SEGMENT INFORMATION (Details) $ in Thousands	3 Months Ended
Mar. 31, 2016 USD ($) Facility	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)
SEGMENT INFORMATION [Abstract]
Percentage decrease of chlorides released in environment	75.00%
Number of filing facilities \| Facility	2
Segment information [Abstract]
Assets	$ 970,226		$ 879,686
Depreciation/Amortization	10,880	$ 9,869
Capital expenditures	10,660	6,368
Net sales	135,141	144,862
Earnings before income taxes	17,981	23,085
Transaction costs, integration costs, and legal settlement	(461)	0
Interest and other expense	(1,987)	(1,953)
Human Nutrition & Health [Member] \| Reportable Segments [Member]
Segment information [Abstract]
Assets	734,390		642,929
Depreciation/Amortization	8,081	7,639
Capital expenditures	7,933	2,626
Net sales	71,555	67,757
Earnings before income taxes	8,372	7,706
Animal Nutrition & Health [Member] \| Reportable Segments [Member]
Segment information [Abstract]
Assets	113,933		107,459
Depreciation/Amortization	1,806	1,546
Capital expenditures	2,418	3,260
Net sales	39,232	42,706
Earnings before income taxes	6,535	8,510
Specialty Products [Member] \| Reportable Segments [Member]
Segment information [Abstract]
Assets	69,139		24,769
Depreciation/Amortization	822	341
Capital expenditures	129	211
Net sales	17,117	13,579
Earnings before income taxes	5,288	5,701
Industrial Products [Member] \| Reportable Segments [Member]
Segment information [Abstract]
Assets	9,531		16,191
Depreciation/Amortization	171	343
Capital expenditures	180	271
Net sales	7,237	20,820
Earnings before income taxes	234	$ 3,121
Other Unallocated [Member] \| Reportable Segments [Member]
Segment information [Abstract]
Assets	$ 43,233		$ 88,338

Represents number of filing facilities available for specialty products .

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Percentage of amount of chlorides released into the environment reduced when compared to potassium chloride.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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