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Executive Benefits Agreements and Employees Savings Plans - Executive Benefit Agreements (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Compensation Related Costs [Abstract] |  |
Total undiscounted death benefits | $ 6,417 lxu_UndiscountedDeathBenefits | $ 6,417 lxu_UndiscountedDeathBenefits
Total accrued death benefits | 4,054 lxu_AccruedDeathBenefits | 4,121 lxu_AccruedDeathBenefits
Total undiscounted executive benefits | 1,900 lxu_UndiscountedExecutiveBenefits | 1,904 lxu_UndiscountedExecutiveBenefits
Total accrued executive benefits | $ 1,363 lxu_AccruedExecutiveBenefits | $ 1,280 lxu_AccruedExecutiveBenefits

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- Definition The aggregate accrued death benefits related to all executive benefit agreements as of the balance sheet date. + References No definition available. + Details
Name: | lxu_AccruedDeathBenefits
Namespace Prefix: | lxu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The aggregate discounted accrued executive benefits obligation related to certain agreements as of the balance sheet date. + References No definition available. + Details
Name: | lxu_AccruedExecutiveBenefits
Namespace Prefix: | lxu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The aggregate undiscounted death benefits related to certain executive benefit agreements as of the balance sheet date. + References No definition available. + Details
Name: | lxu_UndiscountedDeathBenefits
Namespace Prefix: | lxu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The aggregate undiscounted executive benefits obligation related to certain agreements as of the balance sheet date. + References No definition available. + Details
Name: | lxu_UndiscountedExecutiveBenefits
Namespace Prefix: | lxu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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