SEGMENT INFORMATION - Capital Expenditures (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]
Capital expenditures			$ 12,375	$ 14,688
Unallocated amortization expense	$ 6,985	$ 6,128	13,964	11,970
Other and Unallocated
Segment information [Abstract]
Capital expenditures			87	381
Unallocated amortization expense	405	10	806	19
Corporate and Reconciling Items
Segment information [Abstract]
Transaction and integration related costs	$ 746	$ 761	2,018	1,565
Human Nutrition & Health | Operating Segments
Segment information [Abstract]
Capital expenditures			8,884	9,927
Animal Nutrition & Health | Operating Segments
Segment information [Abstract]
Capital expenditures			2,446	2,216
Specialty Products | Operating Segments
Segment information [Abstract]
Capital expenditures			$ 958	$ 2,164