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Goodwill and Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Intangible assets [Abstract]      
Cost $ 24,643 $ 24,440  
Accumulated Amortization (17,432) (16,314)  
Intangible assets expense [Abstract]      
Amortization expense of intangible assets 1,600 1,300 $ 1,200
Estimated Amortization Expense [Abstract]      
2018 1,300    
2019 1,300    
2020 1,300    
2021 1,300    
2022 1,300    
Goodwill activity [Roll Forward]      
Balance as of beginning of period 383,568 399,646  
Currency translation impact 25,427 (15,257)  
Goodwill Held for Sale [1]   (821)  
Balance as of end of period $ 408,995 383,568 399,646
Weighted Average [Member]      
Intangible assets [Abstract]      
Weighted Average Amortization Years 19 years 8 months 12 days    
Flavor and Fragrances [Member]      
Goodwill activity [Roll Forward]      
Balance as of beginning of period $ 109,369 114,348  
Currency translation impact 5,624 (4,158)  
Goodwill Held for Sale [1]   (821)  
Balance as of end of period 114,993 109,369 114,348
Color [Member]      
Goodwill activity [Roll Forward]      
Balance as of beginning of period 272,006 282,348  
Currency translation impact 18,883 (10,342)  
Goodwill Held for Sale [1]   0  
Balance as of end of period 290,889 272,006 282,348
Asia Pacific [Member]      
Goodwill activity [Roll Forward]      
Balance as of beginning of period 2,193 2,950  
Currency translation impact 920 (757)  
Goodwill Held for Sale [1]   0  
Balance as of end of period 3,113 2,193 $ 2,950
Technological Know-how [Member]      
Intangible assets [Abstract]      
Cost 7,510 7,315  
Accumulated Amortization $ (6,505) (5,195)  
Technological Know-how [Member] | Weighted Average [Member]      
Intangible assets [Abstract]      
Weighted Average Amortization Years 20 years    
Customer Relationships [Member]      
Intangible assets [Abstract]      
Cost $ 6,869 6,561  
Accumulated Amortization $ (5,244) (4,610)  
Customer Relationships [Member] | Weighted Average [Member]      
Intangible assets [Abstract]      
Weighted Average Amortization Years 20 years    
Patents, Trademarks, Non-compete Agreements and Other [Member]      
Intangible assets [Abstract]      
Cost $ 10,264 10,564  
Accumulated Amortization $ (5,683) $ (6,509)  
Patents, Trademarks, Non-compete Agreements and Other [Member] | Weighted Average [Member]      
Intangible assets [Abstract]      
Weighted Average Amortization Years 19 years 2 months 12 days    
[1] A portion of the Flavors & Fragrances' segment goodwill was moved in 2016 to Assets Held for Sale on the Consolidated Balance Sheet as a result of the divestiture. See Note 14, Divestiture, for additional information.