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Segment Reporting - Summary of Segment Performance (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Segment Reporting Information [Line Items] |  |
Revenue | $ 626,336 | $ 576,056
Income (loss) from operations | 144,325 | 133,138
Interest expense, net | (7,552) | (8,346)
Income before provision for income taxes | 136,773 | 124,792
Provision for income taxes | 24,917 | 22,083
Net income | 111,856 | 102,709
Less: Net income (loss) attributable to noncontrolling interest | 29 | 28
Net income attributable to IDEXX Laboratories, Inc. stockholders | 111,827 | 102,681
CAG |  |
Segment Reporting Information [Line Items] |  |
Revenue | 551,996 | 508,918
Water |  |
Segment Reporting Information [Line Items] |  |
Revenue | 34,149 | 30,310
LPD |  |
Segment Reporting Information [Line Items] |  |
Revenue | 34,154 | 31,506
Other |  |
Segment Reporting Information [Line Items] |  |
Revenue | 6,037 | 5,322
Operating Segments | CAG |  |
Segment Reporting Information [Line Items] |  |
Revenue | 551,996 | 508,918
Income (loss) from operations | 118,659 | 111,719
Operating Segments | Water |  |
Segment Reporting Information [Line Items] |  |
Revenue | 34,149 | 30,310
Income (loss) from operations | 15,882 | 13,815
Operating Segments | LPD |  |
Segment Reporting Information [Line Items] |  |
Revenue | 34,154 | 31,506
Income (loss) from operations | 9,663 | 6,289
Operating Segments | Other |  |
Segment Reporting Information [Line Items] |  |
Revenue | 6,037 | 5,322
Income (loss) from operations | $ 121 | $ 1,315

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