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Executive Benefits Agreements and Employees Savings Plans - Life Insurance Premiums (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Compensation Related Costs [Abstract]
Cost of life insurance premiums	$ 1,224lxu_CostOfLifeInsurancePremiumsIncludedInSellingGeneralAndAdministrativeExpenseGross	$ 1,159lxu_CostOfLifeInsurancePremiumsIncludedInSellingGeneralAndAdministrativeExpenseGross	$ 851lxu_CostOfLifeInsurancePremiumsIncludedInSellingGeneralAndAdministrativeExpenseGross
Increases in cash surrender values	(752)us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValue	(745)us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValue	(479)us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValue
Net cost of life insurance premiums included in SG&A	$ 472lxu_CostOfLifeInsurancePremiumsIncludedInSellingGeneralAndAdministrativeExpenseNet	$ 414lxu_CostOfLifeInsurancePremiumsIncludedInSellingGeneralAndAdministrativeExpenseNet	$ 372lxu_CostOfLifeInsurancePremiumsIncludedInSellingGeneralAndAdministrativeExpenseNet

X

- Definition

Gross cost of life insurance premiums included in SG&A during the reporting period.

+ References

No definition available.

+ Details

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Namespace Prefix:	lxu_
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X

- Definition

Net cost of life insurance premiums included in SG&A during the reporting period.

+ References

No definition available.

+ Details

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Namespace Prefix:	lxu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- Details

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

X

- Definition

The change in cash surrender or contract value during the period which adjusted the amount of premiums paid in determining the expense or income recognized under the contract for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 325

-SubTopic 30

-Section 35

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6384439&loc=d3e42048-111605

+ Details

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