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Fair value measurement - reconciliation of changes in three financial liabilities measured at fair value on recurring (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
Changes in Level 3 Financial Liabilities Related to Contingent Consideration [Roll Forward] |  |
Beginning balance | $ 20,829 | $ 33,433
Payment | (7,282) | (8,054)
Revaluations | (6,445) | (4,550)
Ending balance | $ 7,102 | $ 20,829

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- Definition Payment for contingent consideration. + References No definition available. + Details
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Namespace Prefix: | tfx_
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Balance Type: | debit
Period Type: | duration

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- Definition Revaluation of contingent consideration. + References No definition available. + Details
Name: | tfx_RevaluationOfContingentConsideration
Namespace Prefix: | tfx_
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=66048111&loc=d3e19207-110258 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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