For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The percentage of LIFO (last in first out) inventory to total inventory as of the balance sheet date if other than 100 percent.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Subparagraph (SX 210.5-02(13))
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

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SEGMENT INFORMATION (Geographic Split of Net Sales and Property, Plant and Equipment ) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Geographic split of the Company's net sales, based on the location of the customer, and property, plant and equipment
Net sales	$ 747,185	$ 669,491	$ 626,858	$ 580,897	$ 563,828	$ 567,646	$ 592,418	$ 550,772	$ 2,624,431	$ 2,274,614	$ 2,535,791
Total property, plant and equipment, net	$ 477,031				$ 372,377				$ 477,031	$ 372,377	411,323
Percentage of LIFO Inventory	32.00%				40.00%				32.00%	40.00%
United States
Geographic split of the Company's net sales, based on the location of the customer, and property, plant and equipment
Net sales									$ 1,388,816	$ 1,308,635	1,387,882
Total property, plant and equipment, net	$ 194,491				$ 176,041				194,491	176,041	173,974
Other foreign countries
Geographic split of the Company's net sales, based on the location of the customer, and property, plant and equipment
Net sales									1,235,615	965,979	1,147,909
Total property, plant and equipment, net	282,931				196,679				282,931	196,679	237,718
Corporate / Eliminations
Geographic split of the Company's net sales, based on the location of the customer, and property, plant and equipment
Total property, plant and equipment, net	$ (391)				$ (343)				$ (391)	$ (343)	$ (369)
Customer Concentration Risk [Member] \| Sales Revenue, Goods, Net [Member] \| Maximum
Geographic split of the Company's net sales, based on the location of the customer, and property, plant and equipment
Concentration Risk, Percentage									10.00%	10.00%	10.00%