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Pension and other postretirement benefits - fair values of pension plan assets footnote (Detail)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Schedule Of Pension Plan Assets By Fair Value [Line Items]    
Maximum percentage of net assets invested in emerging market 30.00%tfx_MaximumPercentageOfNetAssetsInvestedInEmergingMarket  
Equity Hedge Based Funds    
Schedule Of Pension Plan Assets By Fair Value [Line Items]    
Percentage of net assets invested in funds 33.00%tfx_PercentageOfNetAssetsInvestedInFunds
/ us-gaap_InvestmentTypeAxis
= tfx_EquityHedgeBasedFundsMember		 28.00%tfx_PercentageOfNetAssetsInvestedInFunds
/ us-gaap_InvestmentTypeAxis
= tfx_EquityHedgeBasedFundsMember
Tactical Directional Based Funds    
Schedule Of Pension Plan Assets By Fair Value [Line Items]    
Percentage of net assets invested in funds 10.00%tfx_PercentageOfNetAssetsInvestedInFunds
/ us-gaap_InvestmentTypeAxis
= tfx_TacticalDirectionalBasedFundsMember		 18.00%tfx_PercentageOfNetAssetsInvestedInFunds
/ us-gaap_InvestmentTypeAxis
= tfx_TacticalDirectionalBasedFundsMember
Relative Value Based Funds    
Schedule Of Pension Plan Assets By Fair Value [Line Items]    
Percentage of net assets invested in funds 24.00%tfx_PercentageOfNetAssetsInvestedInFunds
/ us-gaap_InvestmentTypeAxis
= tfx_RelativeValueBasedFundsMember		 25.00%tfx_PercentageOfNetAssetsInvestedInFunds
/ us-gaap_InvestmentTypeAxis
= tfx_RelativeValueBasedFundsMember
Event Driven Strategy    
Schedule Of Pension Plan Assets By Fair Value [Line Items]    
Percentage of net assets invested in funds 33.00%tfx_PercentageOfNetAssetsInvestedInFunds
/ us-gaap_InvestmentTypeAxis
= tfx_EventDrivenStrategyMember		 23.00%tfx_PercentageOfNetAssetsInvestedInFunds
/ us-gaap_InvestmentTypeAxis
= tfx_EventDrivenStrategyMember
Foreign Companies    
Schedule Of Pension Plan Assets By Fair Value [Line Items]    
Percentage of net assets invested in foreign equity securities 80.00%tfx_PercentageOfNetAssetsInvestedInForeignEquitySecurities
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= tfx_ForeignCompaniesMember		  
High Yield Fixed Income    
Schedule Of Pension Plan Assets By Fair Value [Line Items]    
Percentage of net assets invested 80.00%tfx_PercentageOfNetAssetsInvested
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= tfx_HighYieldFixedIncomeMember		  
Fixed Income Securities    
Schedule Of Pension Plan Assets By Fair Value [Line Items]    
Percentage of net assets invested 80.00%tfx_PercentageOfNetAssetsInvested
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_FixedIncomeSecuritiesMember		  
Cash    
Schedule Of Pension Plan Assets By Fair Value [Line Items]    
Percentage of net assets invested in funds   6.00%tfx_PercentageOfNetAssetsInvestedInFunds
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CashMember
U.S. Russell 2500 Index | Small and Mid-Sized Companies | Equity Securities    
Schedule Of Pension Plan Assets By Fair Value [Line Items]    
Percentage of net assets invested 80.00%tfx_PercentageOfNetAssetsInvested
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= tfx_SmallAndMidSizedCompaniesMember
/ us-gaap_FinancialInstrumentAxis
= tfx_UnitedStatesRussellTwoFiveZeroZeroIndexMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember