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Commitments and contingent liabilities - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended
	Dec. 05, 2014	Mar. 29, 2015	Dec. 31, 2014
Loss Contingencies [Line Items]
Estimated litigation liability		5,000,000us-gaap_LitigationReserve
Parish of Calcasieu | Judicial Ruling | Compensatory Damages
Loss Contingencies [Line Items]
Damages awarded	100,000us-gaap_LossContingencyDamagesAwardedValue / us-gaap_LitigationCaseAxis = tfx_ParishofCalcasieuMember / us-gaap_LitigationStatusAxis = us-gaap_JudicialRulingMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = tfx_CompensatoryDamagesMember
Parish of Calcasieu | Judicial Ruling | Punitive Damages
Loss Contingencies [Line Items]
Damages awarded	23,000,000us-gaap_LossContingencyDamagesAwardedValue / us-gaap_LitigationCaseAxis = tfx_ParishofCalcasieuMember / us-gaap_LitigationStatusAxis = us-gaap_JudicialRulingMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = tfx_PunitiveDamagesMember
Parish of Calcasieu | Judicial Ruling | Unfavorable Regulatory Action
Loss Contingencies [Line Items]
Possible loss			10,000,000us-gaap_LossContingencyRangeOfPossibleLossMaximum / us-gaap_LitigationCaseAxis = tfx_ParishofCalcasieuMember / us-gaap_LitigationStatusAxis = us-gaap_JudicialRulingMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_UnfavorableRegulatoryActionMember
Discontinued Operations
Loss Contingencies [Line Items]
Estimated litigation liability		1,500,000us-gaap_LitigationReserve / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Minimum
Loss Contingencies [Line Items]
Time-frame over which the accrued amounts may be paid out, in years		15 years
Maximum
Loss Contingencies [Line Items]
Time-frame over which the accrued amounts may be paid out, in years		20 years
Accrued Liabilities
Loss Contingencies [Line Items]
Waste disposed accrued liability		1,100,000us-gaap_AccrualForEnvironmentalLossContingencies / us-gaap_InformationByFinancialStatementLineItemAxis = us-gaap_AccruedLiabilitiesMember
Other Liability
Loss Contingencies [Line Items]
Waste disposed accrued liability		6,500,000us-gaap_AccrualForEnvironmentalLossContingencies / us-gaap_InformationByFinancialStatementLineItemAxis = tfx_OtherLiabilityMember

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 30

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