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v3.25.4

Income Taxes - Schedule of Net Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Deferred tax assets: |  |
Deferred compensation/compensation related | $ 20,750 | $ 23,751
Asset retirement obligations | 20,506 | 15,420
Operating lease liabilities | 13,317 | 12,725
Accrued pension costs | 9,958 | 9,528
Capitalized inventory overheads | 9,951 | 8,359
Net operating loss | 3,318 | 5,528
Section 174 costs | 0 | 4,051
Other | 7,053 | 4,645
Total deferred tax assets | 84,853 | 84,007
Deferred tax liabilities: |  |
Basis differences on property, plant and equipment | 317,809 | 209,488
Intangible assets | 17,347 | 13,574
Operating lease right-of-use-assets | 13,317 | 12,725
Other | 21,269 | 17,419
Total deferred tax liabilities | 369,742 | 253,206
Valuation allowance | 3,028 | 5,528
Net deferred income tax liability | $ (287,917) | $ (174,727)

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