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Segment Information - Segment Financial Information (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 181,277 us-gaap_SalesRevenueNet | $ 171,046 us-gaap_SalesRevenueNet | $ 201,662 us-gaap_SalesRevenueNet | $ 178,525 us-gaap_SalesRevenueNet | $ 149,035 us-gaap_SalesRevenueNet | $ 177,350 us-gaap_SalesRevenueNet | $ 202,223 us-gaap_SalesRevenueNet | $ 150,679 us-gaap_SalesRevenueNet | $ 732,510 us-gaap_SalesRevenueNet | $ 679,287 us-gaap_SalesRevenueNet | $ 759,031 us-gaap_SalesRevenueNet
Gross profit | 31,378 us-gaap_GrossProfit | 24,386 us-gaap_GrossProfit | 48,869 us-gaap_GrossProfit | 48,722 us-gaap_GrossProfit | 30,566 us-gaap_GrossProfit | 48,909 us-gaap_GrossProfit | 38,659 us-gaap_GrossProfit | 25,422 us-gaap_GrossProfit | 153,355 us-gaap_GrossProfit | 143,556 us-gaap_GrossProfit | 183,736 us-gaap_GrossProfit
Operating income |  |  |  |  |  |  |  |  | 53,362 us-gaap_OperatingIncomeLoss | 105,308 us-gaap_OperatingIncomeLoss | 95,655 us-gaap_OperatingIncomeLoss
Interest expense, net |  |  |  |  |  |  |  |  | 21,599 us-gaap_InterestExpense | 13,986 us-gaap_InterestExpense | 4,237 us-gaap_InterestExpense
Losses on extinguishment of debt |  |  |  |  |  |  |  |  |  | 1,296 us-gaap_GainsLossesOnExtinguishmentOfDebt |
Non-operating expense (income), net |  |  |  |  |  |  |  |  | (281)us-gaap_OtherNonoperatingIncomeExpense | (100)us-gaap_OtherNonoperatingIncomeExpense | (281)us-gaap_OtherNonoperatingIncomeExpense
Provisions for income taxes |  |  |  |  |  |  |  |  | 12,400 us-gaap_IncomeTaxExpenseBenefit | 35,421 us-gaap_IncomeTaxExpenseBenefit | 33,594 us-gaap_IncomeTaxExpenseBenefit
Equity in earnings of affiliate-Climate Control |  |  |  |  |  |  |  |  | (79)us-gaap_IncomeLossFromEquityMethodInvestments | (436)us-gaap_IncomeLossFromEquityMethodInvestments | (681)us-gaap_IncomeLossFromEquityMethodInvestments
Income from continuing operations | 718 us-gaap_IncomeLossFromContinuingOperations | (3,772)us-gaap_IncomeLossFromContinuingOperations | 11,134 us-gaap_IncomeLossFromContinuingOperations | 11,643 us-gaap_IncomeLossFromContinuingOperations | 37,473 us-gaap_IncomeLossFromContinuingOperations | 10,250 us-gaap_IncomeLossFromContinuingOperations | 7,486 us-gaap_IncomeLossFromContinuingOperations | (68)us-gaap_IncomeLossFromContinuingOperations | 19,723 us-gaap_IncomeLossFromContinuingOperations | 55,141 us-gaap_IncomeLossFromContinuingOperations | 58,786 us-gaap_IncomeLossFromContinuingOperations
Corporate [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | (21,365)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | (14,561)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | (14,371)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember
Chemical [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 454,902 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember | 380,669 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember | 477,813 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember
Gross profit |  |  |  |  |  |  |  |  | 66,565 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember | 46,165 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember | 97,692 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember
Non-operating expense (income), net |  |  |  |  |  |  |  |  | (249)us-gaap_OtherNonoperatingIncomeExpense / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember | (1)us-gaap_OtherNonoperatingIncomeExpense / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember | (1)us-gaap_OtherNonoperatingIncomeExpense / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember
Chemical [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 51,281 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember | 87,784 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember | 82,101 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember
Chemical [Member] | Agricultural Products [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 215,523 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_AgriculturalProductsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember | 167,614 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_AgriculturalProductsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember | 217,329 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_AgriculturalProductsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember
Chemical [Member] | Industrial Acids and Other Chemical Products [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 160,104 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_IndustrialAcidsAndOtherChemicalProductsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember | 141,936 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_IndustrialAcidsAndOtherChemicalProductsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember | 162,498 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_IndustrialAcidsAndOtherChemicalProductsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember
Chemical [Member] | Mining Products [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 67,043 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_MiningProductsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember | 63,042 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_MiningProductsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember | 96,538 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_MiningProductsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember
Chemical [Member] | Other Products [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 12,232 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_OtherProductsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember | 8,077 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_OtherProductsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember | 1,448 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_OtherProductsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ChemicalMember
Climate Control [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 265,358 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember | 285,018 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember | 266,171 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember
Gross profit |  |  |  |  |  |  |  |  | 82,443 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember | 92,907 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember | 80,981 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember
Non-operating expense (income), net |  |  |  |  |  |  |  |  |  | (1)us-gaap_OtherNonoperatingIncomeExpense / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember | (1)us-gaap_OtherNonoperatingIncomeExpense / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember
Equity in earnings of affiliate-Climate Control |  |  |  |  |  |  |  |  | (79)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember | (436)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember | (681)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember
Climate Control [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 21,675 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember | 30,386 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember | 25,834 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember
Climate Control [Member] | Water Source and Geothermal Heat Pumps [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 168,804 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_GeothermalAndWaterSourceHeatPumpsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember | 183,757 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_GeothermalAndWaterSourceHeatPumpsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember | 162,697 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_GeothermalAndWaterSourceHeatPumpsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember
Climate Control [Member] | Hydronic Fan Coils [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 61,307 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_HydronicFanCoilsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember | 64,541 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_HydronicFanCoilsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember | 55,812 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_HydronicFanCoilsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember
Climate Control [Member] | Other HVAC Products [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 35,247 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_OtherHvcProductsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember | 36,720 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_OtherHvcProductsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember | 47,662 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = lxu_OtherHvcProductsMember / us-gaap_StatementBusinessSegmentsAxis = lxu_ClimateControlMember
Other [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 12,250 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 13,600 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 15,047 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Gross profit |  |  |  |  |  |  |  |  | 4,347 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 4,484 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 5,063 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 1,771 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 1,699 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 2,091 us-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 |  |  |  |  |  |  |  |  | $ (32)us-gaap_OtherNonoperatingIncomeExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateAndOtherMember | $ (98)us-gaap_OtherNonoperatingIncomeExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateAndOtherMember | $ (279)us-gaap_OtherNonoperatingIncomeExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateAndOtherMember

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