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Segment and Geographic Information, Revenue from External Customers by Products and Services (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Product Revenue from External Customer [Line Items] |  |  |
Revenue | $ 1,362,265 | $ 1,383,210 | $ 1,375,964
Traditional Flavors & Fragrances [Member] |  |  |
Product Revenue from External Customer [Line Items] |  |  |
Revenue | 618,798 | 651,870 | 666,528
Natural Ingredients [Member] |  |  |
Product Revenue from External Customer [Line Items] |  |  |
Revenue | 224,983 | 240,710 | 240,793
Food & Beverage Colors [Member] |  |  |
Product Revenue from External Customer [Line Items] |  |  |
Revenue | 303,796 | 301,751 | 300,637
Non-Food Colors [Member] |  |  |
Product Revenue from External Customer [Line Items] |  |  |
Revenue | 248,922 | 226,807 | 204,571
Interdivision Revenue [Member] |  |  |
Product Revenue from External Customer [Line Items] |  |  |
Revenue | $ (34,234) | $ (37,928) | $ (36,565)

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- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and 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(a)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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