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Segment Reporting - Operating Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Segment Reporting Information [Line Items] |  |  |  |
Net Sales | $ 454,603 | $ 452,414 | $ 900,500 | $ 912,865
Surfactants [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales | 298,587 | 299,743 | 608,547 | 630,294
Polymers [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales | 134,498 | 133,613 | 248,396 | 242,977
Specialty Products [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales | $ 21,518 | $ 19,058 | $ 43,557 | $ 39,594

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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