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Summary of Significant Accounting Policies (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Accounting Policies |  |  |
Checks outstanding | $ 7,300,000 |  |
LIFO inventory amount | 196,500,000 | $ 195,600,000 |
Inventory, LIFO reserve | 64,051,000 | 95,167,000 |
Inventories valued at FIFO | 15,900,000 | 16,200,000 |
Goodwill | 56,192,000 | 56,192,000 |
Research and development expense | 8,800,000 | 9,800,000 | $ 12,500,000
Interest and penalties | 0 | 0 | $ 0
Unrecognized tax benefits | $ 0 | 0 |
Minimum |  |  |
Accounting Policies |  |  |
Useful life | 5 years |  |
Maximum |  |  |
Accounting Policies |  |  |
Useful life | 20 years |  |
Buildings and improvements | Minimum |  |  |
Accounting Policies |  |  |
Property, plant, equipment useful life (in years) | 10 years |  |
Buildings and improvements | Maximum |  |  |
Accounting Policies |  |  |
Property, plant, equipment useful life (in years) | 40 years |  |
Machinery and equipment | Minimum |  |  |
Accounting Policies |  |  |
Property, plant, equipment useful life (in years) | 3 years |  |
Machinery and equipment | Maximum |  |  |
Accounting Policies |  |  |
Property, plant, equipment useful life (in years) | 35 years |  |
Assets used in short production cycles or subject to high corrosion | Minimum |  |  |
Accounting Policies |  |  |
Property, plant, equipment useful life (in years) | 3 years |  |
Assets used in short production cycles or subject to high corrosion | Maximum |  |  |
Accounting Policies |  |  |
Property, plant, equipment useful life (in years) | 30 years |  |
Standard plant assets | Minimum |  |  |
Accounting Policies |  |  |
Property, plant, equipment useful life (in years) | 3 years |  |
Standard plant assets | Maximum |  |  |
Accounting Policies |  |  |
Property, plant, equipment useful life (in years) | 30 years |  |
Major process equipment | Minimum |  |  |
Accounting Policies |  |  |
Property, plant, equipment useful life (in years) | 3 years |  |
Major process equipment | Maximum |  |  |
Accounting Policies |  |  |
Property, plant, equipment useful life (in years) | 35 years |  |
Forward Commodity Agreement |  |  |
Accounting Policies |  |  |
Notional amount | $ 0 | $ 0 |

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