 basis points, (b) the prime rate and (c) the Adjusted Term SOFR as of such date for a deposit in U.S. dollars with a maturity of one month plus 100 basis points, plus, in each case, a spread of 25 to 75 basis points, based on average historical availability, or (ii) for SOFR borrowings, the Adjusted Term SOFR plus a spread of 125 to 175 basis points, based on average historical availability.
Debt instrument, description of variable rate basis		SOFR + 0.1%			SOFR + 0.1%
Line of credit facility, commitment fee description		If the average daily used percentage is greater than 50%, the commitment fee equals 25 basis points, and if the average daily used percentage is less than or equal to 50%, the commitment fee equals 37.5 basis points.
Line of credit facility, commitment fee amount		$ 100,000	$ 100,000
Debt instrument, covenant description		(i) 10% of the lesser of the aggregate commitments under the Revolving Credit Facility and the borrowing base, and (ii) $12.5 million.
Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument maturity date		Mar. 31, 2026
Revolving Credit Facility [Member] | The AZEK Group LLC
Debt Instrument [Line Items]
Outstanding letters of credit		$ 0			$ 0
Available borrowing capacity		$ 147,800,000
Debt instrument, covenant description		The AZEK Group LLC is also required to make mandatory prepayments (i) when aggregate borrowings exceed commitments or the applicable borrowing base and (ii) during “cash dominion,” which occurs if (a) the availability under the Revolving Credit Facility is less than the greater of (i) $12.5 million and (ii) 10% of the lesser of (x) $150.0 million and (y) the borrowing base, for five consecutive business days or (b) certain events of default have occurred and are continuing.
Revolving Credit Facility [Member] | The AZEK Group LLC | Maximum [Member]
Debt Instrument [Line Items]
Maximum fixed charge coverage ratio		100
Revolving Credit Facility [Member] | The AZEK Group LLC | Minimum [Member]
Debt Instrument [Line Items]
Minimum fixed charge coverage ratio		100
Revolving Credit Facility [Member] | Abr Borrowings
Debt Instrument [Line Items]
Debt instrument interest rate description		(i) for ABR borrowings, the highest of (a) the Federal Funds Rate plus 50 basis points, (b) the prime rate and (c) the Adjusted Term SOFR as of such date for a deposit in U.S. dollars with a maturity of one month plus 100 basis points, plus, in each case, a spread of 25 to 75 basis points, based on average historical availability
Revolving Credit Facility [Member] | SOFR Borrowings [Member]
Debt Instrument [Line Items]
Debt instrument interest rate description		for SOFR borrowings, the Adjusted Term SOFR plus a spread of 125 to 175 basis points, based on average historical availability
Federal Funds Rate | Revolving Credit Facility [Member] | Abr Borrowings
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis		Federal Funds Rate plus 50 basis points
Team SOFR | Revolving Credit Facility [Member] | The AZEK Group LLC
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.10%
Team SOFR | Revolving Credit Facility [Member] | Abr Borrowings
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis		Adjusted Term SOFR as of such date for a deposit in U.S. dollars with a maturity of one month plus 100 basis points, plus, in each case, a spread of 25 to 75 basis points
Team SOFR | Revolving Credit Facility [Member] | SOFR Borrowings [Member]
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis		Term SOFR plus a spread of 125 to 175 basis points
Prime Rate [Member] | Revolving Credit Facility [Member] | Abr Borrowings
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis		prime rate
Term Loan Agreement
Debt Instrument [Line Items]
Long-term Debt, Gross		$ 592,500,000			$ 594,000,000
Debt instrument maturity date		Apr. 28, 2029
Percentage of principal amount to be repaid by way of instalments		0.25%
Debt instrument, basis spread on variable rate		2.50%			2.50%
Deferred financing cost		$ 3,800,000			$ 4,000,000
Debt instrument, description of variable rate basis		SOFR + 2.50% + 0.1			SOFR + 2.50% + 0.1
Term Loan Agreement | Federal Funds Rate | Abr Borrowings
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		0.50%
Term Loan Agreement | Team SOFR | Abr Borrowings
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		1%
Applicable margin rate		1.50%
Term Loan Agreement | Team SOFR | SOFR Borrowings [Member]
Debt Instrument [Line Items]
Applicable margin rate		2.50%
Term Loan Agreement | Alternative Base Rate | Abr Borrowings
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		1.50%

Debt - Summary of Interest Expe

Debt - Summary of Interest Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Interest expense
Other	$ 1,123	$ 1,109
Amortization - Original issue discount
Capitalized interest	(1,079)	(1,289)
Interest expense	11,964	9,299
Interest income	(4,054)
Interest expense, net	7,910	9,299
Term Loan Agreement
Interest expense
Interest Expense, debt	11,358	8,916
Amortization - Debt issue costs
Amortization - Deferred financing costs	179	179
Amortization - Original issue discount
Term Loan OID	167	167
Revolving Credit Facility [Member]
Interest expense
Interest Expense, debt	150	151
Amortization - Debt issue costs
Amortization - Deferred financing costs	$ 66	$ 66

Product Warranties - Additional

Product Warranties - Additional Information (Detail)	3 Months Ended
	Dec. 31, 2023
Product Warranties Disclosures [Abstract]
Assurance of product	The Company provides product assurance warranties of various lengths ranging from 5 years to lifetime for limited coverage for a variety of material and workmanship defects based on standard terms and conditions between the Company and its customers.

Product Warranties - Summary of

Product Warranties - Summary of Warranty Reserve Activity (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Product Warranties Disclosures [Abstract]
Beginning balance	$ 16,195	$ 15,023
Adjustments to reserve	(542)	(172)
Warranty claims payment	(624)	(313)
Ending balance	15,029	14,538
Current portion of accrued warranty	(2,927)	(2,492)
Accrued warranty – less current portion	$ 12,102	$ 12,046

Leases - Additional Information

Leases - Additional Information (Detail)	3 Months Ended
	Dec. 31, 2023
Minimum [Member]
Lessee Lease Description [Line Items]
Renewal options range	1 year
Maximum [Member]
Lessee Lease Description [Line Items]
Renewal options range	20 years

Leases - Summary of Lease Asset

Leases - Summary of Lease Assets and Lease Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Assets
ROU operating lease assets	$ 16,068	$ 15,423
Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List	Other assets	Other assets
ROU finance lease assets	$ 70,554	$ 71,529
Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List	Other assets	Other assets
Total lease assets	$ 86,622	$ 86,952
Current liabilities
Operating	$ 4,559	$ 4,180
Operating Lease Liability Current Statement Of Financial Position Extensible List	Accrued expenses and other liabilities	Accrued expenses and other liabilities
Finance	$ 2,829	$ 2,777
Finance Lease Liability Current Statement Of Financial Position Extensible List	Accrued expenses and other liabilities	Accrued expenses and other liabilities
Non-Current liabilities
Operating	$ 13,916	$ 13,699
Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List	Other non-current liabilities	Other non-current liabilities
Finance	$ 75,276	$ 75,718
Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List	Other non-current liabilities	Other non-current liabilities
Total lease liabilities	$ 96,580	$ 96,374

Leases - Components of Lease Ex

Leases - Components of Lease Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease expense	$ 1,478	$ 1,501
Finance lease amortization of assets	1,301	1,248
Finance lease interest on lease liabilities	1,107	1,092
Short term	86	103
Sublease income	(28)	(71)
Total lease expense	$ 3,944	$ 3,873

Leases - Supplemental Informati

Leases - Supplemental Information related to Leases (Detail)	Dec. 31, 2023	Sep. 30, 2023
Weighted-average remaining lease term (years)
Operating leases	6 years 4 months 24 days	6 years 9 months 18 days
Finance leases	25 years 3 months 18 days	25 years 4 months 24 days
Weighted-average discount rate
Operating leases	4.70%	4.40%
Finance leases	5.80%	5.80%

Leases - Summary of Maturities

Leases - Summary of Maturities of Lease Liabilities (Detail) $ in Thousands	Dec. 31, 2023 USD ($)
Operating Leases
2024	$ 4,045
2025	4,719
2026	2,844
2027	2,105
2028	1,841
Thereafter	6,071
Total lease payments	21,625
Less: interest	(3,150)
Present value of lease liability	18,475
Finance Leases
2024	5,358
2025	7,105
2026	6,942
2027	6,480
2028	5,278
Thereafter	117,012
Total lease payments	148,175
Less: interest	(70,070)
Present value of lease liability	78,105
Total
2024	9,403
2025	11,824
2026	9,786
2027	8,585
2028	7,119
Thereafter	123,083
Total lease payments	169,800
Less: interest	(73,220)
Present value of lease liability	$ 96,580

Fair Value Of Financial Instr_3

Fair Value Of Financial Instruments - Additional Information (Detail) $ in Thousands		3 Months Ended		12 Months Ended
	Aug. 01, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Apr. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Nov. 30, 2022 USD ($) Agreement	Dec. 29, 2021 USD ($)
Fair Value Of Financial Instruments [Line Items]
Fair value adjustment for contingent consideration			$ 400
StruXure Outdoor, LLC [Member]
Fair Value Of Financial Instruments [Line Items]
Contingent payment arrangements, range of outcomes, value, low		$ 0
Contingent payment arrangements, range of outcomes, value, high		$ 13,900
Contingent consideration							$ 12,700		$ 9,500
Contingent liability						$ 12,700
Contingent payment compensation expense				$ 3,200	$ 9,500
INTEX Millwork Solutions, LLC
Fair Value Of Financial Instruments [Line Items]
Contingent payment arrangements, range of outcomes, value, low	$ 0
Contingent payment arrangements, range of outcomes, value, high	6,200
Contingent consideration	$ 5,800		$ 6,200
Contingent liability				6,200
Date of acquisition	Aug. 01, 2022
INTEX Millwork Solutions, LLC | Selling, General and Administrative Expense [Member]
Fair Value Of Financial Instruments [Line Items]
Fair value adjustment for contingent consideration				$ 400
Derivatives [Member]
Fair Value Of Financial Instruments [Line Items]
Number of interest rate swap agreements | Agreement								2
Derivative, notional amount								$ 150,000
Derivative, maturity date		Oct. 31, 2025
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, before tax		$ 600
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, after tax		$ 400
Derivatives [Member] | Interest Rate Swap 2 [Member]
Fair Value Of Financial Instruments [Line Items]
Derivative, fixed interest rate								4.39%
Derivatives [Member] | Interest Rate Swap 1 [Member]
Fair Value Of Financial Instruments [Line Items]
Derivative, fixed interest rate								4.48%

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Summary of Fair Values of Interest Rate Derivative Instruments as well as Classification on the Balance Sheet (Detail) - Fair Value, Inputs, Level 2 [Member] - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swaps	$ 677	$ 2,558
Interest rate swaps	$ 2,300	$ 65

Fair Value Of Financial Instr_5

Fair Value Of Financial Instruments - Summary of Effects of Interest Rate Derivative Instruments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Effect Of Cash Flow Hedge Accounting On AOCI [Line Items]
Balance, Before-tax amount	$ 2,493
Balance, Income tax expense	615
Balance, Net of tax amount	1,878
Amount of loss recognized in other comprehensive income (loss), Before-tax amount	(3,437)	$ (2,544)
Amount of loss recognized in other comprehensive income (loss), Income tax expense	(840)	(674)
Amount of loss recognized in other comprehensive income (loss), Net of tax amount	(2,596)	(1,870)
Amount of gain reclassified from accumulated other comprehensive income (loss) into net income (loss), Before-tax amount	(678)	101
Amount of gain reclassified from accumulated other comprehensive income (loss) into net income (loss), Income tax expense	(180)	27
Amount of gain reclassified from accumulated other comprehensive income (loss) into net income (loss), Net of tax amount	(499)	74
Balance, Before-tax amount	(1,622)	(2,443)
Balance, Income tax expense	(405)	(647)
Balance, Net of tax amount	$ (1,217)	$ (1,796)

Fair Value Of Financial Instr_6

Fair Value Of Financial Instruments - Summary of Carrying Values and the Estimated Fair Values of the Debt Financial Instruments (Detail) - Term Loan due April 28, 2029 [Member] - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Sep. 30, 2023
Schedule of carrying values and the estimated fair values of the debt financial instruments [Line Items]
Debt instrument maturity date	Apr. 28, 2029
Carrying Value [Member] | Fair Value, Inputs, Level 2 [Member]
Schedule of carrying values and the estimated fair values of the debt financial instruments [Line Items]
Loans payable	$ 592,500	$ 594,000
Estimated Fair Value [Member] | Fair Value, Inputs, Level 2 [Member]
Schedule of carrying values and the estimated fair values of the debt financial instruments [Line Items]
Loans payable	$ 596,944	$ 595,485

Segments - Additional Informati

Segments - Additional Information (Detail)	3 Months Ended
	Dec. 31, 2023 Segment
Segment Reporting [Abstract]
Number of Reportable Segments	2

Segments - Summary of Residenti

Segments - Summary of Residential and Commercial Segment Reporting Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Net sales to customers	$ 240,444	$ 216,259
Adjusted EBITDA
Total Adjusted EBITDA for reporting segments	55,667	15,100
Adjustments to Income before income tax provision
Depreciation and amortization	(31,937)	(33,840)
Stock-based compensation costs	(8,468)	(3,957)
Acquisition and divestiture costs	(492)	(2,954)
Gain on sale of business	38,515
Other costs	(2,768)	(214)
Interest expense, net	(7,910)	(9,299)
Income (loss) before income tax provision	42,607	35,164
Residential [Member]
Segment Reporting Information [Line Items]
Net sales to customers	223,000	179,484
Adjusted EBITDA
Total Adjusted EBITDA for reporting segments	52,762	9,946
Commercial [Member]
Segment Reporting Information [Line Items]
Net sales to customers	17,444	36,775
Adjusted EBITDA
Total Adjusted EBITDA for reporting segments	$ 2,905	$ 5,154

Segments - Summary of Residen_2

Segments - Summary of Residential and Commercial Segment Reporting Information (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Business Transformation Costs [Line Items]
Divestiture costs	$ 0.5	$ 0.5
Business acquisition acquisition costs completed acquisitions		2.4
Costs Of Reduction In Workforce	0.3
Legal expenses	0.1	$ 0.2
Costs for process improvement	$ 2.4

Capital Stock - Additional Info

Capital Stock - Additional Information (Detail) - USD ($)			3 Months Ended
	Dec. 06, 2023	Dec. 04, 2023	Dec. 31, 2022	Dec. 31, 2023	May 05, 2022
Class Of Stock [Line Items]
Number of shares available for repurchase				$ 101,100,000
Common Class A [Member]
Class Of Stock [Line Items]
Excise tax as reacquisition cost of share repurchases				$ 800,000
Common Class A [Member] | Open Market [Member]
Class Of Stock [Line Items]
Average price per share			$ 21.23
Share repurchase program, share repurchased value			$ 7,500,000
Stock repurchase program, shares repurchased			352,760
Common Class A [Member] | Maximum [Member]
Class Of Stock [Line Items]
Stock repurchase program, authorized amount					$ 400,000,000
Goldman Sachs [Member] | Common Class A [Member] | Accelerated Share Repurchase Agreement [Member]
Class Of Stock [Line Items]
Share repurchase program, share repurchased value		$ 100,000,000
Stock repurchase program, shares repurchased	2,291,607
Share repurchase program, price per share		$ 34.91
Stock repurchase program, percentage of initial shares on total shares		80%

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock based compensation expenses	$ 1,900
Stock based compensation expenses	8,468	$ 3,957
Income tax benefit stock based compensation expenses	1,700	800
Unvested stock compensation not recognised	$ 36,600
Unvested stock awards weighted average remaining period of recognition	2 years
Selling, General and Administrative Expense [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock based compensation expenses	$ 8,500	$ 4,000
2020 Omnibus Incentive Compensation Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum number of shares authorised under share based compensation plan	15,852,319
Common stock shares reserved for future issuance	2,219,224
Stock based compensation period of expiry of stock options	10 years

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Share-Based Payment Award Valuation Assumptions (Detail)	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Risk-free interest rate	3.93%	3.77%
Expected volatility	40%	40%
Expected term (in years)	6 years	6 years
Expected dividend yield	0%	0%

Stock-Based Compensation - Su_2

Stock-Based Compensation - Summary of Stock Option Activities (Detail) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2023 USD ($) $ / shares shares
Performance Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Option, Outstanding | shares	1,114,261
Number of Option, Granted | shares	0
Number of Option, Exercised | shares	(60,261)
Number of Option, Outstanding | shares	1,054,000
Number of Option, Vested and exercisable | shares	1,054,000
Weighted Average Exercise Price Per Share, Outstanding | $ / shares	$ 23
Weighted Average Exercise Price Per Share, Granted | $ / shares	0
Weighted Average Exercise Price Per Share, Exercised | $ / shares	23
Weighted Average Exercise Price Per Share, Outstanding | $ / shares	23
Weighted Average Exercise Price Per Share, Vested and exercisable | $ / shares	$ 23
Weighted Average Remaining Contract Term, Outstanding	6 years 4 months 24 days
Weighted Average Remaining Contract Term, Vested and exercisable	6 years 4 months 24 days
Weighted Average Intrinsic Value, Outstanding | $	$ 16,074
Weighted Average Intrinsic Value, Vested and exercisable | $	$ 16,074
Service Based Stock Option Activity [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Option, Outstanding | shares	3,361,707
Number of Option, Granted | shares	138,731
Number of Option, Exercised | shares	(76,624)
Number of Option, Outstanding | shares	3,423,814
Number of Option, Vested and exercisable | shares	2,475,222
Weighted Average Exercise Price Per Share, Outstanding | $ / shares	$ 25.43
Weighted Average Exercise Price Per Share, Granted | $ / shares	38.15
Weighted Average Exercise Price Per Share, Exercised | $ / shares	24.17
Weighted Average Exercise Price Per Share, Outstanding | $ / shares	25.97
Weighted Average Exercise Price Per Share, Vested and exercisable | $ / shares	$ 24.78
Weighted Average Remaining Contract Term, Outstanding	7 years
Weighted Average Remaining Contract Term, Vested and exercisable	6 years 8 months 12 days
Weighted Average Intrinsic Value, Outstanding | $	$ 43,493
Weighted Average Intrinsic Value, Vested and exercisable | $	$ 33,921

Stock-Based Compensation - Su_3

Stock-Based Compensation - Summary of Stock Awards Activity Other Than Options (Detail)	3 Months Ended
	Dec. 31, 2023 $ / shares shares
Service Based Restricted Stock Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Outstanding and unvested | shares	82,481
Number of Shares, Vested | shares	(6,845)
Number of Shares, Outstanding and unvested | shares	75,636
Weighted Average Grant Date Fair Value, Outstanding and unvested	$ 23
Weighted Average Grant Date Fair Value, Granted	0
Weighted Average Grant Date Fair Value, Vested	23
Weighted Average Grant Date Fair Value, Forfeited	0
Weighted Average Grant Date Fair Value, Outstanding and unvested	$ 23
Performance Based Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Outstanding and unvested | shares	508,622
Number of Shares, Granted | shares	215,462
Number of Shares, Vested | shares	(123,821)
Number of Shares, Forfeited | shares	(3,308)
Number of Shares, Outstanding and unvested | shares	596,955
Weighted Average Grant Date Fair Value, Outstanding and unvested	$ 26.72
Weighted Average Grant Date Fair Value, Granted	38.15
Weighted Average Grant Date Fair Value, Vested	34.82
Weighted Average Grant Date Fair Value, Forfeited	28.01
Weighted Average Grant Date Fair Value, Outstanding and unvested	$ 28.91

Stock-Based Compensation - Su_4

Stock-Based Compensation - Summary of Restricted Stock Unit Awards Activity (Detail) - Service Based Restricted Stock Units [Member]	3 Months Ended
	Dec. 31, 2023 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Outstanding and unvested | shares	786,096
Number of Shares, Granted | shares	204,796
Number of Shares, Vested | shares	(224,591)
Number of Shares, Forfeited | shares	(2,102)
Number of Shares, Outstanding and unvested | shares	764,199
Weighted Average Grant Date Fair Value, Outstanding and unvested | $ / shares	$ 25.42
Weighted Average Grant Date Fair Value, Granted | $ / shares	38.12
Weighted Average Grant Date Fair Value, Vested | $ / shares	28.14
Weighted Average Grant Date Fair Value, Forfeited | $ / shares	24.85
Weighted Average Grant Date Fair Value, Outstanding and unvested | $ / shares	$ 28.01

Earnings Per Share - Summary of

Earnings Per Share - Summary of Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Numerator:
Net Income (Loss)	$ 25,719	$ (25,836)
Net income (loss) attributable to common stockholders - basic	25,719	(25,836)
Net income (loss) attributable to common stockholders - diluted	$ 25,719	$ (25,836)
Denominator:
Basic	147,297,662	150,877,635
Diluted	148,876,282	150,877,635
Basic	$ 0.17	$ (0.17)
Diluted	$ 0.17	$ (0.17)

Earnings Per Share - Summary _2

Earnings Per Share - Summary of Antidilutive Securities Excluded From Computation of Earnings Per Share (Detail) - shares	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	547,890	5,010,161
Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	108,736	531,462

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail)	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Effective income tax reconciliation percentage	39.60%	26.50%

Condensed Financial Informati_3

Condensed Financial Information of Registrant (Parent Company Only) - Schedule of Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Non-current assets:
Total assets	$ 2,288,728	$ 2,365,554
LIABILITIES AND STOCKHOLDERS' EQUITY:
Total liabilities	929,423	935,911
Stockholders' equity:
Preferred stock, $0.001 par value; 1,000,000 shares authorized and no shares issued or outstanding at December 31, 2023 and September 30, 2023, respectively
Additional paid‑in capital	1,650,160	1,662,322
Accumulated deficit	(19,328)	(45,047)
Accumulated other comprehensive income (loss)	(1,217)	1,878	$ (1,796)
Treasury stock, at cost, 10,560,030 and 8,268,423 shares at December 31, 2023 and September 30, 2023, respectively	270,466	189,666
Total stockholders' equity	1,359,305	1,429,643	$ 1,412,772	$ 1,444,443
Total liabilities and stockholders' equity	2,288,728	2,365,554
Parent Company [Member]
Non-current assets:
Investments in subsidiaries	1,359,305	1,429,643
Total non-current assets	1,359,305	1,429,643
Total assets	1,359,305	1,429,643
Stockholders' equity:
Preferred stock, $0.001 par value; 1,000,000 shares authorized and no shares issued or outstanding at December 31, 2023 and September 30, 2023, respectively
Additional paid‑in capital	1,650,160	1,662,322
Accumulated deficit	(19,328)	(45,047)
Accumulated other comprehensive income (loss)	(1,217)	1,878
Treasury stock, at cost, 10,560,030 and 8,268,423 shares at December 31, 2023 and September 30, 2023, respectively	(270,466)	(189,666)
Total stockholders' equity	1,359,305	1,429,643
Total liabilities and stockholders' equity	1,359,305	1,429,643
Common Class A [Member]
Stockholders' equity:
Common stock value	156	156
Common Class A [Member] | Parent Company [Member]
Stockholders' equity:
Common stock value	$ 156	$ 156

Condensed Financial Informati_4

Condensed Financial Information of Registrant (Parent Company Only) - Schedule of Balance Sheets (Parenthetical) (Detail) - $ / shares	Dec. 31, 2023	Sep. 30, 2023
Preferred stock, par value per share	$ 0.001	$ 0.001
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, shares issued	156,341,203	155,967,736
Treasury stock, shares	10,560,030	8,268,423
Common Class A [Member]
Common stock, par value per share	$ 0.001	$ 0.001
Common stock, shares authorized	1,100,000,000	1,100,000,000
Common stock, shares issued	156,341,203	155,967,736
Common Class B [Member]
Common stock, par value per share	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	0	100
Common stock, shares outstanding	0	100
Parent Company [Member]
Preferred stock, par value per share	$ 0.001	$ 0.001
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Treasury stock, shares	10,560,030	8,268,423
Parent Company [Member] | Common Class A [Member]
Common stock, par value per share	$ 0.001	$ 0.001
Common stock, shares authorized	1,100,000,000	1,100,000,000
Parent Company [Member] | Common Class B [Member]
Common stock, par value per share	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	0	100
Common stock, shares outstanding	0	100

Condensed Financial Informati_5

Condensed Financial Information of Registrant (Parent Company Only) - Schedule of Statements of Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Condensed Statement of Income Captions [Line Items]
Comprehensive income (loss)	$ 22,624	$ (27,632)
Parent Company [Member]
Condensed Statement of Income Captions [Line Items]
Net income (loss) of subsidiaries	25,719	(25,836)
Comprehensive income (loss)	$ 22,624	$ (27,632)

Condensed Financial Informati_6

Condensed Financial Information of Registrant (Parent Company Only) - Additional Information (Detail) - Parent Company [Member] - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Condensed Statement of Income Captions [Line Items]
Minimum threshold percentage of restricted net assets	25%
Cash dividends paid	$ 100	$ 7.5