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Income taxes - reconciliations between statutory federal income tax rate and effective income tax rate (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Federal statutory rate	35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Percent	0.00%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses	0.00%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses	(60.84%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses
Tax effect of International items	(22.54%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	(14.83%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	11.28%us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
State taxes, net of federal benefit	2.10%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	(0.32%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	(0.90%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Uncertain tax contingencies	(0.83%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies	(4.06%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies	4.85%us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies
Contingent consideration reversals	(1.18%)tfx_EffectiveIncomeTaxRateReconciliationContingentConsiderationReversals	(2.04%)tfx_EffectiveIncomeTaxRateReconciliationContingentConsiderationReversals	0.00%tfx_EffectiveIncomeTaxRateReconciliationContingentConsiderationReversals
Other, net	0.47%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments	(0.35%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.68%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effective income tax rate, total	13.02%us-gaap_EffectiveIncomeTaxRateContinuingOperations	13.40%us-gaap_EffectiveIncomeTaxRateContinuingOperations	(9.93%)us-gaap_EffectiveIncomeTaxRateContinuingOperations

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Effective income tax rate reconciliation contingent consideration reversals.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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