SEGMENT INFORMATION - Capital Expenditures (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]
Capital expenditures			$ 19,279	$ 19,557
Unallocated amortization expense	$ 6,911	$ 6,753	20,875	18,723
Other and Unallocated
Segment information [Abstract]
Capital expenditures			298	583
Unallocated amortization expense	399	138	1,205	157
Corporate and Reconciling Items
Segment information [Abstract]
Transaction and integration related costs	$ 161	$ 688	2,179	2,253
Human Nutrition & Health | Operating Segments
Segment information [Abstract]
Capital expenditures			13,481	14,136
Animal Nutrition & Health | Operating Segments
Segment information [Abstract]
Capital expenditures			3,958	2,788
Specialty Products | Operating Segments
Segment information [Abstract]
Capital expenditures			$ 1,542	$ 2,050