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RATIONALIZATION AND ASSET IMPAIRMENTS (Summary of Activity Related to Rationalization Liabilities by Segment) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)
Activity related to the rationalization liabilities by segment
Balance at the beginning of the period	$ 13,622
Payments and other adjustments	(4,570)
Charged to expense	4,103
Balance at the end of the period	13,155
Americas Welding [Member]
Activity related to the rationalization liabilities by segment
Balance at the beginning of the period	25
Payments and other adjustments	(25)
Charged to expense	0
Balance at the end of the period	0
International Welding [Member]
Activity related to the rationalization liabilities by segment
Balance at the beginning of the period	13,597
Payments and other adjustments	(4,545)
Charged to expense	4,103
Balance at the end of the period	$ 13,155

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