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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015
Summary Of Significant Accounting Policies [Line Items] |
Balance in excess of FDIC-insured limits | $ 49.0 lxu_BalanceInExcessOfFdicInsuredLimits
Minimum [Member] |
Summary Of Significant Accounting Policies [Line Items] |
Ownership interest in equity method investment | 20.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RangeAxis = us-gaap_MinimumMember
Maximum [Member] |
Summary Of Significant Accounting Policies [Line Items] |
Ownership interest in equity method investment | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RangeAxis = us-gaap_MaximumMember
Short-Term Investments [Member] |
Summary Of Significant Accounting Policies [Line Items] |
Original maturity period | No more than 26 weeks
Noncurrent Restricted Investments [Member] | CD [Member] |
Summary Of Significant Accounting Policies [Line Items] |
Original maturity period | No longer than approximately 26 weeks

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- Definition The balance of an asset deposited or invested that are in excess of the FDIC-insured limit. + References No definition available. + Details
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Namespace Prefix: | lxu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Certificate Of Deposit Original Maturity Period + References No definition available. + Details
Name: | lxu_CertificateOfDepositOriginalMaturityPeriod
Namespace Prefix: | lxu_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |