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GOODWILL AND INTANGIBLES (Gross and Net Intangible Assets Other Than Goodwill) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013
Gross intangible assets other than goodwill by asset class |  |
Asset Impairment Charges | $ 32,742 us-gaap_AssetImpairmentCharges |
Gross Amount | 181,713 us-gaap_FiniteLivedIntangibleAssetsGross | 186,940 us-gaap_FiniteLivedIntangibleAssetsGross
Accumulated Amortization | 65,625 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization | 58,238 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Indefinite Lived Assets | 16,273 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill | 18,310 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Total Intangible, Net | 132,361 us-gaap_IntangibleAssetsNetExcludingGoodwill | 147,012 us-gaap_IntangibleAssetsNetExcludingGoodwill
Trademarks and trade names |  |
Gross intangible assets other than goodwill by asset class |  |
Gross Amount | 32,358 us-gaap_FiniteLivedIntangibleAssetsGross / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember | 38,566 us-gaap_FiniteLivedIntangibleAssetsGross / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember
Accumulated Amortization | 12,547 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember | 11,898 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember
Indefinite Lived Assets | 16,273 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember | 18,310 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember
Total Intangible, Net | 36,084 us-gaap_IntangibleAssetsNetExcludingGoodwill / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember | 44,978 us-gaap_IntangibleAssetsNetExcludingGoodwill / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember
Weighted average life (in years) | 12 years |
Customer relationships |  |
Gross intangible assets other than goodwill by asset class |  |
Gross Amount | 70,658 us-gaap_FiniteLivedIntangibleAssetsGross / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember | 74,935 us-gaap_FiniteLivedIntangibleAssetsGross / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
Accumulated Amortization | 19,923 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember | 16,837 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
Indefinite Lived Assets | 0 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember | 0 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
Total Intangible, Net | 50,735 us-gaap_IntangibleAssetsNetExcludingGoodwill / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember | 58,098 us-gaap_IntangibleAssetsNetExcludingGoodwill / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
Weighted average life (in years) | 14 years |
Patents |  |
Gross intangible assets other than goodwill by asset class |  |
Gross Amount | 24,195 us-gaap_FiniteLivedIntangibleAssetsGross / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_PatentsMember | 23,861 us-gaap_FiniteLivedIntangibleAssetsGross / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_PatentsMember
Accumulated Amortization | 6,509 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_PatentsMember | 6,205 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_PatentsMember
Indefinite Lived Assets | 0 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_PatentsMember | 0 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_PatentsMember
Total Intangible, Net | 17,686 us-gaap_IntangibleAssetsNetExcludingGoodwill / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_PatentsMember | 17,656 us-gaap_IntangibleAssetsNetExcludingGoodwill / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_PatentsMember
Weighted average life (in years) | 20 years |
Other |  |
Gross intangible assets other than goodwill by asset class |  |
Gross Amount | 54,502 us-gaap_FiniteLivedIntangibleAssetsGross / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember | 49,578 us-gaap_FiniteLivedIntangibleAssetsGross / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember
Accumulated Amortization | 26,646 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember | 23,298 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember
Indefinite Lived Assets | 0 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember | 0 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember
Total Intangible, Net | 27,856 us-gaap_IntangibleAssetsNetExcludingGoodwill / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember | 26,280 us-gaap_IntangibleAssetsNetExcludingGoodwill / leco_FiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember
Weighted average life (in years) | 13 years |
Finite-Lived Intangible Assets [Member] |  |
Gross intangible assets other than goodwill by asset class |  |
Asset Impairment Charges | $ 10,484 us-gaap_AssetImpairmentCharges / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_FiniteLivedIntangibleAssetsMember |

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