SEGMENT INFORMATION - Business Segment Assets and Net Sales (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Assets	$ 1,199,325	$ 1,165,843
Net sales	799,023	703,644	$ 643,705
Operating Segments | Human Nutrition & Health
Segment Reporting Information [Line Items]
Assets	727,131	717,232
Net sales	442,733	400,330	347,433
Operating Segments | Animal Nutrition & Health
Segment Reporting Information [Line Items]
Assets	158,971	157,454
Net sales	226,776	192,191	177,557
Operating Segments | Specialty Products
Segment Reporting Information [Line Items]
Assets	184,628	190,449
Net sales	117,020	103,566	92,257
Other and Unallocated
Segment Reporting Information [Line Items]
Assets	128,595	100,708
Net sales	$ 12,494	$ 7,557	$ 26,458