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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Summary Of Significant Accounting Policies [Line Items]
Balance in excess of FDIC-insured limits	$ 49.0lxu_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

X

- Definition

The balance of an asset deposited or invested that are in excess of the FDIC-insured limit.

+ References

No definition available.

+ Details

Name:	lxu_BalanceInExcessOfFdicInsuredLimits
Namespace Prefix:	lxu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- 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

X

- Details

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

X

- 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

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_ShortTermInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: