SEGMENT INFORMATION, Depreciation Amortization (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment information [Abstract]
Depreciation/Amortization	$ 10,964	$ 10,973	$ 32,850	$ 32,810
Human Nutrition & Health [Member] | Reportable Segments [Member]
Segment information [Abstract]
Depreciation/Amortization	8,372	8,462	25,288	24,773
Animal Nutrition & Health [Member] | Reportable Segments [Member]
Segment information [Abstract]
Depreciation/Amortization	1,397	1,296	3,996	4,330
Specialty Products [Member] | Reportable Segments [Member]
Segment information [Abstract]
Depreciation/Amortization	1,019	1,028	3,039	3,067
Industrial Products [Member] | Reportable Segments [Member]
Segment information [Abstract]
Depreciation/Amortization	$ 176	$ 187	$ 527	$ 640