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v3.20.2

BASIS OF PRESENTATION (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Basis of Presentation [Line Items] |  |  |  |
Other components of net periodic pension (cost) income | $ (1,064) | $ 628 | $ (1,967) | $ 2,169

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- Definition [Line Items] for Basis of Presentation [Table] + References No definition available. + Details
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Namespace Prefix: | leco_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of defined benefit plan cost (credit), classified as other. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanOtherCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration