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Income Taxes (Schedule Of Components Of Net Deferred Tax Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Current [Member] |  |
Assets: |  |
Accrued expenses | $ 20,377 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember | $ 19,833 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember
Accounts receivable reserves | 2,591 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember | 1,153 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember
Deferred revenue | 8,697 us-gaap_DeferredTaxAssetsDeferredIncome / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember | 5,872 us-gaap_DeferredTaxAssetsDeferredIncome / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember
Inventory basis differences | 3,154 us-gaap_DeferredTaxAssetsInventory / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember | 2,670 us-gaap_DeferredTaxAssetsInventory / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember
Share-based compensation | 2,490 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember | 2,325 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember
Other | 171 us-gaap_DeferredTaxAssetsTaxDeferredExpenseOther / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember | 13 us-gaap_DeferredTaxAssetsTaxDeferredExpenseOther / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember
Net operating loss carryforwards | 65 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember | 500 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember
Unrealized losses on foreign currency exchange contracts, interest rate swaps and investments |  | 1,580 us-gaap_DeferredTaxAssetsOtherComprehensiveLoss / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember
Total assets | 37,545 us-gaap_DeferredTaxAssetsGross / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember | 33,946 us-gaap_DeferredTaxAssetsGross / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember
Valuation allowance | (457)us-gaap_DeferredTaxAssetsValuationAllowance / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember | (642)us-gaap_DeferredTaxAssetsValuationAllowance / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember
Total assets, net of valuation allowance | 37,088 us-gaap_DeferredTaxAssetsNet / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember | 33,304 us-gaap_DeferredTaxAssetsNet / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember
Liabilities: |  |
Other | (610)us-gaap_DeferredTaxLiabilitiesOther / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember | (190)us-gaap_DeferredTaxLiabilitiesOther / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember
Unrealized gains on foreign currency exchange | (2,603)us-gaap_DeferredTaxLiabilitiesUnrealizedCurrencyTransactionGains / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember | (1,303)us-gaap_DeferredTaxLiabilitiesUnrealizedCurrencyTransactionGains / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember
Total liabilities | (3,213)us-gaap_DeferredTaxLiabilities / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember | (1,493)us-gaap_DeferredTaxLiabilities / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember
Net deferred tax assets (liabilities) | 33,875 us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember | 31,811 us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_CurrentMember
Long-Term [Member] |  |
Assets: |  |
Accrued expenses | 7,824 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember | 1,622 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember
Deferred revenue | 3,084 us-gaap_DeferredTaxAssetsDeferredIncome / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember | 1,552 us-gaap_DeferredTaxAssetsDeferredIncome / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember
Inventory basis differences | 347 us-gaap_DeferredTaxAssetsInventory / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember |
Property-based differences | 1,601 us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember | 1,728 us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember
Share-based compensation | 8,936 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember | 7,923 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember
Other | 255 us-gaap_DeferredTaxAssetsTaxDeferredExpenseOther / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember | 150 us-gaap_DeferredTaxAssetsTaxDeferredExpenseOther / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember
Net operating loss carryforwards | 4,368 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember | 4,182 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember
Total assets | 26,415 us-gaap_DeferredTaxAssetsGross / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember | 17,157 us-gaap_DeferredTaxAssetsGross / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember
Valuation allowance | (4,221)us-gaap_DeferredTaxAssetsValuationAllowance / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember | (4,559)us-gaap_DeferredTaxAssetsValuationAllowance / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember
Total assets, net of valuation allowance | 22,194 us-gaap_DeferredTaxAssetsNet / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember | 12,598 us-gaap_DeferredTaxAssetsNet / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember
Liabilities: |  |
Deferred instrument costs | (10,149)us-gaap_DeferredTaxLiabilitiesOtherFiniteLivedAssets / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember | (3,093)us-gaap_DeferredTaxLiabilitiesOtherFiniteLivedAssets / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember
Property-based differences | (33,978)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember | (25,823)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember
Intangible assst basis differences | (16,882)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember | (15,513)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember
Other | (517)us-gaap_DeferredTaxLiabilitiesOther / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember | (790)us-gaap_DeferredTaxLiabilitiesOther / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember
Total liabilities | (61,526)us-gaap_DeferredTaxLiabilities / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember | (45,219)us-gaap_DeferredTaxLiabilities / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember
Net deferred tax assets (liabilities) | $ (39,332)us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember | $ (32,621)us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent / idxx_ComponentsOfNetDeferredTaxAssetsAndLiabilitiesAxis = idxx_LongTermMember

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from deferred income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences expected to be realized or consumed within one year or operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e31917-109318 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e31931-109318 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from other provisions, reserves, allowances, and accruals not separately disclosed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Deferred Tax Asset -URI http://asc.fasb.org/extlink&oid=6510090 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from the allowance for doubtful accounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences not separately disclosed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from long-lived assets other than property, plant, and equipment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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