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Revenue from Contracts with Customers - Summary of Geographic Disaggregation of Net Sales (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disaggregation Of Revenue [Line Items] |  |  |  |
Net sales | [1] | $ 1,869,750 | $ 1,858,745 | $ 1,993,857
Polymers [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Net sales |  | 452,277 | 512,347 | 527,420
Specialty Products [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Net sales |  | 65,787 | 73,675 | 80,505
Surfactants [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Net sales |  | 1,351,686 | 1,272,723 | 1,385,932
North America [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Net sales |  | 1,148,996 | 1,142,391 | 1,223,153
North America [Member] | Polymers [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Net sales |  | 265,700 | 314,549 | 323,360
North America [Member] | Specialty Products [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Net sales |  | 56,455 | 61,501 | 68,201
North America [Member] | Surfactants [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Net sales |  | 826,841 | 766,341 | 831,592
Europe [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Net sales |  | 391,252 | 411,340 | 461,678
Europe [Member] | Polymers [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Net sales |  | 147,289 | 158,455 | 172,632
Europe [Member] | Specialty Products [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Net sales |  | 9,332 | 12,174 | 12,304
Europe [Member] | Surfactants [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Net sales |  | 234,631 | 240,711 | 276,742
Latin America [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Net sales |  | 237,066 | 215,709 | 216,287
Latin America [Member] | Polymers [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Net sales |  | 2,498 | 3,304 | 3,463
Latin America [Member] | Surfactants [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Net sales |  | 234,568 | 212,405 | 212,824
Asia [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Net sales |  | 92,436 | 89,305 | 92,739
Asia [Member] | Polymers [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Net sales |  | 36,790 | 36,039 | 27,965
Asia [Member] | Surfactants [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Net sales |  | $ 55,646 | $ 53,266 | $ 64,774
[1] | Net sales are attributed to countries based on the location of the Company facility making the sales.

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
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