Arcosa (ACA) 10-Q31 Oct 242024 Q3 Quarterly reportFinancial data

Company Profile

Cover and DEI

Cover and DEI - shares	9 Months Ended
Cover and DEI - shares	Sep. 30, 2024	Oct. 15, 2024
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Entity File Number	1-38494
Entity Registrant Name	Arcosa, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	82-5339416
Entity Address, Address Line One	500 N. Akard Street, Suite 400
Entity Address, City or Town	Dallas,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75201
City Area Code	972
Local Phone Number	942-6500
Title of 12(b) Security	Common Stock ($0.01 par value)
Trading Symbol	ACA
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		48,776,818
Entity Central Index Key	0001739445
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31

Consolidated Statements of Oper

Consolidated Statements of Operations (unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Revenues	$ 640.4	$ 591.7	$ 1,903.7	$ 1,725.7
Operating costs:
Cost of revenues	503.7	484.6	1,517.4	1,388.9
Selling, general, and administrative expenses	82.4	61.3	231	194.5
Gains on disposition of property, plant, equipment, and other assets	(2.5)	(2.6)	(8.4)	(25.8)
(Gain) loss on sale of businesses	23	0	3.5	(6.4)
Impairment charge	0	0	5.8	0
Costs and Expenses, Total	606.6	543.3	1,749.3	1,551.2
Total operating profit	33.8	48.4	154.4	174.5
Interest expense	15.8	6.7	35.5	20.9
Other, net (income) expense	(1.1)	(1.3)	(0.7)	(5.8)
Income before income taxes	19.1	43	119.6	159.4
Provision for income taxes	2.5	7.5	18.2	27.3
Net income	$ 16.6	$ 35.5	$ 101.4	$ 132.1
Net income per common share:
Basic (in dollars per share)	$ 0.34	$ 0.73	$ 2.08	$ 2.71
Diluted (in dollars per share)	$ 0.34	$ 0.72	$ 2.07	$ 2.70
Weighted average number of shares outstanding:
Basic (in shares)	48.7	48.7	48.6	48.5
Diluted (in shares)	48.8	48.8	48.7	48.7
Dividends declared per common share	$ 0.05	$ 0.05	$ 0.15	$ 0.15

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 16.6	$ 35.5	$ 101.4	$ 132.1
Derivative financial instruments:
Unrealized gains (losses) arising during the period, net of tax expense (benefit)	0	0	0	0.2
Reclassification adjustments for (gains) losses included in net income, net of tax expense (benefit)	0	(0.6)	0	(1.4)
Currency translation adjustment:
Unrealized gains (losses) arising during the period, net of tax expense (benefit)	0.1	(0.1)	(0.5)	0.1
Other comprehensive income (loss)	0.1	(0.7)	(0.5)	(1.1)
Comprehensive income	$ 16.7	$ 34.8	$ 100.9	$ 131

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Unrealized gains (losses) arising during the period, tax expense (benefit)	$ 0	$ 0	$ 0	$ 0.1
Reclassification adjustments for (gains) losses included in net income, tax expense (benefit)	0	0.2	0	0.4
Unrealized gains (losses) arising during the period, tax expense (benefit)	$ 0	$ 0	$ 0	$ 0

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2024	[1]	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 756.8		$ 104.8
Receivables, net of allowance	396.4		357.1
Inventories:
Raw materials and supplies	158.7		210.8
Work in process	44.2		42.7
Finished goods	157.5		148.3
Total inventory	360.4		401.8
Other	46.1		48.3
Total current assets	1,559.7		912
Property, plant, and equipment, net	1,381.5		1,336.3
Goodwill	1,009.3		990.7
Intangibles, net	306.3		270.7
Deferred income taxes	6.8		6.8
Other assets	93.3		61.4
Total assets	4,356.9		3,577.9
Current liabilities:
Accounts payable	242.9		272.5
Accrued liabilities	156		117.4
Advance billings	29.3		34.5
Current portion of long-term debt	4.1		6.8
Total current liabilities	432.3		431.2
Debt	1,232.8		561.9
Deferred income taxes	198.4		179.6
Other liabilities	59.3		73.2
Total liabilities	1,922.8		1,245.9
Stockholders' equity:
Common stock	$ 0.5		$ 0.5
Common stock, shares authorized	200,000,000		200,000,000
Capital in excess of par value	$ 1,692.1		$ 1,682.8
Retained earnings	759		664.9
Accumulated other comprehensive loss	(16.7)		(16.2)
Treasury stock	(0.8)		0
Total stockholders' equity	2,434.1		2,332
Total liabilities and stockholders' equity	$ 4,356.9		$ 3,577.9

[1] (unaudited)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024		Sep. 30, 2023
Operating activities:
Net income	$ 101.4		$ 132.1
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion, and amortization	134.6		118.8
Impairment charge	5.8		0
Stock-based compensation expense	19		18.3
Provision for deferred income taxes	14.7		14
Gains on disposition of property, plant, equipment, and other assets	(8.4)		(25.8)
(Gain) loss on sale of businesses	3.5		(6.4)
(Increase) decrease in other assets	(1.9)		(3.5)
Increase (decrease) in other liabilities	(16.4)		(6.2)
Other	(3.8)		1.3
Changes in current assets and liabilities:
(Increase) decrease in receivables	(45.5)		(34.6)
(Increase) decrease in inventories	33.1		(40.4)
(Increase) decrease in other current assets	3.7		1
Increase (decrease) in accounts payable	(24.8)		49.5
Increase (decrease) in advance billings	(4.1)		(4.1)
Increase (decrease) in accrued liabilities	42.9		(15.2)
Net cash provided by operating activities	253.8		198.8
Investing activities:
Proceeds from disposition of property, plant, equipment, and other assets	14		30.1
Proceeds from sale of businesses	86.4		2
Capital expenditures	(136.4)		(144.8)
Acquisitions, net of cash acquired	(214.6)		(18.8)
Net cash required by investing activities	(250.6)		(131.5)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Payments to retire debt	(260.2)		(142)
Proceeds from issuance of debt	935		100
Dividends paid to common stockholders	(7.3)		(7.3)
Purchase of shares to satisfy employee tax on vested stock	(10.5)		(11.1)
Debt issuance costs	(8.2)		(2)
Payment for Contingent Consideration Liability, Financing Activities	0		(10)
Net cash provided (required) by financing activities	648.8		(72.4)
Net increase (decrease) in cash and cash equivalents	652		(5.1)
Cash and cash equivalents at beginning of period	104.8		160.4
Cash and cash equivalents at end of period	$ 756.8	[1]	$ 155.3

[1] (unaudited)

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity (unaudited) - USD ($) shares in Millions, $ in Millions	Total		Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock, Common
Beginning balance at Dec. 31, 2022	$ 2,184.4		$ 0.5	$ 1,684.1	$ 515.5	$ (15.7)	$ 0
Beginning balance, shares at Dec. 31, 2022			48.4				0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	132.1				132.1
Other comprehensive income (loss)	(1.1)					(1.1)
Dividends paid to common stockholders	(7.3)				(7.3)
Restricted shares, net - shares			0.5				(0.1)
Restricted shares, net - value	7.2			19			$ (11.8)
Ending balance at Sep. 30, 2023	2,315.3		$ 0.5	1,691.5	640.3	(16.8)	$ (0.2)
Ending balance, shares at Sep. 30, 2023			48.8				0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Retirement of treasury stock - value	0			11.6			$ 11.6
Retirement of treasury stock - shares			0.1				0.1
Beginning balance at Jun. 30, 2023	2,277.3		$ 0.5	1,685.6	607.3	(16.1)	$ 0
Beginning balance, shares at Jun. 30, 2023			48.8				0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	35.5				35.5
Other comprehensive income (loss)	(0.7)					(0.7)
Dividends paid to common stockholders	(2.5)				(2.5)
Restricted shares, net - shares			0				0
Restricted shares, net - value	5.7			5.9			$ (0.2)
Ending balance at Sep. 30, 2023	2,315.3		$ 0.5	1,691.5	640.3	(16.8)	$ (0.2)
Ending balance, shares at Sep. 30, 2023			48.8				0
Beginning balance at Dec. 31, 2023	2,332		$ 0.5	1,682.8	664.9	(16.2)	$ 0
Beginning balance, shares at Dec. 31, 2023			48.6				0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	101.4				101.4
Other comprehensive income (loss)	(0.5)					(0.5)
Dividends paid to common stockholders	(7.3)				(7.3)
Restricted shares, net - shares			0.3				(0.1)
Restricted shares, net - value	8.5			20.2			$ (11.7)
Ending balance at Sep. 30, 2024	2,434.1	[1]	$ 0.5	1,692.1	759	(16.7)	$ (0.8)
Ending balance, shares at Sep. 30, 2024			48.8				0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Retirement of treasury stock - value	0			10.9			$ 10.9
Retirement of treasury stock - shares			0.1				0.1
Beginning balance at Jun. 30, 2024	2,415		$ 0.5	1,686.5	744.8	(16.8)	$ 0
Beginning balance, shares at Jun. 30, 2024			48.8				0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	16.6				16.6
Other comprehensive income (loss)	0.1					0.1
Dividends paid to common stockholders	(2.4)				(2.4)
Restricted shares, net - shares			0				0
Restricted shares, net - value	4.8			5.6			$ (0.8)
Ending balance at Sep. 30, 2024	$ 2,434.1	[1]	$ 0.5	$ 1,692.1	$ 759	$ (16.7)	$ (0.8)
Ending balance, shares at Sep. 30, 2024			48.8				0
Statement of Stockholders' Equity [Abstract]
Common Stock, Par or Stated Value Per Share	$ 0.01

[1] (unaudited)

Overview and Summary of Signifi

Overview and Summary of Significant Accounting Policies	9 Months Ended
Overview and Summary of Significant Accounting Policies	Sep. 30, 2024
Accounting Policies [Abstract]
Overview and Summary of Significant Accounting Policies	Overview and Summary of Significant Accounting Policies Basis of Presentation Arcosa, Inc. and its consolidated subsidiaries (“Arcosa,” the “Company,” “we,” or “our”), headquartered in Dallas, Texas, is a provider of infrastructure-related products and solutions with leading positions in construction, engineered structures, and transportation markets in North America. Arcosa is a Delaware corporation and was incorporated in 2018 as an independent, publicly-traded company, listed on the New York Stock Exchange. The accompanying Consolidated Financial Statements are unaudited and have been prepared from the books and records of Arcosa, Inc. and its consolidated subsidiaries. All normal and recurring adjustments necessary for a fair presentation of the financial position of the Company and the results of operations, comprehensive income/loss, and cash flows have been made in conformity with accounting principles generally accepted in the U.S. (“GAAP”). All significant intercompany accounts and transactions have been eliminated. Because of seasonal and other factors, the financial condition and results of operations for the three and nine months ended September 30, 2024 may not be indicative of Arcosa's expected business, financial condition, and results of operations for the year ending December 31, 2024. These interim financial statements and notes are condensed as permitted by the instructions to Form 10-Q and should be read in conjunction with the audited Consolidated Financial Statements of the Company included in its Annual Report on Form 10-K for the year ended December 31, 2023. Stockholders' Equity In December 2022, the Company’s Board of Directors (the “Board") authorized a new $50.0 million share repurchase program effective January 1, 2023 through December 31, 2024 to replace a program of the same amount that expired on December 31, 2022. For the three and nine months ended September 30, 2024, the Company did not repurchase any shares. As of September 30, 2024, the Company had a remaining authorization of $36.2 million under the program. Revenue Recognition Revenue is measured based on the allocation of the transaction price in a contract to satisfied performance obligations. The transaction price does not include any amounts collected on behalf of third parties. The Company recognizes revenue when it satisfies a performance obligation by transferring control over a product or service to a customer. The following is a description of principal activities from which the Company generates its revenue, separated by reportable segments. Payments for our products and services are generally due within normal commercial terms. For a further discussion regarding the Company’s reportable segments, see Note 4 Segment Information. Construction Products The Construction Products segment recognizes substantially all revenue when the customer has accepted the product and legal title of the product has passed to the customer. Engineered Structures Within the Engineered Structures segment, revenue is recognized for wind towers and certain utility structures over time as the products are manufactured using an input approach based on the costs incurred relative to the total estimated costs of production. We recognize revenue over time for these products as they are highly customized to the needs of an individual customer resulting in no alternative use to the Company if not purchased by the customer after the contract is executed. In addition, we have the right to bill the customer for our work performed to date plus at least a reasonable profit margin for work performed. As of September 30, 2024, we had a contract asset of $77.3 million related to these contracts, compared to $66.8 million as of December 31, 2023, which is included in receivables, net of allowance, within the Consolidated Balance Sheets. The increase in the contract asset is attributed to timing of deliveries of finished structures to customers during the period. For all other products, revenue is recognized when the customer has accepted the product and legal title of the product has passed to the customer. Transportation Products The Transportation Products segment recognizes revenue when the customer has accepted the product and legal title of the product has passed to the customer. Unsatisfied Performance Obligations The following table includes estimated revenue expected to be recognized in future periods related to performance obligations that are unsatisfied or partially satisfied as of September 30, 2024 and the percentage of the outstanding performance obligations as of September 30, 2024 expected to be delivered during the remainder of 2024: Unsatisfied performance obligations as of September 30, 2024 Total Percent expected to be delivered in 2024 (in millions) Engineered Structures: Utility, wind, and related structures $ 1,264.6 20 % Transportation Products: Inland barges $ 244.7 32 % Of the remaining unsatisfied performance obligations for utility, wind, and related structures, 47% are expected to be delivered during 2025 with the remainder expected to be delivered through 2028. All of the remaining unsatisfied performance obligations for inland barges are expected to be delivered during 2025. Income Taxes The liability method is used to account for income taxes. Deferred income taxes represent the tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Valuation allowances reduce deferred tax assets to an amount that will more likely than not be realized. The Company regularly evaluates the likelihood of realization of tax benefits derived from positions it has taken in various federal and state filings after consideration of all relevant facts, circumstances, and available information. For those tax positions that are deemed more likely than not to be sustained, the Company recognizes the benefit it believes is cumulatively greater than 50% likely to be realized. To the extent the Company were to prevail in matters for which accruals have been established or be required to pay amounts in excess of recorded reserves, the effective tax rate in a given financial statement period could be materially impacted. Financial Instruments The Company considers all highly liquid debt instruments to be cash and cash equivalents if purchased with a maturity of three months or less. Financial instruments that potentially subject the Company to a concentration of credit risk are primarily cash investments and receivables. The Company places its cash investments in bank deposits and highly-rated money market funds, and its investment policy limits the amount of credit exposure to any one commercial issuer. We seek to limit concentrations of credit risk with respect to receivables with control procedures that monitor the credit worthiness of customers, together with the large number of customers in the Company's customer base and their dispersion across different industries and geographic areas. As receivables are generally unsecured, the Company maintains an allowance for doubtful accounts based upon the expected credit losses. Receivable balances determined to be uncollectible are charged against the allowance. To accelerate the conversion to cash, the Company may sell a portion of its trade receivables to third parties. The Company has no recourse to these receivables once they are sold but may have continuing involvement related to servicing and collection activities. The impact of these transactions in the Company's Consolidated Statements of Operations for the three and nine months ended September 30, 2024 was not significant. The carrying values of cash, receivables, and accounts payable are considered to be representative of their respective fair values. Derivative Instruments The Company may, from time to time, use derivative instruments to mitigate the impact of changes in interest rates, commodity prices, or changes in foreign currency exchange rates. For derivative instruments designated as hedges, the Company formally documents the relationship between the derivative instrument and the hedged item, as well as the risk management objective and strategy for the use of the derivative instrument. This documentation includes linking the derivative to specific assets or liabilities on the balance sheet, commitments, or forecasted transactions. At the time a derivative instrument is entered into, and at least quarterly thereafter, the Company assesses whether the derivative instrument is effective in offsetting the changes in fair value or cash flows of the hedged item. Any change in the fair value of the hedged instrument is recorded in accumulated other comprehensive loss (“AOCL”) as a separate component of stockholders' equity and reclassified into earnings in the period during which the hedged transaction affects earnings. When derivative instruments are in place, the Company monitors its positions and the credit ratings of its counterparties to mitigate the risk of loss due to counterparties' non-performance. Recent Accounting Pronouncements Recently adopted accounting pronouncements Effective January 1, 2024, the Company adopted Accounting Standards Update No. 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures” (“ASU 2023-07”), which is intended to improve reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. The Company will adopt additional disclosure requirements within its annual reporting for the year ending December 31, 2024 and its interim reporting for the quarter ending March 31, 2025. Recently issued accounting pronouncements not adopted as of September 30, 2024 In December 2023, the FASB issued Accounting Standards Update No. 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures” (“ASU 2023-09”), which is intended to improve the transparency of income tax disclosures by requiring 1) consistent categories and greater disaggregation of information in the rate reconciliation and 2) income taxes paid disaggregated by jurisdiction. The standard also includes certain other amendments to improve the effectiveness of income tax disclosures. ASU 2023-09 will become effective for public companies during annual reporting periods beginning after December 15, 2024, with early adoption permitted. Although ASU 2023-09 only modifies the Company's required income tax disclosures, the Company is currently evaluating the impact of adopting this guidance on its Consolidated Financial Statements.

Acquisitions and Divestitures

Acquisitions and Divestitures	9 Months Ended
Acquisitions and Divestitures	Sep. 30, 2024
Business Combinations [Abstract]
Acquisitions and Divestitures	Acquisitions and Divestitures 2024 Acquisitions On October 1, 2024, we completed the acquisition of the construction materials business of Stavola Holding Corporation and its affiliated entities ("Stavola") for $1.2 billion in cash, subject to certain customary purchase price adjustments. Stavola, which will be reported within the Construction Products segment, is an aggregates-led and vertically integrated construction materials company primarily serving the New York-New Jersey Metropolitan Statistical Area ("MSA") through its network of five hard rock natural aggregates quarries, twelve asphalt plants, and three recycled aggregates sites. We are currently in the process of finalizing the accounting for this transaction and expect to complete the preliminary allocation of the purchase consideration in the fourth quarter of 2024. The acquisition was financed with a combination of a $600 million issuance of fixed-rate senior unsecured notes that closed in August 2024 following the announcement of the acquisition and a $700 million borrowing of a variable-rate secured term loan that closed on October 1, 2024 concurrent with the completion of the acquisition. See Note 7 Debt for additional information. In July 2024, we completed the acquisition of a Phoenix, Arizona based natural aggregates business in our Con struction Products segment, for a total purchase price of $35.0 million . In April 2024, we completed the acquisition of Ameron Pole Products LLC ("Ameron"), a leading manufacturer of highly engineered, premium concrete and steel poles for a broad range of infrastructure applications, including lighting, traffic, electric distribution, and small-cell telecom, for a total purchase price of $180.0 million. With operations in Alabama, California, and Oklahoma, Ameron is included in our Engineered Structures segment. The acquisition was funded with $160.0 million of borrowings under our revolving credit facility and cash on hand. The acquisition was recorded as a business combination based on a preliminary valuation of the assets acquired and liabilities assumed at their acquisition date fair value using unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets and liabilities ("Level 3" inputs). The preliminary valuation resulted in the recognition of, among others, $56.5 million of property, plant, and equipment, $27.1 million of customer relationships, $18.1 million of inventory, $12.8 million of technology, $12.0 million of accounts receivable, $8.9 million of trademarks and $42.8 million of goodwill in our Engineered Structures segment. The goodwill acquired, which is tax-deductible, primarily relates to Ameron's market position and existing workforce. We expect to complete our purchase price allocation as soon as reasonably possible, not to exceed one year from the acquisition date. Adjustments to the preliminary purchase price allocation could be material, particularly with respect to our preliminary estimates of property, plant, and equipment, customer relationships, and technology. 2023 Acquisitions In December 2023, we completed the acquisition of certain assets and liabilities of Lake Point Holdings, LLC and Lake Point Restoration LLC, (collectively "Lake Point") a Florida based natural aggregates business in our Construction Products segment, for a total purchase price of $65.1 million. The acquisition was funded with $60.0 million of borrowings under our revolving credit facility and cash on hand. The acquisition was recorded as a business combination based on a valuation of the assets acquired and liabilities assumed at their acquisition date fair value using Level 3 inputs. The preliminary valuation resulted in the recognition of, among others, $13.2 million of property, plant, and equipment, $19.1 million of mineral reserves, $11.5 million of permits, and $15.4 million of goodwill in our Construction Products segment. We expect to complete our purchase price allocation as soon as reasonably possible, not to exceed one year from the acquisition date. Adjustments to the preliminary purchase price allocation could be material, particularly with respect to our preliminary estimates of mineral reserves, permits, and property, plant, and equipment. In October 2023, we completed the acquisition of certain assets and liabilities of a Phoenix, Arizona based recycled aggregates business and the acquisition of certain assets and liabilities of a Florida based recycled aggregates business in our Construction Products segment. The purchase prices of these acquisitions were not significant. In September 2023, we completed the acquisition of certain assets and liabilities of a Houston, Texas based stabilized sand producer in our Construction Products segment. The purchase price of the acquisition was not significant. In March 2023, we completed the stock acquisition of a Houston, Texas based shoring, trench, and excavation products business in our Construction Products segment. In February 2023, we completed the acquisition of certain assets and liabilities of a Phoenix, Arizona based recycled aggregates business in our Construction Products segment. The purchase prices of these acquisitions were not significant. Divestitures On August 16, 2024, the Company completed the sale of its steel components business. The steel components business, previously reported in the Transportation Products segment, is a leading supplier of railcar coupling devices, railcar axles, and circular forgings. The total consideration for the divestiture was $110.0 million consisting of $55.0 million in cash, a $25.0 million seller's note and a $30.0 million earnout of which the estimated fair value as of September 30, 2024 was $14.1 million. See Note 3 Fair Value Accounting. During the three months ended September 30, 2024, the Company recognized a loss of $23.0 million on the sale of the business which is reflected in (gain) loss on sale of businesses on the Consolidated Statement of Operations. Revenues and operating profit (loss) of the steel components business were $87.8 million and $(20.9) million, respectively, for the nine months ended September 30, 2024, $117.6 million and $8.1 million, respectively, for the nine months ended September 30, 2023. During the three months ended June 30, 2024, we completed the divestiture of certain assets and liabilities of a single-location asphalt and paving operation in our Construction Products segment and the sale of a non-operating facility in our Engineered Structures segment. The total consideration for these divestitures was $27.3 million. The Company recognized a net pre-tax gain of $12.5 million which is reflected in (gain) loss on sale of businesses on the Consolidated Statement of Operations. There were no divestitures completed during the three and nine months ended September 30, 2023. Other In June 2023, the Company settled a $15.0 million holdback obligation from the 2021 acquisition of Southwest Rock Products, LLC upon the extension of a certain mineral reserve lease. Based on final negotiations with the seller, the holdback was settled for $10.0 million and paid during the three months ended June 30, 2023. The $5.0 million difference between the settlement amount and the amount accrued at the time of acquisition was recorded as a reduction in cost of revenues in the Consolidated Statement of Operations.

Fair Value Accounting

Fair Value Accounting	9 Months Ended
Fair Value Accounting	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value Accounting	Fair Value Accounting Assets and liabilities measured at fair value on a recurring basis are summarized below: Fair Value Measurement as of September 30, 2024 Level 1 Level 2 Level 3 Total (in millions) Assets: Contingent consideration (1) $ — $ — $ 14.1 $ 14.1 Total assets $ — $ — $ 14.1 $ 14.1 Liabilities: Contingent consideration (2) $ — $ — $ 1.4 $ 1.4 Total liabilities $ — $ — $ 1.4 $ 1.4 Fair Value Measurement as of December 31, 2023 Level 1 Level 2 Level 3 Total (in millions) Liabilities: Contingent consideration (2) $ — $ — $ 2.7 $ 2.7 Total liabilities $ — $ — $ 2.7 $ 2.7 (1) Included in other assets on the Consolidated Balance Sheets. (2) Included in accrued liabilities on the Consolidated Balance Sheets. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for that asset or liability in an orderly transaction between market participants on the measurement date. An entity is required to establish a fair value hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs when measuring fair value. The three levels of inputs that may be used to measure fair values are listed below: Level 1 – This level is defined as quoted prices in active markets for identical assets or liabilities. The Company’s cash equivalents are instruments of the U.S. Treasury or highly-rated money market mutual funds. Level 2 – This level is defined as observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Interest rate hedges are valued at exit prices obtained from each counterparty. See Note 7 Debt. Level 3 – This level is defined as unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Contingent consideration relates to estimated future payments expected from businesses previously acquired or sold. We estimate the fair value of the contingent consideration using a model appropriate for the structure of the contingent consideration, which may include discounted cash flow models, Monte Carlo simulations, or option pricing models. The fair values are sensitive to changes in the forecast of the performance metrics and in other metrics such as discount rates and volatility. The fair value is reassessed quarterly based on assumptions used in our latest projections.

Segment Information

Segment Information	9 Months Ended
Segment Information	Sep. 30, 2024
Segment Reporting [Abstract]
Segment Information	Segment Information The Company reports operating results in three principal business segments: Construction Products. The Construction Products segment primarily produces and sells natural and recycled aggregates, specialty materials, and construction site support equipment, including trench shields and shoring products. Engineered Structures. The Engineered Structures segment primarily manufactures and sells steel and concrete structures for infrastructure businesses, including utility structures for electricity transmission and distribution, structural wind towers, traffic and lighting structures, and telecommunication structures. These products share similar manufacturing competencies and steel sourcing requirements and can be manufactured across our North American footprint. Transportation Products. The Transportation Products segment primarily manufactures and sells inland barges, fiberglass barge covers, winches, marine hardware, and steel components for railcars and other transportation and industrial equipment. In August 2024, the Company completed the sale of its steel components business. See Note 2 Acquisitions and Divestitures. The financial information for these segments is shown in the tables below. We operate principally in North America. Three Months Ended September 30, Revenues Operating Profit (Loss) 2024 2023 2024 2023 (in millions) Aggregates and specialty materials $ 233.6 $ 227.8 Construction site support 32.3 34.3 Construction Products 265.9 262.1 $ 40.4 $ 30.3 Utility, wind, and related structures 279.4 222.5 Engineered Structures 279.4 222.5 32.6 18.7 Inland barges 81.5 67.3 Steel components 13.6 39.8 Transportation Products 95.1 107.1 (14.2) 14.1 Segment Totals 640.4 591.7 58.8 63.1 Corporate — — (25.0) (14.7) Consolidated Total $ 640.4 $ 591.7 $ 33.8 $ 48.4 Nine Months Ended September 30, Revenues Operating Profit (Loss) 2024 2023 2024 2023 (in millions) Aggregates and specialty materials $ 690.8 $ 665.9 Construction site support 102.4 97.1 Construction Products 793.2 763.0 $ 108.6 $ 114.2 Utility, wind, and related structures 785.8 637.2 Engineered Structures 785.8 637.2 94.0 70.3 Inland barges 236.9 207.9 Steel components 87.8 117.6 Transportation Products 324.7 325.5 13.0 35.8 Segment Totals 1,903.7 1,725.7 215.6 220.3 Corporate — — (61.2) (45.8) Consolidated Total $ 1,903.7 $ 1,725.7 $ 154.4 $ 174.5

Property, Plant, and Equipment

Property, Plant, and Equipment	9 Months Ended
Property, Plant, and Equipment	Sep. 30, 2024
Property, Plant and Equipment [Abstract]
Property, Plant, and Equipment	Property, Plant, and Equipment The following table summarizes the components of property, plant, and equipment as of September 30, 2024 and December 31, 2023. September 30, December 31, (in millions) Land $ 145.0 $ 140.2 Mineral reserves 561.6 546.9 Buildings and improvements 357.6 345.6 Machinery and other 1,106.9 1,121.0 Construction in progress 93.0 115.5 2,264.1 2,269.2 Less accumulated depreciation and depletion (882.6) (932.9) $ 1,381.5 $ 1,336.3

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
Goodwill and Other Intangible Assets	Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill Goodwill by segment is as follows: September 30, December 31, (in millions) Construction Products $ 509.1 $ 516.1 Engineered Structures 480.3 437.6 Transportation Products 19.9 37.0 $ 1,009.3 $ 990.7 The decrease in Construction Products goodwill during the nine months ended September 30, 2024 is due to measurement period adjustments from the 2023 acquisitions and the divestiture of a single-location asphalt and paving business completed in April 2024. The increase in Engineered Structures goodwill during the nine months ended September 30, 2024 is due to the acquisition of Ameron. The decrease in Transportation Products goodwill during the nine months ended September 30, 2024 is due to the divestiture of the steel components business in August 2024. See Note 2 Acquisitions and Divestitures. Intangible Assets Intangibles, net consisted of the following: September 30, December 31, (in millions) Intangibles with indefinite lives - Trademarks $ 43.8 $ 34.9 Intangibles with definite lives: Customer relationships 171.3 142.7 Permits 169.4 166.9 Other 16.9 2.3 357.6 311.9 Less accumulated amortization (95.1) (76.1) 262.5 235.8 Intangible assets, net $ 306.3 $ 270.7

Debt

Debt	9 Months Ended
Debt	Sep. 30, 2024
Debt Disclosure [Abstract]
Debt	Debt The following table summarizes the components of debt as of September 30, 2024 and December 31, 2023: September 30, December 31, (in millions) Secured revolving credit facility $ 240.0 $ 160.0 2021 Senior Notes - 4.375% due April 2029 400.0 400.0 2024 Senior Notes - 6.875% due August 2032 600.0 — Finance leases (see Note 8 Leases) 8.7 13.1 1,248.7 573.1 Less: unamortized debt issuance costs (11.8) (4.4) Total debt $ 1,236.9 $ 568.7 Revolving Credit Facility In August 2023, we entered into a Second Amended and Restated Credit Agreement (the "Credit Agreement") to increase our revolving credit facility from $500.0 million to $600.0 million, extend the maturity date of our revolving credit facility from January 2, 2025 to August 23, 2028, and refinance and repay in full the remaining balance of the term loan then outstanding under our prior credit facility. On August 15, 2024, we entered into an amendment to the Credit Agreement (the "Amended Credit Agreement") to, among other things, (i) increase our revolving credit facility from $600.0 million to $700.0 million, (ii) collateralize the amended revolving credit facility with substantially all of our and our subsidiary guarantors' personal property (with certain exceptions), (iii) make the applicable margin for revolving borrowings, letters of credit and the commitment fee rate be based on our consolidated net leverage ratio (permitting up to $150.0 million of unrestricted cash to be netted from the calculation thereof), (iv) modify the margin for SOFR-based revolving borrowings and letters of credit to range from 1.25% to 2.50% per annum, (v) modify the margin for base rate revolving borrowings to range from 0.25% to 1.50%, (vi) modify the commitment fee that accrues on the unused portion of the revolving credit facility to range from 0.20% to 0.45%, and (vii) modify the maximum permitted leverage to include a net debt concept (permitting up to $150.0 million of unrestricted cash to be netted from the calculation thereof), and to provide that such ratio shall be no greater than 5.00 to 1.00 during the fourth quarter of 2024 and the next two fiscal quarters, 4.50 to 1.00 for the next following two fiscal quarters, and 4.00 to 1.00 for each fiscal quarter thereafter (however, this maximum permitted leverage ratio may be increased to 4.50 to 1.00 for up to four fiscal quarters if a material acquisition is entered into). These amendments did not become effective until the closing of the Stavola acquisition on October 1, 2024. The amended revolving credit facility's maturity date of August 23, 2028 remains unchanged. As of September 30, 2024, we had $240.0 million of outstanding loans borrowed under our revolving credit facility. During the nine months ended September 30, 2024, the amount of outstanding loans borrowed increased $80.0 million primarily due to $160.0 million borrowed in April 2024 to fund, in part, the acquisition of Ameron, of which $60.0 million was repaid during the three months ended June 30, 2024. Additionally, as of September 30, 2024, prior to the effectiveness of the Amended Credit Agreement, there were approximately $0.7 million of letters of credit outstanding under our revolving credit facility that will expire in 2025, which left $359.3 million available for borrowing. The majority of our letters of credit obligations support the Company’s various insurance programs and generally renew by their terms each year. The interest rate for revolving loans under the Amended Credit Agreement are variable based on the daily simple or term Secured Overnight Financing Rate ("SOFR"), plus 10-basis points, or an alternate base rate, in each case plus a margin for borrowing. A commitment fee accrues on the average daily unused portion of the revolving credit facility. The margin for revolving borrowings and commitment fee rate are determined based on the Company’s Consolidated Total Net Leverage Ratio (as measured by a consolidated funded indebtedness, less the aggregate amount of unrestricted cash up to a maximum amount not to exceed $150.0 million, to consolidated EBITDA ratio). As of September 30, 2024, prior to the effectiveness of the Amended Credit Agreement, the margin for borrowing based on SOFR was set at 1.50% and the commitment fee rate was set at 0.25%. The revolving credit facility portion of the Amended Credit Agreement requires the maintenance of certain ratios related to leverage and interest coverage. As of September 30, 2024, we were in compliance with all such financial covenants. Borrowings under the Credit Agreement are guaranteed by certain domestic subsidiaries of the Company. On October 1, 2024, we collateralized our obligations under the Amended Credit Agreement with substantially all of our and our subsidiary guarantors' personal property (with certain exceptions). The carrying value of revolving borrowings under the Credit Agreement approximates fair value because the interest rate adjusts to the market interest rate (Level 3 input). See Note 3 Fair Value Accounting. In connection with the Credit Agreement, the Company incurred debt issuance costs of approximately $0.2 million. As of September 30, 2024, total unamortized debt issuance costs related to the prior and amended revolving credit facilities were $2.2 million. These costs are included in other assets on the Consolidated Balance Sheet and are amortized into interest expense over the term of the Amended Credit Agreement. Term Loan The Amended Credit Agreement provides for a new secured term loan facility (the “Term Loan”) in an aggregate principal amount of $700.0 million. The Term Loan was funded on October 1, 2024 with the closing of the Stavola acquisition, of which $100.0 million was used to pay down the Company's revolving credit facility. The Term Loan requires, among other things, (i) mandatory prepayments from excess cash flow on an annual basis, commencing with the fiscal year ending December 31, 2025, (ii) mandatory prepayments with proceeds of certain asset sales and debt issuances, and (iii) quarterly principal amortization payments in an amount equal to 0.25% of the initial Term Loan. The Term Loan has a maturity date of October 1, 2031. The interest rate for the Term Loan is based on SOFR plus 2.25% per year. The Term Loan is prepayable at any time without penalty, except, in the event of a voluntary repricing in the first six months after closing, in which case a premium in the amount of 1.0% of the initial Term Loan is payable. The Term Loan is guaranteed by the same subsidiaries of the Company, that guarantee our revolving credit facility, and the Term Loan is secured on a pari passu basis with our revolving credit facility. Senior Notes On August 26, 2024, the Company issued $600.0 million aggregate principal amount of 6.875% senior unsecured notes (the "2024 Notes") that mature in August 2032. Interest on the 2024 Notes is payable semiannually in February and August. In April 2021, the Company issued $400.0 million aggregate principal amount of 4.375% senior unsecured notes (the "2021 Notes", and together with the 2024 Notes, the "Senior Notes") that mature in April 2029. Interest on the 2021 Notes is payable semiannually in April and October. The Senior Notes are senior unsecured obligations of the Company and are guaranteed on a senior unsecured basis by each of the Company’s domestic subsidiaries that is a guarantor under our Amended Credit Agreement. The terms of each indenture governing the Senior Notes, among other things, limit the ability of the Company and each of its subsidiaries to create liens on assets, enter into sale and leaseback transactions, and consolidate, merge or transfer all or substantially all of its assets and the assets of its subsidiaries. The terms of each indenture also limit the ability of the Company’s non-guarantor subsidiaries to incur certain types of debt. The Company has the option to redeem all or a portion of the Senior Notes at redemption prices set forth in the applicable indenture, plus accrued and unpaid interest to the redemption date. If a Change of Control Triggering Event (as defined in each applicable indenture) occurs, the Company must offer to repurchase the Senior Notes at a price equal to 101% of the principal amount of the Senior Notes, plus accrued and unpaid interest to the date of repurchase. The estimated fair values of the 2024 Notes and 2021 Notes as of September 30, 2024 were $628.6 million and $383.9 million , respectively, based on quoted market prices in a market with little activity (Level 2 input). In connection with the issuance of the 2024 Notes and the 2021 Notes, the Company incurred $8.1 million and $6.6 million, respectively, of debt issuance costs. The remaining principal payments under existing debt agreements as of September 30, 2024 are as follows (1) : 2024 2025 2026 2027 2028 Thereafter (in millions) Revolving credit facility $ — $ — $ — $ — $ 240.0 $ — 2021 Senior Notes - 4.375% due April 2029 — — — — — 400.0 2024 Senior Notes - 6.875% due August 2032 — — — — — 600.0 (1) The $700 million Term Loan was funded on October 1, 2024 concurrent with the closing of Stavola, of which $100 million was used to pay down the revolving credit facility. See Note 2 Acquisitions and Divestitures. In connection with the agreement to acquire Stavola, on August 1, 2024 the Company entered into a commitment letter with certain lenders to provide a senior secured 364-day bridge loan facility of up to $1.2 billion for the purpose of providing the financing necessary to fund the acquisition. No funds were drawn upon the bridge loan facility, which terminated upon the closing of the Stavola acquisition. During the three months ended September 30, 2024, the Company incurred $1.5 million of debt issuance costs related to the bridge loan facility, all of which is reflected in interest expense on the Consolidated Statement of Operations. Interest rate hedges In December 2018, the Company entered into a $100.0 million interest rate swap instrument, effective as of January 2, 2019, to reduce the effect of changes in the variable interest rates associated with the first $100.0 million of borrowings under the Company's committed credit facility. In conjunction with the replacement of LIBOR with SOFR as a benchmark for borrowings under our credit facility, on July 1, 2023 the swap instrument transitioned from LIBOR to SOFR. The instrument effectively fixed the SOFR component of borrowings under our credit facility at a monthly rate of 2.71% until such instrument's termination. The interest rate swap instrument expired in October 2023 and no new interest rate swap instrument has been entered into in connection with the Term Loan.

Leases

Leases	9 Months Ended
Leases	Sep. 30, 2024
Leases [Abstract]
Leases	Leases We have various leases primarily for office space and certain equipment. At inception, we determine if an arrangement contains a lease and whether that lease meets the classification criteria of a finance or operating lease. For leases that contain options to purchase, terminate, or extend, such options are included in the lease term when it is reasonably certain that the option will be exercised. Some of our lease arrangements contain lease components and non-lease components which are accounted for as a single lease component as we have elected the practical expedient to group lease and non-lease components for all leases. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on information available at commencement date in determining the present value of lease payments. Future minimum lease payments for operating and finance lease obligations as of September 30, 2024 consisted of the following: Operating Leases Finance Leases (in millions) 2024 (remaining) $ 2.6 $ 1.8 2025 9.7 5.3 2026 7.6 1.5 2027 4.4 0.2 2028 2.8 — Thereafter 9.1 — Total undiscounted future minimum lease obligations 36.2 8.8 Less imputed interest (2.5) (0.1) Present value of net minimum lease obligations $ 33.7 $ 8.7 The following table summarizes our operating and finance leases and their classification within the Consolidated Balance Sheet. September 30, December 31, (in millions) Assets Operating - Other assets $ 31.7 $ 36.7 Finance - Property, plant, and equipment, net 13.2 16.5 Total lease assets 44.9 53.2 Liabilities Current Operating - Accrued liabilities 9.0 8.4 Finance - Current portion of long-term debt 5.9 6.8 Non-current Operating - Other liabilities 24.7 29.7 Finance - Debt 2.8 6.3 Total lease liabilities $ 42.4 $ 51.2

Other, Net

Other, Net	9 Months Ended
Other, Net	Sep. 30, 2024
Other Income and Expenses [Abstract]
Other, Net	Other, Net Other, net (income) expense consists of the following items: Three Months Ended Nine Months Ended 2024 2023 2024 2023 (in millions) Interest income $ (3.8) $ (1.7) $ (6.2) $ (4.3) Foreign currency exchange transactions 2.7 0.4 5.5 (1.3) Other — — — (0.2) Other, net (income) expense $ (1.1) $ (1.3) $ (0.7) $ (5.8)

Income Taxes

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For interim income tax reporting, we estimate our annual effective tax rate and apply it to our year-to-date ordinary income (loss). Tax jurisdictions with a projected or year to date loss for which a tax benefit cannot be realized are excluded. The tax effects of unusual or infrequently occurring items, including changes in judgment about valuation allowances and effects of changes in tax laws or rates, are reported in the interim period in which they occur. We have open tax years from 2014 to 2023 with various significant tax jurisdictions. Our effective tax rates of 13.1% and 15.2% for the three and nine months ended September 30, 2024, respectively, differed from the U.S. federal statutory rate of 21.0% due to Advanced Manufacturing Production ("AMP") tax credits, compensation-related items, state income taxes, statutory depletion deductions, and tax effects of foreign currency translations. Our effective tax rates of 17.4% and 17.1% for the three and nine months ended September 30, 2023, respectively, differed from the U.S. federal statutory rate of 21.0% due to AMP tax credits, tax effects of foreign currency translations, compensation-related items, state income taxes, and statutory depletion deductions.

Employee Retirement Plans

Employee Retirement Plans	9 Months Ended
Employee Retirement Plans	Sep. 30, 2024
Retirement Benefits [Abstract]
Employee Retirement Plans	Employee Retirement Plans Total employee retirement plan expense, which includes related administrative expenses, is as follows: Three Months Ended Nine Months Ended 2024 2023 2024 2023 (in millions) Defined contribution plans $ 4.3 $ 3.9 $ 12.9 $ 11.6 Multiemployer plan 0.4 0.4 1.2 1.2 $ 4.7 $ 4.3 $ 14.1 $ 12.8 The Company contributes to a multiemployer defined benefit plan under the terms of a collective-bargaining agreement that covers certain union-represented employees at one of the facilities of Meyer Utility Structures, a subsidiary of Arcosa. The Company contributed $0.5 million and $1.3 million to the multiemployer plan for the three and nine months ended September 30, 2024, respectively. The Company contributed $0.4 million and $1.1 million to the multiemployer plan for the three and nine months ended September 30, 2023, respectively. Total contributions to this plan for 2024 are expected to be approximately $1.7 million.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	9 Months Ended
Accumulated Other Comprehensive Loss	Sep. 30, 2024
Equity [Abstract]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Changes in accumulated other comprehensive loss for the nine months ended September 30, 2024 and 2023 are as follows: Currency Unrealized Accumulated (in millions) Balances at December 31, 2022 $ (17.0) $ 1.3 $ (15.7) Other comprehensive income (loss), net of tax, before reclassifications 0.1 0.2 0.3 Amounts reclassified from accumulated other comprehensive loss, net of tax expense (benefit) of $0.0, $0.4, and $0.4 — (1.4) (1.4) Other comprehensive income (loss) 0.1 (1.2) (1.1) Balances at September 30, 2023 $ (16.9) $ 0.1 $ (16.8) Balances at December 31, 2023 $ (16.2) $ — $ (16.2) Other comprehensive income (loss), net of tax, before reclassifications (0.5) — (0.5) Amounts reclassified from accumulated other comprehensive loss, net of tax expense (benefit) of $0.0, $0.0, and $0.0 — — — Other comprehensive income (loss) (0.5) — (0.5) Balances at September 30, 2024 $ (16.7) $ — $ (16.7)

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
Stock-Based Compensation	Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]
Stock-Based Compensation	Stock-Based CompensationStock-based compensation totaled approximately $4.9 million and $19.0 million for the three and nine months ended September 30, 2024, respectively. Stock-based compensation totaled approximately $5.7 million and $18.3 million for the three and nine months ended September 30, 2023, respectively.

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
Earnings Per Common Share	Sep. 30, 2024
Earnings Per Share [Abstract]
Earnings per Common Share	Earnings Per Common Share Basic earnings per common share is computed by dividing net income remaining after allocation to participating unvested restricted shares by the weighted average number of basic common shares outstanding for the period. Except when the effect would be antidilutive, the calculation of diluted earnings per common share includes the weighted average net impact of nonparticipating unvested restricted shares. Total weighted average restricted shares were 1.1 million and 1.2 million for the three and nine months ended September 30, 2024. Total weighted average restricted shares were 1.1 million and 1.3 million for the three and nine months ended September 30, 2023, respectively. The computation of basic and diluted earnings per share follows. Three Months Ended Three Months Ended Income Average EPS Income Average EPS (in millions, except per share amounts) Net income $ 16.6 $ 35.5 Unvested restricted share participation — (0.1) Net income per common share – basic 16.6 48.7 $ 0.34 35.4 48.7 $ 0.73 Effect of dilutive securities: Nonparticipating unvested restricted shares — 0.1 — 0.1 Net income per common share – diluted $ 16.6 48.8 $ 0.34 $ 35.4 48.8 $ 0.72 Nine Months Ended Nine Months Ended Income Average EPS Income Average EPS (in millions, except per share amounts) Net income $ 101.4 $ 132.1 Unvested restricted share participation (0.3) (0.5) Net income per common share – basic 101.1 48.6 $ 2.08 131.6 48.5 $ 2.71 Effect of dilutive securities: Nonparticipating unvested restricted shares — 0.1 — 0.2 Net income per common share – diluted $ 101.1 48.7 $ 2.07 $ 131.6 48.7 $ 2.70

Contingencies

Contingencies	9 Months Ended
Contingencies	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies The Company is involved in claims and lawsuits incidental to our business arising from various matters including commercial disputes, alleged product defect and/or warranty claims, intellectual property matters, personal injury claims, environmental issues, employment and/or workplace-related matters, and various governmental and environmental regulations. The Company evaluates its exposure to such claims and suits periodically and establishes accruals for these contingencies when probable losses can be reasonably estimated. At September 30, 2024, the reasonably possible losses and any related accruals for such matters were not significant. Estimates of liability arising from future proceedings, assessments, or remediation are inherently imprecise. Accordingly, there can be no assurance that we will not become involved in future litigation or other proceedings, including those related to the environment or, if we are found to be responsible or liable in any such litigation or proceeding, that such costs would not be material to the Company.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pay vs Performance Disclosure
Net income	$ 16.6	$ 35.5	$ 101.4	$ 132.1

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Sep. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Overview and Summary of Signi_2

Overview and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation Arcosa, Inc. and its consolidated subsidiaries (“Arcosa,” the “Company,” “we,” or “our”), headquartered in Dallas, Texas, is a provider of infrastructure-related products and solutions with leading positions in construction, engineered structures, and transportation markets in North America. Arcosa is a Delaware corporation and was incorporated in 2018 as an independent, publicly-traded company, listed on the New York Stock Exchange. The accompanying Consolidated Financial Statements are unaudited and have been prepared from the books and records of Arcosa, Inc. and its consolidated subsidiaries. All normal and recurring adjustments necessary for a fair presentation of the financial position of the Company and the results of operations, comprehensive income/loss, and cash flows have been made in conformity with accounting principles generally accepted in the U.S. (“GAAP”). All significant intercompany accounts and transactions have been eliminated. Because of seasonal and other factors, the financial condition and results of operations for the three and nine months ended September 30, 2024 may not be indicative of Arcosa's expected business, financial condition, and results of operations for the year ending December 31, 2024. These interim financial statements and notes are condensed as permitted by the instructions to Form 10-Q and should be read in conjunction with the audited Consolidated Financial Statements of the Company included in its Annual Report on Form 10-K for the year ended December 31, 2023.
Stockholders' Equity	Stockholders' Equity
Revenue Recognition	Revenue Recognition Revenue is measured based on the allocation of the transaction price in a contract to satisfied performance obligations. The transaction price does not include any amounts collected on behalf of third parties. The Company recognizes revenue when it satisfies a performance obligation by transferring control over a product or service to a customer. The following is a description of principal activities from which the Company generates its revenue, separated by reportable segments. Payments for our products and services are generally due within normal commercial terms. For a further discussion regarding the Company’s reportable segments, see Note 4 Segment Information. Construction Products The Construction Products segment recognizes substantially all revenue when the customer has accepted the product and legal title of the product has passed to the customer. Engineered Structures Within the Engineered Structures segment, revenue is recognized for wind towers and certain utility structures over time as the products are manufactured using an input approach based on the costs incurred relative to the total estimated costs of production. We recognize revenue over time for these products as they are highly customized to the needs of an individual customer resulting in no alternative use to the Company if not purchased by the customer after the contract is executed. In addition, we have the right to bill the customer for our work performed to date plus at least a reasonable profit margin for work performed. As of September 30, 2024, we had a contract asset of $77.3 million related to these contracts, compared to $66.8 million as of December 31, 2023, which is included in receivables, net of allowance, within the Consolidated Balance Sheets. The increase in the contract asset is attributed to timing of deliveries of finished structures to customers during the period. For all other products, revenue is recognized when the customer has accepted the product and legal title of the product has passed to the customer. Transportation Products The Transportation Products segment recognizes revenue when the customer has accepted the product and legal title of the product has passed to the customer. Unsatisfied Performance Obligations The following table includes estimated revenue expected to be recognized in future periods related to performance obligations that are unsatisfied or partially satisfied as of September 30, 2024 and the percentage of the outstanding performance obligations as of September 30, 2024 expected to be delivered during the remainder of 2024: Unsatisfied performance obligations as of September 30, 2024 Total Percent expected to be delivered in 2024 (in millions) Engineered Structures: Utility, wind, and related structures $ 1,264.6 20 % Transportation Products: Inland barges $ 244.7 32 % Of the remaining unsatisfied performance obligations for utility, wind, and related structures, 47%
Income Tax	Income Taxes The liability method is used to account for income taxes. Deferred income taxes represent the tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Valuation allowances reduce deferred tax assets to an amount that will more likely than not be realized. The Company regularly evaluates the likelihood of realization of tax benefits derived from positions it has taken in various federal and state filings after consideration of all relevant facts, circumstances, and available information. For those tax positions that are deemed more likely than not to be sustained, the Company recognizes the benefit it believes is cumulatively greater than 50% likely to be realized. To the extent the Company were to prevail in matters for which accruals have been established or be required to pay amounts in excess of recorded reserves, the effective tax rate in a given financial statement period could be materially impacted.
Cash and Cash Equivalents	Financial Instruments
Concentration of Credit Risk	Financial instruments that potentially subject the Company to a concentration of credit risk are primarily cash investments and receivables. The Company places its cash investments in bank deposits and highly-rated money market funds, and its investment policy limits the amount of credit exposure to any one commercial issuer. We seek to limit concentrations of credit risk with respect to receivables with control procedures that monitor the credit worthiness of customers, together with the large number of customers in the Company's customer base and their dispersion across different industries and geographic areas. As receivables are generally unsecured, the Company maintains an allowance for doubtful accounts based upon the expected credit losses. Receivable balances determined to be uncollectible are charged against the allowance. To accelerate the conversion to cash, the Company may sell a portion of its trade receivables to third parties. The Company has no recourse to these receivables once they are sold but may have continuing involvement related to servicing and collection activities. The impact of these transactions in the Company's Consolidated Statements of Operations for the three and nine months ended September 30, 2024 was not significant. The carrying values of cash, receivables, and accounts payable are considered to be representative of their respective fair values.
Derivative Instruments	Derivative Instruments
Recent Accounting Pronouncements	Recent Accounting Pronouncements Recently adopted accounting pronouncements Effective January 1, 2024, the Company adopted Accounting Standards Update No. 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures” (“ASU 2023-07”), which is intended to improve reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. The Company will adopt additional disclosure requirements within its annual reporting for the year ending December 31, 2024 and its interim reporting for the quarter ending March 31, 2025. Recently issued accounting pronouncements not adopted as of September 30, 2024 In December 2023, the FASB issued Accounting Standards Update No. 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures” (“ASU 2023-09”), which is intended to improve the transparency of income tax disclosures by requiring 1) consistent categories and greater disaggregation of information in the rate reconciliation and 2) income taxes paid disaggregated by jurisdiction. The standard also includes certain other amendments to improve the effectiveness of income tax disclosures. ASU 2023-09 will become effective for public companies during annual reporting periods beginning after December 15, 2024, with early adoption permitted. Although ASU 2023-09 only modifies the Company's required income tax disclosures, the Company is currently evaluating the impact of adopting this guidance on its Consolidated Financial Statements.

Overview and Summary of Signi_3

Overview and Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Unsatisfied Performance Obligations	Unsatisfied Performance Obligations The following table includes estimated revenue expected to be recognized in future periods related to performance obligations that are unsatisfied or partially satisfied as of September 30, 2024 and the percentage of the outstanding performance obligations as of September 30, 2024 expected to be delivered during the remainder of 2024: Unsatisfied performance obligations as of September 30, 2024 Total Percent expected to be delivered in 2024 (in millions) Engineered Structures: Utility, wind, and related structures $ 1,264.6 20 % Transportation Products: Inland barges $ 244.7 32 % Of the remaining unsatisfied performance obligations for utility, wind, and related structures, 47%

Fair Value Accounting (Tables)

Fair Value Accounting (Tables)	9 Months Ended
Fair Value Accounting (Tables)	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Assets and liabilities measured at fair value on recurring basis	Assets and liabilities measured at fair value on a recurring basis are summarized below: Fair Value Measurement as of September 30, 2024 Level 1 Level 2 Level 3 Total (in millions) Assets: Contingent consideration (1) $ — $ — $ 14.1 $ 14.1 Total assets $ — $ — $ 14.1 $ 14.1 Liabilities: Contingent consideration (2) $ — $ — $ 1.4 $ 1.4 Total liabilities $ — $ — $ 1.4 $ 1.4 Fair Value Measurement as of December 31, 2023 Level 1 Level 2 Level 3 Total (in millions) Liabilities: Contingent consideration (2) $ — $ — $ 2.7 $ 2.7 Total liabilities $ — $ — $ 2.7 $ 2.7 (1) Included in other assets on the Consolidated Balance Sheets. (2) Included in accrued liabilities on the Consolidated Balance Sheets.

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
Segment Information (Tables)	Sep. 30, 2024
Segment Reporting [Abstract]
Financial information for segments	The financial information for these segments is shown in the tables below. We operate principally in North America. Three Months Ended September 30, Revenues Operating Profit (Loss) 2024 2023 2024 2023 (in millions) Aggregates and specialty materials $ 233.6 $ 227.8 Construction site support 32.3 34.3 Construction Products 265.9 262.1 $ 40.4 $ 30.3 Utility, wind, and related structures 279.4 222.5 Engineered Structures 279.4 222.5 32.6 18.7 Inland barges 81.5 67.3 Steel components 13.6 39.8 Transportation Products 95.1 107.1 (14.2) 14.1 Segment Totals 640.4 591.7 58.8 63.1 Corporate — — (25.0) (14.7) Consolidated Total $ 640.4 $ 591.7 $ 33.8 $ 48.4 Nine Months Ended September 30, Revenues Operating Profit (Loss) 2024 2023 2024 2023 (in millions) Aggregates and specialty materials $ 690.8 $ 665.9 Construction site support 102.4 97.1 Construction Products 793.2 763.0 $ 108.6 $ 114.2 Utility, wind, and related structures 785.8 637.2 Engineered Structures 785.8 637.2 94.0 70.3 Inland barges 236.9 207.9 Steel components 87.8 117.6 Transportation Products 324.7 325.5 13.0 35.8 Segment Totals 1,903.7 1,725.7 215.6 220.3 Corporate — — (61.2) (45.8) Consolidated Total $ 1,903.7 $ 1,725.7 $ 154.4 $ 174.5

Property, Plant, and Equipment

Property, Plant, and Equipment (Tables)	9 Months Ended
Property, Plant, and Equipment (Tables)	Sep. 30, 2024
Property, Plant and Equipment [Abstract]
Components of property, plant, and equipment	The following table summarizes the components of property, plant, and equipment as of September 30, 2024 and December 31, 2023. September 30, December 31, (in millions) Land $ 145.0 $ 140.2 Mineral reserves 561.6 546.9 Buildings and improvements 357.6 345.6 Machinery and other 1,106.9 1,121.0 Construction in progress 93.0 115.5 2,264.1 2,269.2 Less accumulated depreciation and depletion (882.6) (932.9) $ 1,381.5 $ 1,336.3

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
Goodwill and Intangible Assets (Tables)	Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill by segment	Goodwill by segment is as follows: September 30, December 31, (in millions) Construction Products $ 509.1 $ 516.1 Engineered Structures 480.3 437.6 Transportation Products 19.9 37.0 $ 1,009.3 $ 990.7
Intangibles, net	Intangibles, net consisted of the following: September 30, December 31, (in millions) Intangibles with indefinite lives - Trademarks $ 43.8 $ 34.9 Intangibles with definite lives: Customer relationships 171.3 142.7 Permits 169.4 166.9 Other 16.9 2.3 357.6 311.9 Less accumulated amortization (95.1) (76.1) 262.5 235.8 Intangible assets, net $ 306.3 $ 270.7

Debt (Tables)

Debt (Tables)	9 Months Ended
Debt (Tables)	Sep. 30, 2024
Debt Disclosure [Abstract]
Components of debt	The following table summarizes the components of debt as of September 30, 2024 and December 31, 2023: September 30, December 31, (in millions) Secured revolving credit facility $ 240.0 $ 160.0 2021 Senior Notes - 4.375% due April 2029 400.0 400.0 2024 Senior Notes - 6.875% due August 2032 600.0 — Finance leases (see Note 8 Leases) 8.7 13.1 1,248.7 573.1 Less: unamortized debt issuance costs (11.8) (4.4) Total debt $ 1,236.9 $ 568.7
Remaining principal payments under debt agreement	The remaining principal payments under existing debt agreements as of September 30, 2024 are as follows (1) : 2024 2025 2026 2027 2028 Thereafter (in millions) Revolving credit facility $ — $ — $ — $ — $ 240.0 $ — 2021 Senior Notes - 4.375% due April 2029 — — — — — 400.0 2024 Senior Notes - 6.875% due August 2032 — — — — — 600.0 (1) The $700 million Term Loan was funded on October 1, 2024 concurrent with the closing of Stavola, of which $100 million was used to pay down the revolving credit facility. See Note 2 Acquisitions and Divestitures.

Leases (Tables)

Leases (Tables)	9 Months Ended
Leases (Tables)	Sep. 30, 2024
Leases [Abstract]
Future minimum lease payments	Future minimum lease payments for operating and finance lease obligations as of September 30, 2024 consisted of the following: Operating Leases Finance Leases (in millions) 2024 (remaining) $ 2.6 $ 1.8 2025 9.7 5.3 2026 7.6 1.5 2027 4.4 0.2 2028 2.8 — Thereafter 9.1 — Total undiscounted future minimum lease obligations 36.2 8.8 Less imputed interest (2.5) (0.1) Present value of net minimum lease obligations $ 33.7 $ 8.7
Balance sheet classification	The following table summarizes our operating and finance leases and their classification within the Consolidated Balance Sheet. September 30, December 31, (in millions) Assets Operating - Other assets $ 31.7 $ 36.7 Finance - Property, plant, and equipment, net 13.2 16.5 Total lease assets 44.9 53.2 Liabilities Current Operating - Accrued liabilities 9.0 8.4 Finance - Current portion of long-term debt 5.9 6.8 Non-current Operating - Other liabilities 24.7 29.7 Finance - Debt 2.8 6.3 Total lease liabilities $ 42.4 $ 51.2

Other, Net (Tables)

Other, Net (Tables)	9 Months Ended
Other, Net (Tables)	Sep. 30, 2024
Other Income and Expenses [Abstract]
Other, net (income) expense	Other, net (income) expense consists of the following items: Three Months Ended Nine Months Ended 2024 2023 2024 2023 (in millions) Interest income $ (3.8) $ (1.7) $ (6.2) $ (4.3) Foreign currency exchange transactions 2.7 0.4 5.5 (1.3) Other — — — (0.2) Other, net (income) expense $ (1.1) $ (1.3) $ (0.7) $ (5.8)

Employee Retirement Plans (Tabl

Employee Retirement Plans (Tables)	9 Months Ended
Employee Retirement Plans (Tables)	Sep. 30, 2024
Retirement Benefits [Abstract]
Retirement plan expense	Total employee retirement plan expense, which includes related administrative expenses, is as follows: Three Months Ended Nine Months Ended 2024 2023 2024 2023 (in millions) Defined contribution plans $ 4.3 $ 3.9 $ 12.9 $ 11.6 Multiemployer plan 0.4 0.4 1.2 1.2 $ 4.7 $ 4.3 $ 14.1 $ 12.8

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
Accumulated Other Comprehensive Loss (Tables)	Sep. 30, 2024
Equity [Abstract]
Changes in accumulated other comprehensive loss	Changes in accumulated other comprehensive loss for the nine months ended September 30, 2024 and 2023 are as follows: Currency Unrealized Accumulated (in millions) Balances at December 31, 2022 $ (17.0) $ 1.3 $ (15.7) Other comprehensive income (loss), net of tax, before reclassifications 0.1 0.2 0.3 Amounts reclassified from accumulated other comprehensive loss, net of tax expense (benefit) of $0.0, $0.4, and $0.4 — (1.4) (1.4) Other comprehensive income (loss) 0.1 (1.2) (1.1) Balances at September 30, 2023 $ (16.9) $ 0.1 $ (16.8) Balances at December 31, 2023 $ (16.2) $ — $ (16.2) Other comprehensive income (loss), net of tax, before reclassifications (0.5) — (0.5) Amounts reclassified from accumulated other comprehensive loss, net of tax expense (benefit) of $0.0, $0.0, and $0.0 — — — Other comprehensive income (loss) (0.5) — (0.5) Balances at September 30, 2024 $ (16.7) $ — $ (16.7)

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
Earnings Per Common Share (Tables)	Sep. 30, 2024
Earnings Per Share [Abstract]
Computation of basic and diluted earnings per share	The computation of basic and diluted earnings per share follows. Three Months Ended Three Months Ended Income Average EPS Income Average EPS (in millions, except per share amounts) Net income $ 16.6 $ 35.5 Unvested restricted share participation — (0.1) Net income per common share – basic 16.6 48.7 $ 0.34 35.4 48.7 $ 0.73 Effect of dilutive securities: Nonparticipating unvested restricted shares — 0.1 — 0.1 Net income per common share – diluted $ 16.6 48.8 $ 0.34 $ 35.4 48.8 $ 0.72 Nine Months Ended Nine Months Ended Income Average EPS Income Average EPS (in millions, except per share amounts) Net income $ 101.4 $ 132.1 Unvested restricted share participation (0.3) (0.5) Net income per common share – basic 101.1 48.6 $ 2.08 131.6 48.5 $ 2.71 Effect of dilutive securities: Nonparticipating unvested restricted shares — 0.1 — 0.2 Net income per common share – diluted $ 101.1 48.7 $ 2.07 $ 131.6 48.7 $ 2.70

Overview and Summary of Signi_4

Overview and Summary of Significant Accounting Policies - Stockholders' Equity (Details)	Sep. 30, 2024 USD ($)
Accounting Policies [Abstract]
Authorized stock repurchase amount	$ 50,000,000
Remaining authorized repurchase amount	$ 36,200,000

Overview and Summary of Signi_5

Overview and Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Accounting Policies [Abstract]
Contract asset with customer	$ 77.3	$ 66.8

Overview and Summary of Signi_6

Overview and Summary of Significant Accounting Policies - Unsatisfied Performance Obligation (Details) $ in Millions	Sep. 30, 2024 USD ($)
Engineered Structures \| Utility, wind, and related structures
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations, Amount	$ 1,264.6
Revenue, remaining performance obligation expected to be delivered in current year	20%
Revenue Remaining Performance Obligation Percentage Year 2	47%
Transportation Products \| Inland barges
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations, Amount	$ 244.7
Revenue, remaining performance obligation expected to be delivered in current year	32%

Acquisitions and Divestitures -

Acquisitions and Divestitures - Narrative (Details) $ in Millions		1 Months Ended	3 Months Ended						9 Months Ended			12 Months Ended
	Oct. 01, 2024 USD ($)	Jul. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)		Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($) businesses_divested	Jun. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)		Sep. 30, 2023 USD ($) businesses_divested	Dec. 31, 2023 USD ($)	Aug. 26, 2024 USD ($)	Aug. 01, 2024 USD ($)	Apr. 06, 2021 USD ($)	Jan. 02, 2020 USD ($)
Segment Reporting Information [Line Items]
Revenues			$ 640.4				$ 591.7		$ 1,903.7		$ 1,725.7
Operating profit (loss)			33.8				48.4		154.4		174.5
(Gain) loss on sale of businesses			(23)				$ 0		(3.5)		6.4
Proceeds from sale of businesses									86.4		$ 2
Number of Divestitures \| businesses_divested							0				0
Holdback payment from acquisition								$ (10)	0		$ (10)
Difference between holdback settlement and amount accrued at acquisition								5
Contingent Consideration, Asset			14.1						14.1
Goodwill			1,009.3	[1]		$ 990.7			1,009.3	[1]		$ 990.7
Bridge Loan \| Secured Debt
Segment Reporting Information [Line Items]
Committed secured bridge loan financing														$ 1,200
Steel components
Segment Reporting Information [Line Items]
(Gain) loss on sale of businesses									23
Asphalt and other non-operating facility
Segment Reporting Information [Line Items]
(Gain) loss on sale of businesses					$ 12.5
Proceeds from sale of businesses			27.3
Revolving credit facility \| Revolving Credit Facility
Segment Reporting Information [Line Items]
Line of credit facility, maximum borrowing capacity			600						600							$ 500
Borrowings under revolving credit facility					160							60
Revolving credit facility \| Revolving Credit Facility \| Subsequent Event
Segment Reporting Information [Line Items]
Line of credit facility, maximum borrowing capacity	$ 700
Senior notes \| Unsecured Debt
Segment Reporting Information [Line Items]
Long-Term Debt, Gross													$ 600		$ 400
Term loan \| Subsequent Event
Segment Reporting Information [Line Items]
Long-Term Debt, Gross	700
Construction Products
Segment Reporting Information [Line Items]
Goodwill			509.1			516.1			509.1			516.1
Engineered Structures
Segment Reporting Information [Line Items]
Goodwill			480.3			437.6			480.3			437.6
Transportation Products
Segment Reporting Information [Line Items]
Goodwill			19.9			37			19.9			$ 37
Transportation Products \| Steel components
Segment Reporting Information [Line Items]
Revenues									87.8		117.6
Operating profit (loss)									(20.9)		$ 8.1
Proceeds from sale of businesses									55
Transportation Products \| Steel components \| Combined Proceeds
Segment Reporting Information [Line Items]
Proceeds from sale of businesses									110
Transportation Products \| Steel components \| Seller's Note
Segment Reporting Information [Line Items]
Proceeds from sale of businesses									25
Transportation Products \| Steel components \| Earnout Receivable
Segment Reporting Information [Line Items]
Proceeds from sale of businesses									30
Ameron \| Engineered Structures
Segment Reporting Information [Line Items]
Acquisition price					$ 180
Property, plant, and equipment acquired			56.5						56.5
Inventory			18.1						18.1
Accounts receivable			12						12
Goodwill			42.8						42.8
Ameron \| Engineered Structures \| Trademarks
Segment Reporting Information [Line Items]
Indefinite-lived intangibles			8.9						8.9
Ameron \| Engineered Structures \| Customer relationships
Segment Reporting Information [Line Items]
Finite-lived intangibles			27.1						27.1
Ameron \| Engineered Structures \| Technology
Segment Reporting Information [Line Items]
Finite-lived intangibles			12.8						12.8
Lake Point \| Construction Products
Segment Reporting Information [Line Items]
Acquisition price						$ 65.1
Property, plant, and equipment acquired			13.2						13.2
Mineral reserves			19.1						19.1
Goodwill			15.4						15.4
Lake Point \| Construction Products \| Permits
Segment Reporting Information [Line Items]
Finite-lived intangibles			$ 11.5						$ 11.5
Stavola \| Construction Products \| Subsequent Event
Segment Reporting Information [Line Items]
Agreed purchase price, cash	$ 1,200
Southwest Rock \| Construction Products
Segment Reporting Information [Line Items]
Acquisition holdback payable								$ 15
Aggregates, Phoenix \| Construction Products
Segment Reporting Information [Line Items]
Acquisition price		$ 35

[1] (unaudited)

Fair Value Accounting - Assets

Fair Value Accounting - Assets and liabilities measured at fair value on recurring basis (Details) - USD ($) $ in Millions		Sep. 30, 2024		Dec. 31, 2023
Assets:
Contingent Consideration, Asset		$ 14.1
Fair Value, Measurements, Recurring
Assets:
Contingent Consideration, Asset	[1]	14.1
Total assets		14.1
Liabilities:
Contingent consideration liability		1.4	[2]	$ 2.7
Total liabilities		1.4		2.7
Level 1 \| Fair Value, Measurements, Recurring
Assets:
Contingent Consideration, Asset	[1]	0
Total assets		0
Liabilities:
Contingent consideration liability		0	[2]	0
Total liabilities		0		0
Level 2 \| Fair Value, Measurements, Recurring
Assets:
Contingent Consideration, Asset	[1]	0
Total assets		0
Liabilities:
Contingent consideration liability		0	[2]	0
Total liabilities		0		0
Level 3 \| Fair Value, Measurements, Recurring
Assets:
Contingent Consideration, Asset	[1]	14.1
Total assets		14.1
Liabilities:
Contingent consideration liability		1.4	[2]	2.7
Total liabilities		$ 1.4		$ 2.7

[1] Included in other assets on the Consolidated Balance Sheets. Included in accrued liabilities on the Consolidated Balance Sheets.

Segment Information - Financial

Segment Information - Financial information for segments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Revenues	$ 640.4	$ 591.7	$ 1,903.7	$ 1,725.7
Operating profit (loss)	33.8	48.4	154.4	174.5
Total
Segment Reporting Information [Line Items]
Revenues	640.4	591.7	1,903.7	1,725.7
Operating profit (loss)	58.8	63.1	215.6	220.3
Corporate
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Operating profit (loss)	(25)	(14.7)	(61.2)	(45.8)
Construction Products \| Total
Segment Reporting Information [Line Items]
Revenues	265.9	262.1	793.2	763
Operating profit (loss)	40.4	30.3	108.6	114.2
Engineered Structures \| Total
Segment Reporting Information [Line Items]
Revenues	279.4	222.5	785.8	637.2
Operating profit (loss)	32.6	18.7	94	70.3
Transportation Products \| Total
Segment Reporting Information [Line Items]
Revenues	95.1	107.1	324.7	325.5
Operating profit (loss)	(14.2)	14.1	13	35.8
Aggregates and specialty materials \| Construction Products
Segment Reporting Information [Line Items]
Revenues	233.6	227.8	690.8	665.9
Construction site support \| Construction Products
Segment Reporting Information [Line Items]
Revenues	32.3	34.3	102.4	97.1
Utility, wind, and related structures \| Engineered Structures
Segment Reporting Information [Line Items]
Revenues	279.4	222.5	785.8	637.2
Inland barges \| Transportation Products
Segment Reporting Information [Line Items]
Revenues	81.5	67.3	236.9	207.9
Steel components \| Transportation Products
Segment Reporting Information [Line Items]
Revenues	$ 13.6	$ 39.8	$ 87.8	$ 117.6

Segment Information - Narrative

Segment Information - Narrative (Details)	9 Months Ended
Segment Information - Narrative (Details)	Sep. 30, 2024 segment
Segment Reporting [Abstract]
Number of Reportable Segments	3

Property, Plant, and Equipmen_2

Property, Plant, and Equipment - Components of property, plant, and equipment (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2024		Sep. 30, 2023	Sep. 30, 2024		Sep. 30, 2023	Dec. 31, 2023
Components of property, plant, and equipment
Property, plant and equipment, at cost	$ 2,264.1			$ 2,264.1			$ 2,269.2
Less accumulated depreciation	(882.6)			(882.6)			(932.9)
Property, plant, and equipment, net	1,381.5	[1]		1,381.5	[1]		1,336.3
Impairment charge	0		$ 0	5.8		$ 0
Land
Components of property, plant, and equipment
Property, plant and equipment, at cost	145			145			140.2
Mineral reserves
Components of property, plant, and equipment
Property, plant and equipment, at cost	561.6			561.6			546.9
Buildings and improvements
Components of property, plant, and equipment
Property, plant and equipment, at cost	357.6			357.6			345.6
Machinery and other
Components of property, plant, and equipment
Property, plant and equipment, at cost	1,106.9			1,106.9			1,121
Construction in progress
Components of property, plant, and equipment
Property, plant and equipment, at cost	$ 93			$ 93			$ 115.5

[1] (unaudited)

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	Sep. 30, 2024		Dec. 31, 2023
Goodwill [Line Items]
Goodwill	$ 1,009.3	[1]	$ 990.7
Construction Products
Goodwill [Line Items]
Goodwill	509.1		516.1
Engineered Structures
Goodwill [Line Items]
Goodwill	480.3		437.6
Transportation Products
Goodwill [Line Items]
Goodwill	$ 19.9		$ 37

[1] (unaudited)

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2024		Dec. 31, 2023
Intangible Assets [Line Items]
Intangibles with indefinite lives - Trademarks	$ 43.8		$ 34.9
Intangibles with definite lives	357.6		311.9
Less accumulated amortization	(95.1)		(76.1)
Intangibles with definite lives, net	262.5		235.8
Intangibles, net	306.3	[1]	270.7
Customer relationships
Intangible Assets [Line Items]
Intangibles with definite lives	171.3		142.7
Permits
Intangible Assets [Line Items]
Intangibles with definite lives	169.4		166.9
Other
Intangible Assets [Line Items]
Intangibles with definite lives	$ 16.9		$ 2.3

[1] (unaudited)

Debt - Components of debt (Deta

Debt - Components of debt (Details) - USD ($) $ in Millions	3 Months Ended
Debt - Components of debt (Details) - USD ($) $ in Millions	Sep. 30, 2024	Aug. 26, 2024	Dec. 31, 2023	Apr. 06, 2021
Debt Instrument [Line Items]
Finance leases	$ 8.7		$ 13.1
Total debt, gross	1,248.7		573.1
Less: unamortized debt issuance costs	(11.8)		(4.4)
Total debt	1,236.9		568.7
Senior notes \| Unsecured Debt
Debt Instrument [Line Items]
Long-Term Debt, Gross		$ 600		$ 400
Interest rate		6.875%		4.375%
Senior Notes due 2029 \| Unsecured Debt
Debt Instrument [Line Items]
Long-Term Debt, Gross	400		400
Senior Notes due 2032 \| Unsecured Debt
Debt Instrument [Line Items]
Long-Term Debt, Gross	600		0
Revolving Credit Facility \| Revolving credit facility
Debt Instrument [Line Items]
Repayments of Lines of Credit	60
Revolving credit facility	240		$ 160
Less: unamortized debt issuance costs	$ (2.2)

Debt - Remaining principal paym

Debt - Remaining principal payments under debt agreement (Details) $ in Millions	Sep. 30, 2024 USD ($)
Senior notes \| Unsecured Debt
Debt Instrument [Line Items]
2024	$ 0
2025	0
2026	0
2027	0
2028	0
Senior Notes due 2029 \| Unsecured Debt
Debt Instrument [Line Items]
Thereafter	400
Senior Notes due 2032 \| Unsecured Debt
Debt Instrument [Line Items]
Thereafter	600
Revolving Credit Facility \| Revolving credit facility
Debt Instrument [Line Items]
2024	0
2025	0
2026	0
2027	0
2028	240
Thereafter	$ 0

Debt - Narrative (Details)

Debt - Narrative (Details) $ in Millions				3 Months Ended		9 Months Ended		12 Months Ended
Debt - Narrative (Details) $ in Millions	Oct. 01, 2024 USD ($)	Aug. 26, 2024 USD ($)	Apr. 06, 2021 USD ($)	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Aug. 01, 2024 USD ($)	Jan. 02, 2020 USD ($)
Debt Instrument [Line Items]
Unamortized debt issuance costs				$ 11.8		$ 11.8		$ 4.4
Debt issuance costs						8.2	$ 2
Bridge Loan
Debt Instrument [Line Items]
Debt issuance costs				1.5
Subsequent Event
Debt Instrument [Line Items]
Debt Instrument, Covenant, Unrestricted Cash, Maximum	$ 150
Secured Debt \| Bridge Loan
Debt Instrument [Line Items]
Committed secured bridge loan financing									$ 1,200
Senior notes
Debt Instrument [Line Items]
Debt issuance costs		$ 8.1	$ 6.6
Senior notes \| Unsecured Debt
Debt Instrument [Line Items]
Long-Term Debt, Gross		$ 600	$ 400
Interest rate		6.875%	4.375%
Senior Notes due 2032
Debt Instrument [Line Items]
Estimated fair value				628.6		628.6
Senior Notes due 2032 \| Unsecured Debt
Debt Instrument [Line Items]
Long-Term Debt, Gross				600		600		0
Senior Notes due 2029
Debt Instrument [Line Items]
Estimated fair value				383.9		383.9
Senior Notes due 2029 \| Unsecured Debt
Debt Instrument [Line Items]
Long-Term Debt, Gross				400		400		400
Term loan \| Subsequent Event
Debt Instrument [Line Items]
Long-Term Debt, Gross	$ 700
Debt Instrument, Quarterly Amortization Payment Rate	0.25%
Term loan \| Subsequent Event \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
SOFR variable rate spread	2.25%
Revolving Credit Facility \| Revolving credit facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				600		600				$ 500
Revolving credit facility				240		240		160
Line of credit facility, remaining borrowing capacity				359.3		$ 359.3
SOFR variable rate spread						1.50%
Line of credit facility, unused commitment fee percent						0.25%
Unamortized debt issuance costs				2.2		$ 2.2
Borrowings under revolving credit facility					$ 160			$ 60
Debt issuance costs				0.2
Repayments of Lines of Credit				60
Revolving Credit Facility \| Revolving credit facility \| Subsequent Event
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 700
Repayments of Lines of Credit	$ 100
Revolving Credit Facility \| Revolving credit facility \| Subsequent Event \| Fourth Quarter 2024
Debt Instrument [Line Items]
Debt Instrument, Covenant, Net Leverage Ratio	5
Revolving Credit Facility \| Revolving credit facility \| Subsequent Event \| July 1, 2025 to December 31, 2025
Debt Instrument [Line Items]
Debt Instrument, Covenant, Net Leverage Ratio	4.50
Revolving Credit Facility \| Revolving credit facility \| Subsequent Event \| January 1, 2026 to August 23, 2028
Debt Instrument [Line Items]
Debt Instrument, Covenant, Net Leverage Ratio	4
Revolving Credit Facility \| Revolving credit facility \| Subsequent Event \| Up to four fiscal quarters upon material acquisition
Debt Instrument [Line Items]
Debt Instrument, Covenant, Net Leverage Ratio	4.50
Revolving Credit Facility \| Revolving credit facility \| Minimum \| Subsequent Event
Debt Instrument [Line Items]
Line of credit facility, unused commitment fee percent	0.20%
Revolving Credit Facility \| Revolving credit facility \| Minimum \| Subsequent Event \| Base Rate
Debt Instrument [Line Items]
SOFR variable rate spread	0.25%
Revolving Credit Facility \| Revolving credit facility \| Minimum \| Subsequent Event \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
SOFR variable rate spread	1.25%
Revolving Credit Facility \| Revolving credit facility \| Maximum \| Subsequent Event
Debt Instrument [Line Items]
Line of credit facility, unused commitment fee percent	0.45%
Revolving Credit Facility \| Revolving credit facility \| Maximum \| Subsequent Event \| Base Rate
Debt Instrument [Line Items]
SOFR variable rate spread	1.50%
Revolving Credit Facility \| Revolving credit facility \| Maximum \| Subsequent Event \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
SOFR variable rate spread	2.50%
Letter of Credit \| Revolving credit facility
Debt Instrument [Line Items]
Letters of credit outstanding, amount				0.7		0.7
Designated as Hedging Instrument \| Interest Rate Swap
Debt Instrument [Line Items]
Derivative, notional amount				$ 100		$ 100
Derivative, fixed interest rate				2.71%		2.71%

Leases - Minimum lease payments

Leases - Minimum lease payments (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Leases [Abstract]
Operating lease payments, 2024 (remaining)	$ 2.6
Operating lease payments, 2025	9.7
Operating lease payments, 2026	7.6
Operating lease payments, 2027	4.4
Operating lease payments, 2028	2.8
Operating lease payments, thereafter	9.1
Operating lease payments	36.2
Operating lease payments, imputed interest	(2.5)
Operating lease payments, present value	33.7
Finance lease payments, 2024 (remaining)	1.8
Finance lease payments, 2025	5.3
Finance lease payments, 2026	1.5
Finance lease payments, 2027	0.2
Finance lease payments, 2028	0
Finance lease payments, thereafter	0
Finance lease payments	8.8
Finance lease liability, imputed interest	(0.1)
Finance leases	$ 8.7	$ 13.1

Leases - Balance Sheet Classifi

Leases - Balance Sheet Classification (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Leases [Abstract]
Right of use asset, Operating	$ 31.7	$ 36.7
Right of use asset, Operating	Other assets	Other assets
Right of use asset, Finance	$ 13.2	$ 16.5
Right of use asset, Finance	Property, plant, and equipment, net	Property, plant, and equipment, net
Right of use asset, Total	$ 44.9	$ 53.2
Lease liability, Current, Operating	$ 9	$ 8.4
Lease liability, Current, Operating	Accrued liabilities	Accrued liabilities
Lease liability, Current, Finance	$ 5.9	$ 6.8
Lease liability, Current, Finance	Current portion of long-term debt	Current portion of long-term debt
Lease liability, Non-current, Operating	$ 24.7	$ 29.7
Lease liability, Non-current, Operating	Other liabilities	Other liabilities
Lease liability, Non-current, Finance	$ 2.8	$ 6.3
Lease liability, Non-current, Finance	Debt	Debt
Lease liability, Total	$ 42.4	$ 51.2

Other, Net - Summary of other,

Other, Net - Summary of other, net (income) expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Other, net (income) expense
Interest income	$ (3.8)	$ (1.7)	$ (6.2)	$ (4.3)
Foreign currency exchange transactions	2.7	0.4	5.5	(1.3)
Other	0	0	0	(0.2)
Other, net (income) expense	$ (1.1)	$ (1.3)	$ (0.7)	$ (5.8)

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details)	3 Months Ended		9 Months Ended
Income Taxes - Narrative (Details)	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Effective tax rate	13.10%	17.40%	15.20%	17.10%
Statutory rate		21%		21%

Employee Retirement Plans - Ret

Employee Retirement Plans - Retirement plan expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Retirement Benefits [Abstract]
Defined contribution plans	$ 4.3	$ 3.9	$ 12.9	$ 11.6
Multiemployer plan	0.4	0.4	1.2	1.2
Retirement expense	$ 4.7	$ 4.3	$ 14.1	$ 12.8

Employee Retirement Plans - Nar

Employee Retirement Plans - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Retirement Benefits [Abstract]
Contributions to the multiemployer plan	$ 0.5	$ 0.4	$ 1.3	$ 1.1
Expected full year contributions by the employer to the multiemployer plan	$ 1.7		$ 1.7

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss - Changes in accumulated other comprehensive loss (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Equity beginning balance	$ (16.2)	$ (17)
Other comprehensive income (loss), net of tax, before reclassifications	(0.5)	0.1
Reclassification from accumulated other comprehensive income, current period, net of tax	0	0
Reclassification from AOCI, Current Period, Tax	0	0
Other comprehensive income (loss)	(0.5)	0.1
Equity ending balance	(16.7)	(16.9)
Unrealized gain (loss) on derivative financial instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Equity beginning balance	0	1.3
Other comprehensive income (loss), net of tax, before reclassifications	0	0.2
Reclassification from accumulated other comprehensive income, current period, net of tax	0	(1.4)
Reclassification from AOCI, Current Period, Tax	0	0.4
Other comprehensive income (loss)	0	(1.2)
Equity ending balance	0	0.1
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Equity beginning balance	(16.2)	(15.7)
Other comprehensive income (loss), net of tax, before reclassifications	(0.5)	0.3
Reclassification from accumulated other comprehensive income, current period, net of tax	0	(1.4)
Reclassification from AOCI, Current Period, Tax	0	0.4
Other comprehensive income (loss)	(0.5)	(1.1)
Equity ending balance	$ (16.7)	$ (16.8)

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Share-Based Payment Arrangement [Abstract]
Stock-based compensation	$ 4.9	$ 5.7	$ 19	$ 18.3

Earnings Per Common Share - Com

Earnings Per Common Share - Computation of basic and diluted earnings per share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share Reconciliation [Abstract]
Net income	$ 16.6	$ 35.5	$ 101.4	$ 132.1
Unvested restricted share participation	0	(0.1)	(0.3)	(0.5)
Net income per common share – basic	$ 16.6	$ 35.4	$ 101.1	$ 131.6
Net income - basic (shares)	48.7	48.7	48.6	48.5
Net income - basic (EPS)	$ 0.34	$ 0.73	$ 2.08	$ 2.71
Effect of dilutive securities:
Nonparticipating unvested restricted shares	$ 0	$ 0	$ 0	$ 0
Nonparticipating unvested restricted shares (shares)	0.1	0.1	0.1	0.2
Net income per common share – diluted	$ 16.6	$ 35.4	$ 101.1	$ 131.6
Net income - diluted (shares)	48.8	48.8	48.7	48.7
Net income - diluted (EPS)	$ 0.34	$ 0.72	$ 2.07	$ 2.70
Total weighted average restricted shares and antidilutive stock options	1.1	1.1	1.2	1.3