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Long-Term Debt - Schedule of Long-Term Debt (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Long-term debt $ 455,736us-gaap_DebtAndCapitalLeaseObligations $ 457,318us-gaap_DebtAndCapitalLeaseObligations
Less current portion of long-term debt 25,499us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent 10,680us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent
Long-term debt due after one year 430,237us-gaap_LongTermDebtAndCapitalLeaseObligations 446,638us-gaap_LongTermDebtAndCapitalLeaseObligations
Working Capital Revolver Loan [Member]    
Debt Instrument [Line Items]    
Long-term debt 0us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= lxu_WorkingCapitalRevolverLoanMember
0us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= lxu_WorkingCapitalRevolverLoanMember
7.75% Senior Secured Notes Due 2019 [Member]    
Debt Instrument [Line Items]    
Long-term debt 425,000us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= lxu_SevenPointSevenFivePercentageSeniorNotesMember
425,000us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= lxu_SevenPointSevenFivePercentageSeniorNotesMember
Secured Promissory Note Due 2016 [Member]    
Debt Instrument [Line Items]    
Long-term debt 21,091us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= lxu_SecuredPromissoryNoteMember
22,814us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= lxu_SecuredPromissoryNoteMember
Other [Member]    
Debt Instrument [Line Items]    
Long-term debt $ 9,645us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= lxu_OtherLongTermDebtMember
$ 9,504us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= lxu_OtherLongTermDebtMember