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Segment Reporting (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Revenue	$ 382,477us-gaap_SalesRevenueNet	$ 360,203us-gaap_SalesRevenueNet
Income from operations	72,803us-gaap_OperatingIncomeLoss	70,046us-gaap_OperatingIncomeLoss
CAG/LPD Segment Transition [Member]
Segment Reporting Information [Line Items]
Revenue		$ 2,900us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = idxx_CagLpdSegmentTransitionMember

X

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

+ Details

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X

- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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- Details

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