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Accumulated Other Comprehensive Income (Schedule of Reclassifications out of Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Provision for income taxes | $ 20,346 us-gaap_IncomeTaxExpenseBenefit | $ 21,150 us-gaap_IncomeTaxExpenseBenefit
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 2,964 us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax |
Reclassifications out of Accumulated Other Comprehensive Income [Member] |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | 4,217 us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax / us-gaap_IncomeStatementLocationAxis = idxx_ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeMember | 196 us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax / us-gaap_IncomeStatementLocationAxis = idxx_ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeMember
Provision for income taxes | 1,253 us-gaap_IncomeTaxExpenseBenefit / us-gaap_IncomeStatementLocationAxis = idxx_ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeMember | 47 us-gaap_IncomeTaxExpenseBenefit / us-gaap_IncomeStatementLocationAxis = idxx_ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeMember
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 2,964 us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax / us-gaap_IncomeStatementLocationAxis = idxx_ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeMember | 149 us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax / us-gaap_IncomeStatementLocationAxis = idxx_ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeMember
Foreign Currency Exchange Contracts [Member] | Reclassifications out of Accumulated Other Comprehensive Income [Member] |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | 4,479 us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax / us-gaap_IncomeStatementLocationAxis = idxx_ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeMember / us-gaap_OtherComprehensiveIncomeLocationAxis = idxx_ForeignCurrencyExchangeContractsMember | 458 us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax / us-gaap_IncomeStatementLocationAxis = idxx_ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeMember / us-gaap_OtherComprehensiveIncomeLocationAxis = idxx_ForeignCurrencyExchangeContractsMember
Interest Rate Swaps [Member] | Reclassifications out of Accumulated Other Comprehensive Income [Member] |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | $ (262)us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax / us-gaap_IncomeStatementLocationAxis = idxx_ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeMember / us-gaap_OtherComprehensiveIncomeLocationAxis = idxx_InterestRateSwapsMember | $ (262)us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax / us-gaap_IncomeStatementLocationAxis = idxx_ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeMember / us-gaap_OtherComprehensiveIncomeLocationAxis = idxx_InterestRateSwapsMember

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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition Amount before tax of reclassification adjustments of other comprehensive income (loss). + References No definition available. + Details
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- Definition Amount after tax of reclassification adjustments of other comprehensive income (loss). + References No definition available. + Details
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