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BUSINESS DESCRIPTION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Goodwill and Acquired Intangible Assets (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2017
USD ($)
Goodwill [Roll Forward]  
Goodwill, beginning of period $ 439,811
Goodwill as a result of the Acquisitions - see Note 2 1,550
Goodwill, end of period 441,361
Human Nutrition & Health [Member]  
Goodwill [Roll Forward]  
Goodwill, beginning of period 404,187
Goodwill, end of period 405,334
Animal Nutrition & Health [Member]  
Goodwill [Roll Forward]  
Goodwill, beginning of period 11,734
Goodwill, end of period 12,137
Specialty Products [Member]  
Goodwill [Roll Forward]  
Goodwill, beginning of period 22,662
Goodwill, end of period 22,662
Industrial Products [Member]  
Goodwill [Roll Forward]  
Goodwill, beginning of period 1,228
Goodwill, end of period $ 1,228
Customer Relationships and Lists [Member]  
Acquired Finite-Lived Intangible Assets [Line Items]  
Amortization Period 10 years
Trademarks & Trade Names [Member] | Minimum [Member]  
Acquired Finite-Lived Intangible Assets [Line Items]  
Amortization Period 5 years
Trademarks & Trade Names [Member] | Maximum [Member]  
Acquired Finite-Lived Intangible Assets [Line Items]  
Amortization Period 17 years
Developed Technology [Member]  
Acquired Finite-Lived Intangible Assets [Line Items]  
Amortization Period 5 years
Regulatory Registration Costs [Member] | Minimum [Member]  
Acquired Finite-Lived Intangible Assets [Line Items]  
Amortization Period 5 years
Regulatory Registration Costs [Member] | Maximum [Member]  
Acquired Finite-Lived Intangible Assets [Line Items]  
Amortization Period 10 years
Patents & Trade Secrets [Member] | Minimum [Member]  
Acquired Finite-Lived Intangible Assets [Line Items]  
Amortization Period 15 years
Patents & Trade Secrets [Member] | Maximum [Member]  
Acquired Finite-Lived Intangible Assets [Line Items]  
Amortization Period 17 years
Other [Member] | Minimum [Member]  
Acquired Finite-Lived Intangible Assets [Line Items]  
Amortization Period 3 years
Other [Member] | Maximum [Member]  
Acquired Finite-Lived Intangible Assets [Line Items]  
Amortization Period 18 years