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RATIONALIZATION AND ASSET IMPAIRMENTS (Textual) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Rationalization and asset impairment charges (gains) | $ 166 us-gaap_RestructuringSettlementAndImpairmentProvisions | $ 29,068 us-gaap_RestructuringSettlementAndImpairmentProvisions | $ 836 us-gaap_RestructuringSettlementAndImpairmentProvisions | $ (17)us-gaap_RestructuringSettlementAndImpairmentProvisions | $ 259 us-gaap_RestructuringSettlementAndImpairmentProvisions | $ 1,627 us-gaap_RestructuringSettlementAndImpairmentProvisions | $ 851 us-gaap_RestructuringSettlementAndImpairmentProvisions | $ 1,051 us-gaap_RestructuringSettlementAndImpairmentProvisions | $ 30,053 us-gaap_RestructuringSettlementAndImpairmentProvisions | $ 8,463 us-gaap_RestructuringSettlementAndImpairmentProvisions | $ 9,354 us-gaap_RestructuringSettlementAndImpairmentProvisions
Special items charge (Gain) |  |  |  |  |  |  |  |  | 51,186 leco_SpecialItemsChargeGain | 21,366 leco_SpecialItemsChargeGain | 10,735 leco_SpecialItemsChargeGain
Restructuring charges |  |  |  |  |  |  |  |  | 1,241 us-gaap_RestructuringCharges | 3,658 us-gaap_RestructuringCharges |
Restructuring liability | 305 us-gaap_RestructuringReserve |  |  |  | 3,276 us-gaap_RestructuringReserve |  |  |  | 305 us-gaap_RestructuringReserve | 3,276 us-gaap_RestructuringReserve | 3,057 us-gaap_RestructuringReserve
Asset impairment charges |  |  |  |  |  |  |  |  | 32,742 us-gaap_AssetImpairmentCharges |  |
Special items, gain (loss) on the sale of assets at a rationalized operation |  |  |  |  |  |  |  |  | 3,930 leco_SpecialItemsRationalizationGainOnSaleOfAssets |  |
Other current assets | 158,432 us-gaap_OtherAssetsCurrent |  |  |  | 102,931 us-gaap_OtherAssetsCurrent |  |  |  | 158,432 us-gaap_OtherAssetsCurrent | 102,931 us-gaap_OtherAssetsCurrent |
Other Liabilities, Current | 27,070 us-gaap_OtherLiabilitiesCurrent |  |  |  | 1,129 us-gaap_OtherLiabilitiesCurrent |  |  |  | 27,070 us-gaap_OtherLiabilitiesCurrent | 1,129 us-gaap_OtherLiabilitiesCurrent |
Asia Pacific Welding 2014 Plan [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset impairment charges |  | 32,448 us-gaap_AssetImpairmentCharges / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWelding2014PlanMember |  |  |  |  |  |  | 32,617 us-gaap_AssetImpairmentCharges / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWelding2014PlanMember |  |
North America Welding |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Special items charge (Gain) |  |  |  |  |  |  |  |  | (68)leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 1,052 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 827 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember
Restructuring charges |  |  |  |  |  |  |  |  | (68)us-gaap_RestructuringCharges / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 1,052 us-gaap_RestructuringCharges / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 827 us-gaap_RestructuringCharges / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember
Restructuring liability | 0 us-gaap_RestructuringReserve / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember |  |  |  | 466 us-gaap_RestructuringReserve / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember |  |  |  | 0 us-gaap_RestructuringReserve / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 466 us-gaap_RestructuringReserve / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 0 us-gaap_RestructuringReserve / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember
Europe Welding 2014 Plan [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Special items charge (Gain) |  |  |  |  |  |  |  |  | 701 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWelding2014PlanMember |  |
Number of employees affected due to rationalization activities |  |  |  |  |  |  |  |  | 16 us-gaap_RestructuringAndRelatedCostExpectedNumberOfPositionsEliminated / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWelding2014PlanMember |  |
Europe Welding 2013 Plan [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Special items charge (Gain) |  |  |  |  |  |  |  |  | 347 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWelding2013PlanMember |  |
Europe Welding 2012 Plan [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | (144)us-gaap_RestructuringCharges / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWelding2012PlanMember |  |
Asia Pacific Welding |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Special items charge (Gain) |  |  |  |  |  |  |  |  | 28,635 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 6,071 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 4,993 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember
Restructuring charges |  |  |  |  |  |  |  |  | (184)us-gaap_RestructuringCharges / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 841 us-gaap_RestructuringCharges / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 3,151 us-gaap_RestructuringCharges / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember
Restructuring liability | 0 us-gaap_RestructuringReserve / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember |  |  |  | 375 us-gaap_RestructuringReserve / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember |  |  |  | 0 us-gaap_RestructuringReserve / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 375 us-gaap_RestructuringReserve / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 1,044 us-gaap_RestructuringReserve / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember
Asset impairment charges |  |  |  |  |  |  |  |  |  |  | 1,842 us-gaap_AssetImpairmentCharges / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember
Restructuring Charges Net |  |  |  |  |  |  |  |  |  | 922 leco_RestructuringChargesNet / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember |
Other Asset Impairment Charges |  |  |  |  |  | 4,675 us-gaap_OtherAssetImpairmentCharges / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember |  |  | 32,742 us-gaap_OtherAssetImpairmentCharges / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 4,444 us-gaap_OtherAssetImpairmentCharges / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember |
The Harris Products Group |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Special items charge (Gain) |  |  |  |  |  |  |  |  | 0 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 0 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 0 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember
Asia Pacific Welding 2012 Plan [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | (184)us-gaap_RestructuringCharges / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWelding2012PlanMember |  |
Asset impairment charges |  |  |  |  |  |  |  |  | 125 us-gaap_AssetImpairmentCharges / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWelding2012PlanMember |  |
Special items, gain (loss) on the sale of assets at a rationalized operation |  | 3,911 leco_SpecialItemsRationalizationGainOnSaleOfAssets / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWelding2012PlanMember |  |  |  |  |  |  | 3,911 leco_SpecialItemsRationalizationGainOnSaleOfAssets / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWelding2012PlanMember |  |
Restructuring Charges Net |  |  |  |  |  |  |  |  | (3,982)leco_RestructuringChargesNet / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWelding2012PlanMember |  |
South America Welding [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Special items charge (Gain) |  |  |  |  |  |  | 2,538 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 9,660 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 21,715 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 12,198 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 1,381 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember
Restructuring charges |  |  |  |  |  |  |  |  | 582 us-gaap_RestructuringCharges / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 0 us-gaap_RestructuringCharges / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember |
Restructuring liability | 0 us-gaap_RestructuringReserve / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember |  |  |  | 0 us-gaap_RestructuringReserve / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember |  |  |  | 0 us-gaap_RestructuringReserve / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 0 us-gaap_RestructuringReserve / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 0 us-gaap_RestructuringReserve / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember
Number of employees affected due to rationalization activities |  |  |  |  |  |  |  |  | 15 us-gaap_RestructuringAndRelatedCostExpectedNumberOfPositionsEliminated / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember |  |
Employee Severance |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | 1,241 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember |  |
Assets Held-for-sale [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Other current assets | 30,437 us-gaap_OtherAssetsCurrent / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = us-gaap_AssetsHeldForSaleMember |  |  |  |  |  |  |  | 30,437 us-gaap_OtherAssetsCurrent / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = us-gaap_AssetsHeldForSaleMember |  |
Other Liabilities, Current | $ 11,345 us-gaap_OtherLiabilitiesCurrent / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = us-gaap_AssetsHeldForSaleMember |  |  |  |  |  |  |  | $ 11,345 us-gaap_OtherLiabilitiesCurrent / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = us-gaap_AssetsHeldForSaleMember |  |

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- Definition Amount of expenses, net of asset impairments and gains or losses on sale of assets, associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References No definition available. + Details
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