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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2024

Income Tax Disclosure [Abstract]

Schedule of Income (Loss) Before Income Tax Benefit

The components of Income (loss) before income tax benefit and the Income tax benefit for the years ended December 31 are as follows:

			2024						2023
Income (loss) before income tax benefit
Domestic			$	33,637					$	(64,077)
Foreign			9						(81)
			$	33,646					$	(64,158)
Income tax benefit
Current income tax provision (benefit):
Federal			$	(2,520)					$	(3,405)
State			906						290
Foreign			2						(342)
Total current			(1,612)						(3,457)
Deferred income tax provision (benefit):
Federal			1,373						(16,467)
State			144						(4,647)
Total deferred			1,517						(21,114)
			$	(95)					$	(24,571)

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation of the federal statutory and effective income tax rate for the years ended December 31 is as follows:

			2024						2023
Income (loss) before income tax benefit			$	33,646					$	(64,158)
Statutory taxes at 21.0%			$	7,066					$	(13,473)
State and local income taxes			556						(4,392)
Non-deductible expenses			927						1,071
Percentage depletion			(4,683)						(3,455)
R&D and other federal credits			(796)						(109)
Settlements and uncertain tax positions			(2,273)						(3,512)
Other, net			(892)						(701)
Income tax benefit			$	(95)					$	(24,571)
Effective income tax rate			(0.3)		%				38.3		%

Schedule of Deferred Tax Assets and Liabilities

A detailed summary of the total deferred tax assets and liabilities in our Consolidated Balance Sheets resulting from differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes is as follows:

			December 31
			2024						2023
Deferred tax assets
Lease liabilities			$	1,252					$	7,083
Tax carryforwards			12,371						14,816
Inventories			6,029						4,880
Accrued liabilities			9,430						9,226
Employee benefits			3,630						3,319
Land valuation adjustment			6,489						6,378
Partnership investment - development costs			14,819						12,565
Other			7,866						9,680
Total deferred tax assets			61,886						67,947
Less: Valuation allowance			11,672						11,783
			50,214						56,164
Deferred tax liabilities
Lease right-of-use assets			1,209						7,429
Depreciation and depletion			23,731						23,607
Accrued pension benefits			10,633						10,047
Total deferred tax liabilities			35,573						41,083
Net deferred asset			$	14,641					$	15,081

Schedule of Tax Credit Carryforwards

The following table summarizes the tax carryforwards and associated carryforward periods and related valuation allowances where we have determined that realization is uncertain:

			December 31, 2024
			Net deferred tax asset						Valuation allowance						Carryforwards expire during:
State net operating loss			$	15,584					$	14,610					2025 - 2044

			December 31, 2023
			Net deferred tax asset						Valuation allowance						Carryforwards expire during:
State net operating loss			$	16,526					$	14,757					2024-2043

Schedule of Unrecognized Tax Benefits Roll Forward

The following is a reconciliation of our total gross unrecognized tax benefits, defined as the aggregate tax effect of differences between tax return positions and the benefits recognized in the financial statements for the years ended December 31, 2024 and 2023. Approximately $0.6 million and $2.8 million of the gross unrecognized tax benefits as of December 31, 2024 and 2023, respectively, relate to permanent items that, if recognized, would impact the effective income tax rate. This amount differs from the gross unrecognized tax benefits presented in the table below due to (1) the deferred tax asset which would be available if the position were not sustained upon audit and (2) the decrease in U.S. federal income taxes which would occur upon the recognition of the state tax benefits included herein.

			2024						2023
Balance at January 1			$	6,148					$	9,626
Decreases based on lapse of applicable statute of limitations			(5,396)						(3,478)
Balance at December 31			$	752					$	6,148

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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.

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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.

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