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GOODWILL AND INTANGIBLES - Changes in Carrying Amount of Goodwill by Reportable Segment (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024
Changes in the carrying amount of goodwill by reportable segment |  |
Balance at the beginning of the period | $ 804,927 | $ 694,452
Additions and adjustments | 56,913 | 135,084
Foreign currency translation | 24,846 | (24,609)
Balance at the end of the period | 886,686 | 804,927
Americas Welding |  |
Changes in the carrying amount of goodwill by reportable segment |  |
Balance at the beginning of the period | 585,814 | 497,600
Additions and adjustments | (662) | 101,657
Foreign currency translation | 8,048 | (13,443)
Balance at the end of the period | 593,200 | 585,814
International Welding |  |
Changes in the carrying amount of goodwill by reportable segment |  |
Balance at the beginning of the period | 176,262 | 153,479
Additions and adjustments | 57,575 | 33,427
Foreign currency translation | 16,220 | (10,644)
Balance at the end of the period | 250,057 | 176,262
The Harris Products Group |  |
Changes in the carrying amount of goodwill by reportable segment |  |
Balance at the beginning of the period | 42,851 | 43,373
Additions and adjustments | 0 | 0
Foreign currency translation | 578 | (522)
Balance at the end of the period | $ 43,429 | $ 42,851

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