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Segment Information - Segment Financial Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Net sales	$ 193,858us-gaap_SalesRevenueNet	$ 178,525us-gaap_SalesRevenueNet
Gross profit	42,359us-gaap_GrossProfit	48,722us-gaap_GrossProfit
Operating income	14,223us-gaap_OperatingIncomeLoss	25,861us-gaap_OperatingIncomeLoss
Interest expense, net	3,398us-gaap_InterestExpense	6,708us-gaap_InterestExpense
Non-operating expense (income), net	(35)us-gaap_OtherNonoperatingIncomeExpense	(77)us-gaap_OtherNonoperatingIncomeExpense
Provisions for income taxes	4,181us-gaap_IncomeTaxExpenseBenefit	7,654us-gaap_IncomeTaxExpenseBenefit
Equity in earnings of affiliate - Climate Control		(67)us-gaap_IncomeLossFromEquityMethodInvestments
Income from continuing operations	6,679us-gaap_IncomeLossFromContinuingOperations	11,643us-gaap_IncomeLossFromContinuingOperations
Corporate [Member]
Segment Reporting Information [Line Items]
Operating income	(6,747)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember	(7,671)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember
Chemical [Member]
Segment Reporting Information [Line Items]
Net sales	126,814us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember	115,221us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember
Gross profit	21,830us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember	28,426us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember
Non-operating expense (income), net	(33)us-gaap_OtherNonoperatingIncomeExpense / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember	(77)us-gaap_OtherNonoperatingIncomeExpense / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember
Chemical [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income	16,660us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember	28,813us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember
Climate Control [Member]
Segment Reporting Information [Line Items]
Net sales	65,198us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember	60,349us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember
Gross profit	19,962us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember	19,264us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember
Equity in earnings of affiliate - Climate Control		(67)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember
Climate Control [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income	4,312us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember	4,332us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember
Other [Member]
Segment Reporting Information [Line Items]
Net sales	1,846us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember	2,955us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Gross profit	567us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember	1,032us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income	(2)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember	387us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Non-operating expense (income), net	$ (2)us-gaap_OtherNonoperatingIncomeExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateAndOtherMember

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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