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Financial instruments Aggregate accounts receivable, net of allowance for doubtful accounts (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 29, 2015 | Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Current and long term accounts receivable, allowances | $ 2,300,000 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent |  | $ 2,400,000 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent |
Spain, Italy, Portugal, and Greece |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Current and long-term accounts receivable (net of allowances of $7.1 million and $8.1 million at March 29, 2015 and December 31, 2014, respectively) in Greece, Italy, Spain and Portugal (1) | 76,322,000 us-gaap_AccountsReceivableNet / us-gaap_StatementGeographicalAxis = tfx_ConcentrationCountriesGrItSpandPoMember | [1] | 76,190,000 us-gaap_AccountsReceivableNet / us-gaap_StatementGeographicalAxis = tfx_ConcentrationCountriesGrItSpandPoMember | [1]
Percentage of total net current and long-term accounts receivable | 26.60%tfx_EntityWideAccountsReceivableByCountryPercentage / us-gaap_StatementGeographicalAxis = tfx_ConcentrationCountriesGrItSpandPoMember |  | 27.30%tfx_EntityWideAccountsReceivableByCountryPercentage / us-gaap_StatementGeographicalAxis = tfx_ConcentrationCountriesGrItSpandPoMember |
Current and long term accounts receivable, allowances | 7,100,000 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent / us-gaap_StatementGeographicalAxis = tfx_ConcentrationCountriesGrItSpandPoMember |  | 8,100,000 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent / us-gaap_StatementGeographicalAxis = tfx_ConcentrationCountriesGrItSpandPoMember |
Long-term portion of accounts receivable, net | $ 10,300,000 us-gaap_AccountsReceivableNetNoncurrent / us-gaap_StatementGeographicalAxis = tfx_ConcentrationCountriesGrItSpandPoMember |  | $ 11,300,000 us-gaap_AccountsReceivableNetNoncurrent / us-gaap_StatementGeographicalAxis = tfx_ConcentrationCountriesGrItSpandPoMember |
[1] | The long-term portion of accounts receivable, net from customers in Greece, Italy, Spain and Portugal at March 29, 2015 and December 31, 2014 was $10.3 million and $11.3 million, respectively, and is reported on the condensed consolidated balance sheet in other assets

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