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Acquisitions - Summary of Purchase Price Allocation for Acquisition (Detail) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020 | Sep. 17, 2020
--- | --- | --- | ---
Assets: |  |  |
Goodwill | $ 98,212 | $ 27,972 |
2020 Acquisitions [Member] | Clariant (Mexico) [Member] | Surfactants [Member] |  |  |
Assets: |  |  |
Goodwill |  |  | $ 5,165
Property, plant and equipment |  |  | 175
Total assets acquired |  |  | 14,940
Liabilities: |  |  |
Other non-current liabilities |  |  | 940
Total liabilities assumed |  |  | 940
Net assets acquired |  |  | 14,000
2020 Acquisitions [Member] | Clariant (Mexico) [Member] | Surfactants [Member] | Customer Lists [Member} |  |  |
Assets: |  |  |
Identifiable intangible assets |  |  | 8,000
2020 Acquisitions [Member] | Clariant (Mexico) [Member] | Surfactants [Member] | Trademarks and Know-how [Member] |  |  |
Assets: |  |  |
Identifiable intangible assets |  |  | 1,300
2020 Acquisitions [Member] | Clariant (Mexico) [Member] | Surfactants [Member] | Non-Compete Agreement [Member] |  |  |
Assets: |  |  |
Identifiable intangible assets |  |  | $ 300

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