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Commitments and contingent liabilities - Additional Information (Detail) (USD $) | 12 Months Ended | 0 Months Ended |
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 05, 2014 | Aug. 31, 2013
Loss Contingencies [Line Items] |  |  |  |  |
Operating leases, rental expense | $ 29,400,000 us-gaap_OperatingLeasesRentExpenseNet | $ 26,400,000 us-gaap_OperatingLeasesRentExpenseNet | $ 24,000,000 us-gaap_OperatingLeasesRentExpenseNet |  |
Estimated fair value of the costs to construct buildings | 51,834,000 us-gaap_ConstructionInProgressGross | 55,092,000 us-gaap_ConstructionInProgressGross |  |  |
Discontinued Operations |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Contingency reserve for litigation | 2,400,000 us-gaap_LitigationReserve / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 1,400,000 us-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 | P15Y |  |  |  |
Maximum |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Time-frame over which the accrued amounts may be paid out, in years | P20Y |  |  |  |
Accrued Liabilities |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Waste disposed accrued liability | 1,300,000 us-gaap_AccrualForEnvironmentalLossContingencies / us-gaap_BalanceSheetLocationAxis = us-gaap_AccruedLiabilitiesMember | 2,500,000 us-gaap_AccrualForEnvironmentalLossContingencies / us-gaap_BalanceSheetLocationAxis = us-gaap_AccruedLiabilitiesMember |  |  |
Contingency reserve for litigation | 6,000,000 us-gaap_LitigationReserve / us-gaap_BalanceSheetLocationAxis = us-gaap_AccruedLiabilitiesMember | 6,800,000 us-gaap_LitigationReserve / us-gaap_BalanceSheetLocationAxis = us-gaap_AccruedLiabilitiesMember |  |  |
Other Liability |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Waste disposed accrued liability | 6,500,000 us-gaap_AccrualForEnvironmentalLossContingencies / us-gaap_BalanceSheetLocationAxis = tfx_OtherLiabilityMember | 5,800,000 us-gaap_AccrualForEnvironmentalLossContingencies / us-gaap_BalanceSheetLocationAxis = tfx_OtherLiabilityMember |  |  |
Property, Plant and Equipment | Build To Suit Lease |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Estimated fair value of the costs to construct buildings |  |  |  |  | 28,300,000 us-gaap_ConstructionInProgressGross / us-gaap_FairValueByAssetClassAxis = us-gaap_PropertyPlantAndEquipmentMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = tfx_BuildToSuitLeaseMember
Parish of Calcasieu | Judicial Ruling | Compensatory Damages |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Damages awarded to plaintiff |  |  |  | 125,000 us-gaap_LossContingencyDamagesAwardedValue / us-gaap_LitigationCaseAxis = tfx_ParishofCalcasieuMember / us-gaap_LitigationStatusAxis = tfx_JudicialRulingMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = tfx_CompensatoryDamagesMember |
Parish of Calcasieu | Judicial Ruling | Punitive Damages |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Damages awarded to plaintiff |  |  |  | 23,000,000 us-gaap_LossContingencyDamagesAwardedValue / us-gaap_LitigationCaseAxis = tfx_ParishofCalcasieuMember / us-gaap_LitigationStatusAxis = tfx_JudicialRulingMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = tfx_PunitiveDamagesMember |
Parish of Calcasieu | Judicial Ruling | Unfavorable Regulatory Action |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Loss Contingency, Range of Possible Loss, Maximum | $ 10,000,000 us-gaap_LossContingencyRangeOfPossibleLossMaximum / us-gaap_LitigationCaseAxis = tfx_ParishofCalcasieuMember / us-gaap_LitigationStatusAxis = tfx_JudicialRulingMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_UnfavorableRegulatoryActionMember |  |  |  |

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- Definition Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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