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Sale of Assets - Additional Information (Detail) - Operating Segments [Member] - Surfactants [Member] - Stepan Philippines Quaternaries, Inc.[Member] | May 27, 2025 USD ($)
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Business Combination [Line Items] |
Assets held for sale | $ 8,476,000
Liabilities held for sale | 4,571,000
Liabilities held for sale operating lease liabilities | 4,571,000
Assets held for sale property, plant and equipment net | 3,796,000
Assets held for sale operating lease right-of use assets | $ 4,680,000

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