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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2024

Income Tax Disclosure [Abstract]

Components of the provision for income taxes

The components of the provision for income taxes are as follows:

			Year Ended December 31,
			2024						2023						2022
			(in millions)
Current:
Federal			$	3.7					$	3.0					$	11.3
State			4.6						1.9						7.9
Foreign			2.8						—						6.4
Total current			11.1						4.9						25.6
Deferred:
Federal			15.1						25.0						37.5
State			6.4						4.1						5.7
Foreign			3.7						2.7						1.6
Total deferred			25.2						31.8						44.8
Provision			$	36.3					$	36.7					$	70.4

Reconciliation between the statutory U.S. federal income tax rate and the Company's effective income tax rate

The following is a reconciliation between the statutory U.S. federal income tax rate and the Company’s effective income tax rate on income before income taxes:

			Year Ended December 31,
			2024						2023						2022
Statutory rate			21.0		%				21.0		%				21.0		%
State taxes, including prior year true-ups			7.5						2.3						3.8
AMP tax credits			(8.2)						(3.5)						—
Statutory depletion			(3.2)						(2.1)						(1.3)
Changes in valuation allowances and reserves			(1.1)						1.8						0.1
Prior year true-ups			0.4						(0.5)						—
Foreign adjustments			1.5						1.8						(0.2)
Currency adjustments			4.8						(2.6)						(0.8)
Compensation related items			0.5						—						0.2
Divestiture-related non-deductible goodwill			3.3						—						—
Other, net			1.4						0.5						(0.5)
Effective rate			27.9		%				18.7		%				22.3		%

Components of deferred tax liabilities and assets

The components of deferred tax liabilities and assets are as follows:

			December 31,
			2024						2023
			(in millions)
Deferred tax liabilities:
Depreciation, depletion, and amortization			$	248.7					$	230.8
Total deferred tax liabilities			248.7						230.8
Deferred tax assets:
Workers compensation and other benefits			12.3						13.9
Warranties and reserves			1.1						1.1
Equity items			—						(0.3)
Tax carryforwards and credits			36.9						52.8
Inventory			6.1						1.9
Accrued liabilities and other			1.5						(2.3)
Total deferred tax assets			57.9						67.1
Net deferred tax assets (liabilities) before valuation allowances			(190.8)						(163.7)
Valuation allowances			7.0						9.1
Adjusted net deferred tax assets (liabilities)			$	(197.8)					$	(172.8)

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- References

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- Definition

Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-9

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- Definition

Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

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- Definition

Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 231
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-231

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
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-Name Accounting Standards Codification
-Section 50
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12A

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12

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