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Executive Benefits Agreements and Employees Savings Plans - Life Insurance Premiums (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Compensation Related Costs [Abstract] |  |  |
Cost of life insurance premiums | $ 1,224 lxu_CostOfLifeInsurancePremiumsIncludedInSellingGeneralAndAdministrativeExpenseGross | $ 1,159 lxu_CostOfLifeInsurancePremiumsIncludedInSellingGeneralAndAdministrativeExpenseGross | $ 851 lxu_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 | $ 472 lxu_CostOfLifeInsurancePremiumsIncludedInSellingGeneralAndAdministrativeExpenseNet | $ 414 lxu_CostOfLifeInsurancePremiumsIncludedInSellingGeneralAndAdministrativeExpenseNet | $ 372 lxu_CostOfLifeInsurancePremiumsIncludedInSellingGeneralAndAdministrativeExpenseNet

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- Definition Gross cost of life insurance premiums included in SG&A during the reporting period. + References No definition available. + Details
Name: | lxu_CostOfLifeInsurancePremiumsIncludedInSellingGeneralAndAdministrativeExpenseGross
Namespace Prefix: | lxu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Net cost of life insurance premiums included in SG&A during the reporting period. + References No definition available. + Details
Name: | lxu_CostOfLifeInsurancePremiumsIncludedInSellingGeneralAndAdministrativeExpenseNet
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

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- 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
Name: | us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration