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SEGMENT INFORMATION (Financial Information of Reportable Segments) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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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
Financial information for the reportable segments |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 683,954 us-gaap_SalesRevenueGoodsNet | $ 715,777 us-gaap_SalesRevenueGoodsNet | $ 728,531 us-gaap_SalesRevenueGoodsNet | $ 685,062 us-gaap_SalesRevenueGoodsNet | $ 714,791 us-gaap_SalesRevenueGoodsNet | $ 691,875 us-gaap_SalesRevenueGoodsNet | $ 727,432 us-gaap_SalesRevenueGoodsNet | $ 718,573 us-gaap_SalesRevenueGoodsNet | $ 2,813,324 us-gaap_SalesRevenueGoodsNet | $ 2,852,671 us-gaap_SalesRevenueGoodsNet | $ 2,853,367 us-gaap_SalesRevenueGoodsNet
Revenue from Related Parties |  |  |  |  |  |  |  |  | 0 us-gaap_RevenueFromRelatedParties | 0 us-gaap_RevenueFromRelatedParties | 0 us-gaap_RevenueFromRelatedParties
Segment, including Inter-segment, sales |  |  |  |  |  |  |  |  | 2,813,324 us-gaap_Revenues | 2,852,671 us-gaap_Revenues | 2,853,367 us-gaap_Revenues
EBIT, as adjusted |  |  |  |  |  |  |  |  | 434,340 leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted | 437,351 leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted | 380,508 leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted
Special items charge (Gain) |  |  |  |  |  |  |  |  | 51,186 leco_SpecialItemsChargeGain | 21,366 leco_SpecialItemsChargeGain | 10,735 leco_SpecialItemsChargeGain
EBIT |  |  |  |  |  |  |  |  | 383,154 us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet | 415,985 us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet | 369,773 us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet
Interest income |  |  |  |  |  |  |  |  | 3,093 us-gaap_InvestmentIncomeInterest | 3,320 us-gaap_InvestmentIncomeInterest | 3,988 us-gaap_InvestmentIncomeInterest
Interest expense |  |  |  |  |  |  |  |  | (10,434)us-gaap_InterestExpense | (2,864)us-gaap_InterestExpense | (4,191)us-gaap_InterestExpense
Income before income taxes | 100,736 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 77,785 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 114,866 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 82,426 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 121,388 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 97,840 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 106,534 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 90,679 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 375,813 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 416,441 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 369,570 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Total assets | 1,939,215 us-gaap_Assets |  |  |  | 2,151,867 us-gaap_Assets |  |  |  | 1,939,215 us-gaap_Assets | 2,151,867 us-gaap_Assets | 2,089,863 us-gaap_Assets
Equity investments in affiliates | 27,481 us-gaap_EquityMethodInvestments |  |  |  | 26,618 us-gaap_EquityMethodInvestments |  |  |  | 27,481 us-gaap_EquityMethodInvestments | 26,618 us-gaap_EquityMethodInvestments | 24,606 us-gaap_EquityMethodInvestments
Capital expenditures |  |  |  |  |  |  |  |  | 72,990 us-gaap_PaymentsToAcquireProductiveAssets | 76,015 us-gaap_PaymentsToAcquireProductiveAssets | 52,715 us-gaap_PaymentsToAcquireProductiveAssets
Depreciation and amortization |  |  |  |  |  |  |  |  | 69,607 us-gaap_DepreciationDepletionAndAmortization | 68,883 us-gaap_DepreciationDepletionAndAmortization | 65,334 us-gaap_DepreciationDepletionAndAmortization
North America Welding |  |  |  |  |  |  |  |  |  |  |
Financial information for the reportable segments |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 1,700,924 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 1,652,769 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 1,580,818 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember
Revenue from Related Parties |  |  |  |  |  |  |  |  | 124,732 us-gaap_RevenueFromRelatedParties / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 127,254 us-gaap_RevenueFromRelatedParties / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 131,062 us-gaap_RevenueFromRelatedParties / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember
Segment, including Inter-segment, sales |  |  |  |  |  |  |  |  | 1,825,656 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 1,780,023 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 1,711,880 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember
EBIT, as adjusted |  |  |  |  |  |  |  |  | 335,465 leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 318,507 leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 293,070 leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember
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
EBIT |  |  |  |  |  |  |  |  | 335,533 us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 317,455 us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 292,243 us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember
Total assets | 1,111,065 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember |  |  |  | 1,048,412 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember |  |  |  | 1,111,065 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 1,048,412 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 980,093 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember
Equity investments in affiliates | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember |  |  |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember |  |  |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember
Capital expenditures |  |  |  |  |  |  |  |  | 51,691 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 41,181 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 36,834 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember
Depreciation and amortization |  |  |  |  |  |  |  |  | 43,659 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 39,086 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember | 33,479 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = leco_NorthAmericaWeldingMember
Europe Welding |  |  |  |  |  |  |  |  |  |  |
Financial information for the reportable segments |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 425,775 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 429,548 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 452,227 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember
Revenue from Related Parties |  |  |  |  |  |  |  |  | 19,586 us-gaap_RevenueFromRelatedParties / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 19,911 us-gaap_RevenueFromRelatedParties / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 16,048 us-gaap_RevenueFromRelatedParties / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember
Segment, including Inter-segment, sales |  |  |  |  |  |  |  |  | 445,361 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 449,459 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 468,275 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember
EBIT, as adjusted |  |  |  |  |  |  |  |  | 48,822 leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 36,247 leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 37,299 leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember
Special items charge (Gain) |  |  |  |  |  |  |  |  | 904 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 2,045 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 3,534 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember
EBIT |  |  |  |  |  |  |  |  | 47,918 us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 34,202 us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 33,765 us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember
Total assets | 359,337 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember |  |  |  | 403,094 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember |  |  |  | 359,337 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 403,094 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 451,654 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember
Equity investments in affiliates | 23,902 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember |  |  |  | 23,315 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember |  |  |  | 23,902 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 23,315 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 21,798 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember
Capital expenditures |  |  |  |  |  |  |  |  | 5,619 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 10,305 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 5,372 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember
Depreciation and amortization |  |  |  |  |  |  |  |  | 10,823 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 10,933 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember | 11,008 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = leco_EuropeWeldingMember
Asia Pacific Welding |  |  |  |  |  |  |  |  |  |  |
Financial information for the reportable segments |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 243,800 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 266,282 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 324,482 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember
Revenue from Related Parties |  |  |  |  |  |  |  |  | 14,820 us-gaap_RevenueFromRelatedParties / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 14,906 us-gaap_RevenueFromRelatedParties / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 14,829 us-gaap_RevenueFromRelatedParties / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember
Segment, including Inter-segment, sales |  |  |  |  |  |  |  |  | 258,620 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 281,188 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 339,311 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember
EBIT, as adjusted |  |  |  |  |  |  |  |  | 1,321 leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 1,815 leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 7,247 leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember
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
EBIT |  |  |  |  |  |  |  |  | (27,314)us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | (4,256)us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 2,254 us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember
Total assets | 284,573 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember |  |  |  | 325,656 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember |  |  |  | 284,573 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 325,656 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 350,189 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember
Equity investments in affiliates | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember |  |  |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember |  |  |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember
Capital expenditures |  |  |  |  |  |  |  |  | 3,959 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 2,073 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 8,833 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember
Depreciation and amortization |  |  |  |  |  |  |  |  | 9,799 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 13,559 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember | 15,102 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = leco_AsiaPacificWeldingMember
South America Welding |  |  |  |  |  |  |  |  |  |  |
Financial information for the reportable segments |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 148,595 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 195,895 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 161,483 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember
Revenue from Related Parties |  |  |  |  |  |  |  |  | 144 us-gaap_RevenueFromRelatedParties / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 233 us-gaap_RevenueFromRelatedParties / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 38 us-gaap_RevenueFromRelatedParties / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember
Segment, including Inter-segment, sales |  |  |  |  |  |  |  |  | 148,739 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 196,128 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 161,521 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember
EBIT, as adjusted |  |  |  |  |  |  |  |  | 15,953 leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 57,306 leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 18,301 leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember
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
EBIT |  |  |  |  |  |  |  |  | (5,762)us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 45,108 us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 16,920 us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember
Total assets | 138,114 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember |  |  |  | 169,027 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember |  |  |  | 138,114 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 169,027 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 134,650 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember
Equity investments in affiliates | 3,579 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember |  |  |  | 3,303 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember |  |  |  | 3,579 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 3,303 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 2,808 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember
Capital expenditures |  |  |  |  |  |  |  |  | 10,896 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 20,840 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 899 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember
Depreciation and amortization |  |  |  |  |  |  |  |  | 2,085 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 1,893 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember | 1,878 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = leco_SouthAmericaWeldingMember
The Harris Products Group |  |  |  |  |  |  |  |  |  |  |
Financial information for the reportable segments |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 294,230 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 308,177 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 334,357 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember
Revenue from Related Parties |  |  |  |  |  |  |  |  | 8,210 us-gaap_RevenueFromRelatedParties / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 9,605 us-gaap_RevenueFromRelatedParties / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 8,549 us-gaap_RevenueFromRelatedParties / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember
Segment, including Inter-segment, sales |  |  |  |  |  |  |  |  | 302,440 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 317,782 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 342,906 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember
EBIT, as adjusted |  |  |  |  |  |  |  |  | 28,563 leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 27,826 leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 29,477 leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember
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
EBIT |  |  |  |  |  |  |  |  | 28,563 us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 27,826 us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 29,477 us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember
Total assets | 147,990 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember |  |  |  | 162,496 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember |  |  |  | 147,990 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 162,496 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 195,881 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember
Equity investments in affiliates | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember |  |  |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember |  |  |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember
Capital expenditures |  |  |  |  |  |  |  |  | 825 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 3,931 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 831 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember
Depreciation and amortization |  |  |  |  |  |  |  |  | 3,512 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 3,636 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember | 3,934 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = leco_HarrisProductsGroupMember
Corporate / Eliminations |  |  |  |  |  |  |  |  |  |  |
Financial information for the reportable segments |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 0 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | 0 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | 0 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember
Revenue from Related Parties |  |  |  |  |  |  |  |  | (167,492)us-gaap_RevenueFromRelatedParties / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | (171,909)us-gaap_RevenueFromRelatedParties / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | (170,526)us-gaap_RevenueFromRelatedParties / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember
Segment, including Inter-segment, sales |  |  |  |  |  |  |  |  | (167,492)us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | (171,909)us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | (170,526)us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember
EBIT, as adjusted |  |  |  |  |  |  |  |  | 4,216 leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | (4,350)leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | (4,886)leco_IncomeLossBeforeInterestAndIncomeTaxesAdjusted / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember
Special items charge (Gain) |  |  |  |  |  |  |  |  | 0 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | 0 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | 0 leco_SpecialItemsChargeGain / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember
EBIT |  |  |  |  |  |  |  |  | 4,216 us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | (4,350)us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | (4,886)us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember
Total assets | (101,864)us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember |  |  |  | 43,182 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember |  |  |  | (101,864)us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | 43,182 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | (22,604)us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember
Equity investments in affiliates | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember |  |  |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember |  |  |  | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember
Capital expenditures |  |  |  |  |  |  |  |  | 0 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | (2,315)us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | (54)us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember
Depreciation and amortization |  |  |  |  |  |  |  |  | $ (271)us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | $ (224)us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | $ (67)us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember

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