SEGMENT INFORMATION - Depreciation and Amortization (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment information [Abstract]
Depreciation and amortization	$ 13,055	$ 11,753	$ 38,349	$ 33,485
Other and Unallocated
Segment information [Abstract]
Depreciation and amortization	564	324	1,687	775
Human Nutrition & Health | Operating Segments
Segment information [Abstract]
Depreciation and amortization	8,188	7,411	24,047	22,880
Animal Nutrition & Health | Operating Segments
Segment information [Abstract]
Depreciation and amortization	1,842	1,646	5,390	4,847
Specialty Products | Operating Segments
Segment information [Abstract]
Depreciation and amortization	$ 2,461	$ 2,372	$ 7,225	$ 4,983