SEGMENT INFORMATION - Depreciation and Amortization (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment information [Abstract]
Depreciation and amortization	$ 12,159	$ 13,055	$ 36,622	$ 38,349
Operating segments | Human Nutrition & Health
Segment information [Abstract]
Depreciation and amortization	7,472	8,188	22,486	24,047
Operating segments | Animal Nutrition & Health
Segment information [Abstract]
Depreciation and amortization	1,932	1,842	5,512	5,390
Operating segments | Specialty Products
Segment information [Abstract]
Depreciation and amortization	1,997	2,461	6,351	7,225
Other and unallocated
Segment information [Abstract]
Depreciation and amortization	$ 758	$ 564	$ 2,273	$ 1,687