SEGMENT INFORMATION (Financial Information of Reportable Segments) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Financial information for the reportable segments
Net sales (Note 2)	$ 981,197	$ 1,039,343
Adjusted EBIT	173,676	171,632
Special items charge	6,367	3,087
EBIT	167,309	168,545
Interest income	3,221	854
Interest expense	(12,000)	(14,055)
Income before income taxes	158,530	155,344
Rationalization and asset impairment charges (Note 6)	4,605	877
Inter-segment
Financial information for the reportable segments
Net sales (Note 2)	(41,479)	(41,968)
Corporate/Eliminations
Financial information for the reportable segments
Net sales (Note 2)	(41,479)	(41,968)
Adjusted EBIT	(10,078)	(9,402)
Special items charge	1,762	0
EBIT	(11,840)	(9,402)
Acquisition Costs	1,762
Americas Welding
Financial information for the reportable segments
Net sales (Note 2)	624,099	658,645
Business combination, inventory step up		2,785
Americas Welding \| Operating Segments
Financial information for the reportable segments
Net sales (Note 2)	654,077	690,963
Adjusted EBIT	136,100	132,453
Special items charge	0	2,785
EBIT	136,100	129,668
Americas Welding \| Inter-segment
Financial information for the reportable segments
Net sales (Note 2)	29,978	32,318
International Welding
Financial information for the reportable segments
Net sales (Note 2)	235,761	252,416
Rationalization and asset impairment charges (Note 6)	3,069	877
Business combination, inventory step up		1,071
Gain (loss) on disposition of assets		1,646
International Welding \| Operating Segments
Financial information for the reportable segments
Net sales (Note 2)	244,169	259,169
Adjusted EBIT	27,776	29,598
Special items charge	3,069	302
EBIT	24,707	29,296
International Welding \| Inter-segment
Financial information for the reportable segments
Net sales (Note 2)	8,408	6,753
The Harris Products Group
Financial information for the reportable segments
Net sales (Note 2)	121,337	128,282
Rationalization and asset impairment charges (Note 6)	1,536
The Harris Products Group \| Operating Segments
Financial information for the reportable segments
Net sales (Note 2)	124,430	131,179
Adjusted EBIT	19,878	18,983
Special items charge	1,536	0
EBIT	18,342	18,983
The Harris Products Group \| Inter-segment
Financial information for the reportable segments
Net sales (Note 2)	$ 3,093	$ 2,897

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