SEGMENT INFORMATION - Business Segment Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Segment information [Abstract]
Assets	$ 1,096,628	$ 981,355
Unallocated
Segment information [Abstract]
Assets	69,798	59,473
Human Nutrition & Health | Operating Segments
Segment information [Abstract]
Assets	692,558	702,692
Animal Nutrition & Health | Operating Segments
Segment information [Abstract]
Assets	136,680	136,810
Specialty Products | Operating Segments
Segment information [Abstract]
Assets	182,002	59,558
Industrial Products | Operating Segments
Segment information [Abstract]
Assets	$ 15,590	$ 22,822