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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Income Tax Disclosure [Abstract] |  |
Reserves | $ 1,060 | $ 685
Environmental | 3,970 | 4,481
Compensation | 1,920 | 2,415
Pension | 4,479 | 4,279
Post-retirement benefits | 1,210 | 1,388
Research & development expenses | 4,239 | 3,092
Tax carryforwards | 45,729 | 16,703
Other | 2,444 | 5,714
Deferred tax assets | 65,051 | 38,757
Valuation allowance | (24,526) | (23,305)
Net deferred tax assets | 40,525 | 15,452
Property | (93,164) | (70,492)
Intangible assets | (14,063) | (18,808)
Inventories | (37) | 0
Other | (5,201) | (3,282)
Deferred tax liabilities | (112,465) | (92,582)
Net deferred tax liabilities | $ (71,940) | $ (77,130)

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