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REVENUE RECOGNITION (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Disaggregation of Revenue [Line Items] |  |
Sales Revenue, Goods, Net | $ 757,696 | $ 580,897
Welding Equipment [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Sales Revenue, Goods, Net | 315,805 |
Welding Consumables [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Sales Revenue, Goods, Net | 441,891 |
Americas Welding |  |
Disaggregation of Revenue [Line Items] |  |
Sales Revenue, Goods, Net | 434,772 | 383,324
International Welding |  |
Disaggregation of Revenue [Line Items] |  |
Sales Revenue, Goods, Net | 247,320 | 128,888
The Harris Products Group |  |
Disaggregation of Revenue [Line Items] |  |
Sales Revenue, Goods, Net | $ 75,604 | $ 68,685

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- Definition 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. + References No definition available. + Details
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- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(a)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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