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SEGMENT INFORMATION (Financial Information of Reportable Segments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Financial information for the reportable segments
Net sales (Note 2)	$ 935,240	$ 806,454	$ 2,830,277	$ 2,389,929
Revenue from Related Parties	0	0	0	0
Segment, including Inter-segment, sales	935,240	806,454	2,830,277	2,389,929
Adjusted EBIT	156,776	124,865	487,242	365,994
Special items charge (Gain)	11,079	80,736	9,306	95,829
EBIT	145,697	44,129	477,936	270,165
Interest income	376	333	980	1,185
Interest expense	(8,586)	(6,047)	(21,847)	(17,921)
Income before income taxes	137,487	38,415	457,069	253,429
Rationalization and asset impairment net gains			(7,776)	1,162
Rationalization and asset impairment charges (gains)	8,364	3,484	9,405	8,277
Corporate/Eliminations
Financial information for the reportable segments
Net sales (Note 2)	0	0	0	0
Revenue from Related Parties	(47,989)	(46,503)	(126,859)	(134,629)
Segment, including Inter-segment, sales	(47,989)	(46,503)	(126,859)	(134,629)
Adjusted EBIT	(1,685)	(4,704)	(10,470)	(10,048)
Special items charge (Gain)	3,068	0	3,068	1,923
EBIT	(4,753)	(4,704)	(13,538)	(11,971)
Acquisition Costs	3,068		3,086	1,923
Americas Welding
Financial information for the reportable segments
Rationalization and asset impairment net gains			998
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment			3,735
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment		73,562		79,652
Business Combination, Inventory Step Up	(353)		1,106
Americas Welding | Operating Segments
Financial information for the reportable segments
Net sales (Note 2)	585,628	461,508	1,715,342	1,344,218
Revenue from Related Parties	35,353	37,480	92,540	109,993
Segment, including Inter-segment, sales	620,981	498,988	1,807,882	1,454,211
Adjusted EBIT	118,804	84,557	348,439	245,308
Special items charge (Gain)	(353)	73,574	(3,627)	79,664
EBIT	119,157	10,983	352,066	165,644
International Welding
Financial information for the reportable segments
Rationalization and asset impairment charges (gains)	8,364	3,484	10,403	8,277
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment				446
International Welding | Operating Segments
Financial information for the reportable segments
Net sales (Note 2)	216,497	227,165	711,167	702,596
Revenue from Related Parties	9,994	7,078	25,749	18,260
Segment, including Inter-segment, sales	226,491	234,243	736,916	720,856
Adjusted EBIT	25,225	29,032	97,321	77,845
Special items charge (Gain)	8,364	6,615	9,865	13,695
EBIT	16,861	22,417	87,456	64,150
The Harris Products Group | Operating Segments
Financial information for the reportable segments
Net sales (Note 2)	133,115	117,781	403,768	343,115
Revenue from Related Parties	2,642	1,945	8,570	6,376
Segment, including Inter-segment, sales	135,757	119,726	412,338	349,491
Adjusted EBIT	14,432	15,980	51,952	52,889
Special items charge (Gain)	0	547	0	547
EBIT	$ 14,432	15,433	$ 51,952	52,342
International Welding and Harris Products Group [Member]
Financial information for the reportable segments
Business Combination, Inventory Step Up		$ 3,690		$ 5,531

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