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v2.4.1.9

FAIR VALUE (Textual) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013
Assets and liabilities measured at fair value on a recurring basis |  |
Weighted average discount rate (percent) | 15.90%leco_PercentageOfRiskAdjustedCostOfCapital |
Period of estimated sales as basis for contingent consideration (in years) | 3 years |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease) | $ 8,244 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPeriodIncreaseDecrease |
Percentage of Cost of Debt | 3.50%leco_PercentageOfCostOfDebt |
Other Assets, Current | 158,432 us-gaap_OtherAssetsCurrent | 102,931 us-gaap_OtherAssetsCurrent
Other Liabilities, Current | 27,070 us-gaap_OtherLiabilitiesCurrent | 1,129 us-gaap_OtherLiabilitiesCurrent
SSCO Manufacturing, Inc. (d/b/a Arc Products) |  |
Assets and liabilities measured at fair value on a recurring basis |  |
Period of estimated sales as basis for contingent consideration (in years) | 5 years |
Non-cash accretion of contingent consideration | 1,537 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_BusinessAcquisitionAxis = leco_SscoManufacturingIncMember |
Contingent consideration | 6,912 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = leco_SscoManufacturingIncMember |
Minimum [Member] |  |
Assets and liabilities measured at fair value on a recurring basis |  |
Weighted Average Compound Annual EBIT Growth Rate | 16.50%leco_WeightedAverageCompoundAnnualEBITGrowthRate / us-gaap_RangeAxis = us-gaap_MinimumMember |
Maximum |  |
Assets and liabilities measured at fair value on a recurring basis |  |
Weighted Average Compound Annual EBIT Growth Rate | 37.80%leco_WeightedAverageCompoundAnnualEBITGrowthRate / us-gaap_RangeAxis = us-gaap_MaximumMember |
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets and liabilities measured at fair value on a recurring basis |  |
Contingent consideration | 6,912 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 5,375 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value | 25,268 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 16,974 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Assets Held-for-sale [Member] |  |
Assets and liabilities measured at fair value on a recurring basis |  |
Other Assets, Current | 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 |

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