SEGMENT INFORMATION, Business Segment Earnings Before Income Tax (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment information [Abstract]
Earnings before income taxes	$ 25,061	$ 22,560	$ 50,238	$ 43,269
Transaction and integration costs	(893)	(1,899)	(1,582)	(1,953)
Indemnification settlement	0	2,087	0	2,087
Interest and other income (expense)	(2,558)	(2,271)	(4,793)	(4,265)
Human Nutrition & Health [Member] \| Reportable Segments [Member]
Segment information [Abstract]
Earnings before income taxes	10,066	11,320	23,069	21,516
Animal Nutrition & Health [Member] \| Reportable Segments [Member]
Segment information [Abstract]
Earnings before income taxes	7,113	3,689	14,597	9,065
Specialty Products [Member] \| Reportable Segments [Member]
Segment information [Abstract]
Earnings before income taxes	8,679	8,055	13,814	14,518
Industrial Products [Member] \| Reportable Segments [Member]
Segment information [Abstract]
Earnings before income taxes	$ 2,654	$ 1,579	$ 5,133	$ 2,301

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs could include legal, accounting and other professional fees. This element also includes costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs and systems integration and conversion costs.

No definition available.

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- Definition

Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(1)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

+ References

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- Definition

The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

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- References

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