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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) | 9 Months Ended
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Sep. 30, 2013
Summary Of Significant Accounting Policies [Line Items] |
Balance in excess of FDIC-insured limits | $ 40,000,000
Non current restricted investments | 169,988,000
US Treasury [Member] |
Summary Of Significant Accounting Policies [Line Items] |
Non current restricted investments | 130,000,000
Original maturity period | 13 weeks
CD [Member] |
Summary Of Significant Accounting Policies [Line Items] |
Non current restricted investments | $ 40,000,000
Original maturity period | No longer than approximately 26 weeks
Minimum [Member] |
Summary Of Significant Accounting Policies [Line Items] |
Ownership interest in equity method investment | 20.00%
Maximum [Member] |
Summary Of Significant Accounting Policies [Line Items] |
Ownership interest in equity method investment | 50.00%

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- Definition The amount of cash and cash equivalents that are in excess of the FDIC-insured limit + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Certificate Of Deposit Original Maturity Period + References No definition available. + Details
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Namespace Prefix: | lxu_
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Balance Type: | na
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- Details
Name: | lxu_SummaryOfSignificantAccountingPoliciesLineItems
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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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- Definition The noncurrent cash, cash equivalents and investments that is restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits classified as long-term; that is not expected to be released from such existing restrictions within one year of the balance sheet date or operating cycle, whichever is longer. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. Includes noncurrent cash equivalents and investments that are similarly restricted as to withdrawal, usage or disposal. + References No definition available. + Details
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Balance Type: | debit
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