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Income Taxes (Additional Information) (Detail) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Taxes [Line Items]      
Effective tax rate for income from continuing operations 35.10%us-gaap_EffectiveIncomeTaxRateContinuingOperations 32.40%us-gaap_EffectiveIncomeTaxRateContinuingOperations 19.90%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount $ 1,200,000us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential    
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount 900,000us-gaap_IncomeTaxReconciliationDeductionsQualifiedProductionActivities    
Valuation Allowance, Deferred Tax Asset, Change in Amount 200,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount 600,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount 500,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Valuation allowance 3,727,000us-gaap_DeferredTaxAssetsValuationAllowance 3,315,000us-gaap_DeferredTaxAssetsValuationAllowance  
Tax Credit Carry forward Reversal Of Valuation Allowance   1,100,000ldl_TaxCreditCarryforwardReversalOfValuationAllowance 3,900,000ldl_TaxCreditCarryforwardReversalOfValuationAllowance
Income Tax Reconciliation Domestic Production Activities   800,000ldl_IncomeTaxReconciliationDomesticProductionActivities  
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount   500,000us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate  
Deferred Tax Assets, Operating Loss Carryforwards, State and Local 10,100,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal    
Unpaid income taxes on undistributed earnings of international subsidiaries 25,100,000us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries    
Reasonably expected net unrecognized benefits may be recognized 400,000us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit    
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 1,300,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate    
State and Local Jurisdiction [Member]      
Income Taxes [Line Items]      
Tax Credit Carry forward Reversal Of Valuation Allowance 500,000ldl_TaxCreditCarryforwardReversalOfValuationAllowance
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember		    
Income Tax Reconciliation State And Local Income Taxes Expected To Offset In Current Year   300,000ldl_IncomeTaxReconciliationStateAndLocalIncomeTaxesExpectedToOffsetInCurrentYear
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember		  
Tax credit carryforward, amount 2,900,000us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember		    
Operating Loss Carryforwards, Valuation Allowance 9,600,000us-gaap_OperatingLossCarryforwardsValuationAllowance
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember		    
Tax Credit Carryforward, Valuation Allowance 1,100,000us-gaap_TaxCreditCarryforwardValuationAllowance
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember		    
Foreign Tax Authority [Member]      
Income Taxes [Line Items]      
Tax Credit Carry forward Reversal Of Valuation Allowance 400,000ldl_TaxCreditCarryforwardReversalOfValuationAllowance
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember		    
Future Benefits [Member]      
Income Taxes [Line Items]      
Income Tax Reconciliation State And Local Income Taxes Expected To Benefit Future Periods   800,000ldl_IncomeTaxReconciliationStateAndLocalIncomeTaxesExpectedToBenefitFuturePeriods
/ us-gaap_IncomeTaxAuthorityAxis
= ldl_FutureBenefitsMember		  
Netherlands and China [Member]      
Income Taxes [Line Items]      
Valuation allowance 1,100,000us-gaap_DeferredTaxAssetsValuationAllowance
/ us-gaap_StatementGeographicalAxis
= ldl_NetherlandsandChinaMember		    
France [Member]      
Income Taxes [Line Items]      
Valuation Reserve Against Net Operating Loss Carry forwards 2,100,000ldl_ValuationReserveAgainstNetOperatingLossCarryforwards
/ us-gaap_StatementGeographicalAxis
= country_FR		    
UNITED KINGDOM      
Income Taxes [Line Items]      
Valuation Reserve Against Net Operating Loss Carry forwards 800,000ldl_ValuationReserveAgainstNetOperatingLossCarryforwards
/ us-gaap_StatementGeographicalAxis
= country_GB		    
NETHERLANDS [Member]      
Income Taxes [Line Items]      
Valuation Allowance, Deferred Tax Asset, Change in Amount     700,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
/ us-gaap_StatementGeographicalAxis
= country_NL
Valuation Reserve Against Net Operating Loss Carry forwards 9,400,000ldl_ValuationReserveAgainstNetOperatingLossCarryforwards
/ us-gaap_StatementGeographicalAxis
= country_NL		    
CHINA      
Income Taxes [Line Items]      
Valuation Reserve Against Net Operating Loss Carry forwards 5,000,000ldl_ValuationReserveAgainstNetOperatingLossCarryforwards
/ us-gaap_StatementGeographicalAxis
= country_CN		    
Industrial Filtration [Member]      
Income Taxes [Line Items]      
Nondeductible acquisition transaction costs 800,000ldl_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAcquisitionTransactionCosts
/ us-gaap_StatementBusinessSegmentsAxis
= ldl_IndustrialFiltrationMember		    
Minimum [Member]      
Income Taxes [Line Items]      
Tax payable on undistributed earnings 1,000,000us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		    
Maximum [Member]      
Income Taxes [Line Items]      
Tax payable on undistributed earnings $ 8,500,000.0us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings
/ us-gaap_RangeAxis
= us-gaap_MaximumMember