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Fair value measurement - Additional Information (Detail) (USD $) | 12 Months Ended |
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Fair Value Measurements [Line Items] |  |  |
Reversal of contingent consideration | $ 8,200,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 | $ 12,300,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 |
Contingent consideration | 33,433,000 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue | 20,313,000 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue | 51,196,000 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
Current portion of contingent consideration | 11,276,000 tfx_CurrentPortionOfContingentConsideration | 4,131,000 tfx_CurrentPortionOfContingentConsideration |
Other liabilities | 22,100,000 tfx_FairValueMeasurementWithUnobservableInputsReconciliationContingentLiabilityInAcquisitionNoncurrent |  |
Minimum |  |  |
Fair Value Measurements [Line Items] |  |  |
Fair value of contingent consideration liability associated with future milestone | 15,000,000 tfx_EstimatedFairValueOfContingentConsiderationInEventCompanyAchievesSpecifiedMilestones / us-gaap_RangeAxis = us-gaap_MinimumMember |  |
Maximum |  |  |
Fair Value Measurements [Line Items] |  |  |
Fair value of contingent consideration liability associated with future milestone | $ 83,000,000 tfx_EstimatedFairValueOfContingentConsiderationInEventCompanyAchievesSpecifiedMilestones / us-gaap_RangeAxis = us-gaap_MaximumMember |  |

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- Definition Current portion of contingent consideration. + References No definition available. + Details
Name: | tfx_CurrentPortionOfContingentConsideration
Namespace Prefix: | tfx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Estimated fair value of contingent consideration in event company achieves specified milestones. + References No definition available. + Details
Name: | tfx_EstimatedFairValueOfContingentConsiderationInEventCompanyAchievesSpecifiedMilestones
Namespace Prefix: | tfx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | tfx_FairValueMeasurementsLineItems
Namespace Prefix: | tfx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Fair value measurement with unobservable inputs reconciliation contingent liability in acquisition noncurrent. + References No definition available. + Details
Name: | tfx_FairValueMeasurementWithUnobservableInputsReconciliationContingentLiabilityInAcquisitionNoncurrent
Namespace Prefix: | tfx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e7008-128479 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |