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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
	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

X

- References

No definition available.

+ Details

Name:	us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration