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RATIONALIZATION AND ASSET IMPAIRMENTS (Tables)
 12 Months Ended
Dec. 31, 2017
Restructuring and Related Activities [Abstract]  
Summary of the activity related to the rationalization liabilities by segment
 
 
Americas Welding
 
International
Welding
 
Consolidated
Balance at December 31, 2015
 
$
67

 
$
7,598

 
$
7,665

Payments and other adjustments
 
(67
)
 
(2,408
)
 
(2,475
)
Balance at December 31, 2016
 
$
—

 
$
5,190

 
$
5,190

Payments and other adjustments
 
—

 
(3,536
)
 
(3,536
)
Charged to expense
 
—

 
5,149

 
5,149

Balance at December 31, 2017
 
$
—

 
$
6,803

 
$
6,803