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Pension and other postretirement benefits - reconciliation of changes in level three pension assets measured at fair value on recurring basis (Detail) (Hedge Fund Of Funds, USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Hedge Fund Of Funds |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |
Balance at beginning of year | $ 51,654 tfx_DefinedBenefitPlanFairValueOfPlanAssetsLevelThree / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = tfx_HedgeFundOfFundsMember | $ 48,198 tfx_DefinedBenefitPlanFairValueOfPlanAssetsLevelThree / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = tfx_HedgeFundOfFundsMember
Unrealized gain on assets | 2,698 us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = tfx_HedgeFundOfFundsMember | 3,456 us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = tfx_HedgeFundOfFundsMember
Balance at end of year | $ 54,352 tfx_DefinedBenefitPlanFairValueOfPlanAssetsLevelThree / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = tfx_HedgeFundOfFundsMember | $ 51,654 tfx_DefinedBenefitPlanFairValueOfPlanAssetsLevelThree / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = tfx_HedgeFundOfFundsMember

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- Definition Defined benefit plan fair value of plan assets level 3. + References No definition available. + Details
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Namespace Prefix: | tfx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Actual Return on Plan Assets (Component of Net Periodic Postretirement Benefit Cost) -URI http://asc.fasb.org/extlink&oid=6504192 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Actual Return on Plan Assets (Component of Net Periodic Pension Cost) -URI http://asc.fasb.org/extlink&oid=6504226 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration