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Derivatives, Hedges, Financial Instruments and Carbon Credits - Schedule of Carrying Values and Estimated Fair Values of Financial Instruments (Parenthetical) (Detail) | 9 Months Ended
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Sep. 30, 2018 $ / shares
Derivative Instruments And Hedging Activities Disclosure [Abstract] |
Notes based on quoted price | $ 105.25

X
- Definition Fair value offer quoted price. + References No definition available. + Details
Name: | lxu_FairValueOfferQuotedPrice
Namespace Prefix: | lxu_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration