SEGMENT INFORMATION - Business Segment Earnings Before Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment information [Abstract]
Earnings before income taxes	$ 24,881	$ 25,061	$ 49,674	$ 50,238
Amortization expense	(6,128)	(6,279)	(11,970)	(12,472)
Interest and other (expense)	(1,521)	(2,042)	(3,208)	(4,105)
Corporate and Reconciling Items
Segment information [Abstract]
Transaction and integration costs, ERP implementation costs, and unallocated legal fees	(761)	(893)	(1,565)	(1,582)
Unallocated
Segment information [Abstract]
Amortization expense	(10)	0	(19)	0
Human Nutrition & Health \| Operating Segments
Segment information [Abstract]
Earnings before income taxes	12,338	9,685	26,041	22,617
Animal Nutrition & Health \| Operating Segments
Segment information [Abstract]
Earnings before income taxes	5,045	7,023	10,301	14,507
Specialty Products \| Operating Segments
Segment information [Abstract]
Earnings before income taxes	8,879	8,675	15,576	13,709
Industrial Products \| Operating Segments
Segment information [Abstract]
Earnings before income taxes	$ 911	$ 2,613	$ 2,548	$ 5,092

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

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
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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

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).

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
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-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

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