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Segment Information (Additional Information) (Detail) (USD $)
12 Months Ended 3 Months Ended 0 Months Ended 3 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jun. 30, 2014
Jan. 30, 2015
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2013
Segment Reporting Information [Line Items]                
Net sales $ 535,829,000us-gaap_SalesRevenueGoodsNet $ 397,969,000us-gaap_SalesRevenueGoodsNet $ 378,924,000us-gaap_SalesRevenueGoodsNet          
Entity-Wide Revenue, Major Customer, Percentage     10.00%us-gaap_ConcentrationRiskPercentage1          
Ford Motor Company [Member]                
Segment Reporting Information [Line Items]                
Net sales 88,400,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_MajorCustomersAxis
= ldl_FordMotorCompanyMember
79,700,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_MajorCustomersAxis
= ldl_FordMotorCompanyMember
71,200,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_MajorCustomersAxis
= ldl_FordMotorCompanyMember
         
Entity-Wide Revenue, Major Customer, Percentage 16.50%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_MajorCustomersAxis
= ldl_FordMotorCompanyMember
20.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_MajorCustomersAxis
= ldl_FordMotorCompanyMember
18.80%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_MajorCustomersAxis
= ldl_FordMotorCompanyMember
         
Chrysler Group Llc [Member]                
Segment Reporting Information [Line Items]                
Net sales 43,500,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_MajorCustomersAxis
= ldl_ChryslerGroupsLlcMember
38,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_MajorCustomersAxis
= ldl_ChryslerGroupsLlcMember
           
Entity-Wide Revenue, Major Customer, Percentage   10.90%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_MajorCustomersAxis
= ldl_ChryslerGroupsLlcMember
10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_MajorCustomersAxis
= ldl_ChryslerGroupsLlcMember
         
Industrial Filtration Segment [Member]                
Segment Reporting Information [Line Items]                
Business Combination, Inventory Step-Up 2,100,000ldl_BusinessCombinationInventoryStepUp
/ us-gaap_StatementBusinessSegmentsAxis
= ldl_IndustrialFiltrationSegmentMember
             
Net sales 112,220,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= ldl_IndustrialFiltrationSegmentMember
0us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= ldl_IndustrialFiltrationSegmentMember
0us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= ldl_IndustrialFiltrationSegmentMember
         
Thermalacoustical Metals Segment [Member]                
Segment Reporting Information [Line Items]                
Commission Settlement Charge 2,900,000ldl_CommissionSettlementCharge
/ us-gaap_StatementBusinessSegmentsAxis
= ldl_ThermalacousticalMetalsSegmentMember
    2,000,000ldl_CommissionSettlementCharge
/ us-gaap_StatementBusinessSegmentsAxis
= ldl_ThermalacousticalMetalsSegmentMember
       
Performance Materials [Member]                
Segment Reporting Information [Line Items]                
Gain (Loss) on Sale of Business   800,000us-gaap_GainLossOnSaleOfBusiness
/ us-gaap_StatementBusinessSegmentsAxis
= ldl_PerformanceMaterialsMember
           
Asset impairment charges   300,000us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= ldl_PerformanceMaterialsMember
           
Corprates [Member]                
Segment Reporting Information [Line Items]                
Defined Benefit Plan, Non-Cash Plan Settlement Charge 4,900,000ldl_DefinedBenefitPlanNonCashPlanSettlementCharge
/ us-gaap_StatementBusinessSegmentsAxis
= ldl_CorporatesMember
             
Transaction related costs 2,600,000us-gaap_BusinessCombinationAcquisitionRelatedCosts
/ us-gaap_StatementBusinessSegmentsAxis
= ldl_CorporatesMember
1,200,000us-gaap_BusinessCombinationAcquisitionRelatedCosts
/ us-gaap_StatementBusinessSegmentsAxis
= ldl_CorporatesMember
           
Asset impairment charges   1,500,000us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= ldl_CorporatesMember
           
Vital Fluids [Member] | Subsequent Event [Member]                
Segment Reporting Information [Line Items]                
Proceeds from Divestiture of Businesses         29,900,000us-gaap_ProceedsFromDivestitureOfBusinesses
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= ldl_VitalFluidsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Maximum [Member] | Scenario, Forecast [Member] | Vital Fluids [Member]                
Segment Reporting Information [Line Items]                
Gain on disposal of business           12,000,000us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= ldl_VitalFluidsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
   
Minimum [Member] | Scenario, Forecast [Member] | Vital Fluids [Member]                
Segment Reporting Information [Line Items]                
Gain on disposal of business           10,000,000us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= ldl_VitalFluidsMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
   
Industrial Filtration [Member]                
Segment Reporting Information [Line Items]                
Transaction related costs             $ 2,200,000us-gaap_BusinessCombinationAcquisitionRelatedCosts
/ us-gaap_BusinessAcquisitionAxis
= ldl_IndustrialFiltrationMember
$ 700,000us-gaap_BusinessCombinationAcquisitionRelatedCosts
/ us-gaap_BusinessAcquisitionAxis
= ldl_IndustrialFiltrationMember