SEGMENT INFORMATION, Business Segment Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Segment information [Abstract]
Assets	$ 986,076	$ 963,636
Human Nutrition & Health [Member] \| Reportable Segments [Member]
Segment information [Abstract]
Assets	713,858	719,010
Animal Nutrition & Health [Member] \| Reportable Segments [Member]
Segment information [Abstract]
Assets	127,809	118,418
Specialty Products [Member] \| Reportable Segments [Member]
Segment information [Abstract]
Assets	58,884	63,141
Industrial Products [Member] \| Reportable Segments [Member]
Segment information [Abstract]
Assets	26,905	18,471
Other Unallocated [Member]
Segment information [Abstract]
Assets	$ 58,620	$ 44,596

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Name:	us-gaap_Assets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant