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Revenue Recognition (Disaggregation of Revenue by Major Product and Service Categories) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Disaggregation of Revenue [Line Items] |  |
Total revenue | $ 626,336 | $ 576,056
CAG segment revenue |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 551,996 | 508,918
Water segment revenue |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 34,149 | 30,310
LPD segment revenue |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 34,154 | 31,506
Other segment revenue |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 6,037 | 5,322
Cag Diagnostics recurring revenue | CAG segment revenue |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 487,925 | 443,791
IDEXX VetLab consumables | CAG segment revenue |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 188,713 | 167,211
Rapid assay products | CAG segment revenue |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 57,430 | 54,431
Reference laboratory diagnostic and consulting services | CAG segment revenue |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 220,261 | 202,658
CAG Diagnostics services and accessories | CAG segment revenue |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 21,521 | 19,491
CAG Diagnostics capital - instruments | CAG segment revenue |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 23,833 | 28,749
Veterinary software, services and diagnostic imaging systems | CAG segment revenue |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | $ 40,238 | $ 36,378

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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