SEGMENT INFORMATION - Depreciation and Amortization (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment information [Abstract]
Depreciation/Amortization	$ 10,756	$ 11,018
Human Nutrition & Health | Operating Segments
Segment information [Abstract]
Depreciation/Amortization	7,986	8,532
Animal Nutrition & Health | Operating Segments
Segment information [Abstract]
Depreciation/Amortization	1,578	1,305
Specialty Products | Operating Segments
Segment information [Abstract]
Depreciation/Amortization	1,021	1,010
Industrial Products | Operating Segments
Segment information [Abstract]
Depreciation/Amortization	$ 171	$ 171