SEGMENT INFORMATION - Depreciation and Amortization (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment information [Abstract]
Depreciation and amortization	$ 12,745	$ 10,896	$ 25,294	$ 21,732
Other and Unallocated
Segment information [Abstract]
Depreciation and amortization	565	200	1,123	451
Human Nutrition & Health | Operating Segments
Segment information [Abstract]
Depreciation and amortization	8,015	7,483	15,859	15,469
Animal Nutrition & Health | Operating Segments
Segment information [Abstract]
Depreciation and amortization	1,793	1,623	3,548	3,201
Specialty Products | Operating Segments
Segment information [Abstract]
Depreciation and amortization	$ 2,372	$ 1,590	$ 4,764	$ 2,611