SEGMENT INFORMATION - Depreciation and Amortization (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment information [Abstract]
Depreciation and amortization	$ 12,364	$ 12,549
Other and Unallocated
Segment information [Abstract]
Depreciation and amortization	758	558
Human Nutrition & Health | Operating Segments
Segment information [Abstract]
Depreciation and amortization	7,573	7,844
Animal Nutrition & Health | Operating Segments
Segment information [Abstract]
Depreciation and amortization	1,764	1,755
Specialty Products | Operating Segments
Segment information [Abstract]
Depreciation and amortization	$ 2,269	$ 2,392