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Executive Benefit Agreements and Employee Savings Plans (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | ---
Death Benefit Agreement [Line Items] |  |
Accrued death benefits - All agreements | $ 4,017 | $ 4,058
Total undiscounted executive benefits - 1992 Agreements | 1,950 | 1,963
Discount rates utilized - 1992 Agreements | 3.58% | 4.17%
Accrued executive benefits - 1992 Agreements | 1,262 | 1,187
Death Benefit 1981 Agreements [Member] |  |
Death Benefit Agreement [Line Items] |  |
Undiscounted death benefits | 4,115 | 4,115
Death Benefit 1992 Agreements [Member] |  |
Death Benefit Agreement [Line Items] |  |
Undiscounted death benefits | 302 | 302
Death Benefit 2005 Agreement [Member] |  |
Death Benefit Agreement [Line Items] |  |
Undiscounted death benefits | $ 2,500 | $ 2,500

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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
- Details
Name: | lxu_DeathBenefitAgreementLineItems
Namespace Prefix: | lxu_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Discount rate utilized to determine the present value of future executive benefits payment obligation associated with certain executive benefit agreements. + References No definition available. + Details
Name: | lxu_DiscountRatesUtilized
Namespace Prefix: | lxu_
Data Type: | num:percentItemType
Balance Type: | na
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