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ACQUISITIONS, ASSET PURCHASES AND INVESTMENTS (Details) $ in Thousands |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Feb. 01, 2024 USD ($) | Mar. 31, 2023 USD ($) | Sep. 30, 2022 USD ($) | Dec. 31, 2021 USD ($) | Sep. 30, 2021 USD ($) | Jun. 30, 2021 USD ($) | Mar. 31, 2021 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) arrangement | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Investment acquired, non-controlling interest share |  |  |  |  |  |  |  | $ 0 | $ 25,000 | $ 0 |
Goodwill |  |  |  | $ 359,345 |  |  |  | $ 365,961 | 361,795 | 359,345 | $ 243,347
Noncontrolling interest, remaining percentage purchased from noncontrolling owners (percent) |  |  |  | 5.00% |  |  |  |  |  |  |
Acquisition of noncontrolling interest |  |  |  | $ 1,000 |  |  |  |  | $ 0 | 990 |
Noncompete agreements | Maximum |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible asset, useful life |  |  |  |  |  |  |  | 5 years |  |  |
International Water Testing Company | Canada |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payments to acquire business |  |  | $ 12,800 |  |  |  |  |  |  |  |
Goodwill |  |  | $ 6,900 |  |  |  |  |  |  |  |
International Water Testing Company | Canada | Technology-based intangible assets |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible asset, useful life |  |  | 10 years |  |  |  |  |  |  |  |
Net tangible assets |  |  | $ 3,400 |  |  |  |  |  |  |  |
International Water Testing Company | Canada | Customer relationships |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible asset, useful life |  |  | 10 years |  |  |  |  |  |  |  |
Net tangible assets |  |  | $ 1,200 |  |  |  |  |  |  |  |
International Water Testing Company | Canada | New tangible assets |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net tangible assets |  |  | 1,300 |  |  |  |  |  |  |  |
Reference Laboratory | Finland |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payments to acquire business |  |  |  | 13,400 |  |  |  |  |  |  |
Holdback |  |  | $ 1,300 | 1,400 |  |  |  |  |  | 1,400 |
Goodwill |  |  |  | 6,900 |  |  |  |  |  | 6,900 |
Liabilities |  |  |  | $ 1,700 |  |  |  |  |  | $ 1,700 |
Reference Laboratory | Finland | Customer relationships |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible asset, useful life |  |  |  | 10 years |  |  |  |  |  | 10 years |
Net tangible assets |  |  |  | $ 7,400 |  |  |  |  |  | $ 7,400 |
Reference Laboratory | Finland | Noncompete agreements |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible asset, useful life |  |  |  | 3 years |  |  |  |  |  | 3 years |
Net tangible assets |  |  |  | $ 800 |  |  |  |  |  | $ 800 |
Reference Laboratory | Switzerland |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  | $ 1,800 |  |  |  |
Liabilities |  |  |  |  |  |  | 600 |  |  |  |
Consideration transferred |  |  |  |  |  |  | 5,500 |  |  |  |
Contingent payment and holdback |  |  |  |  |  |  | $ 1,100 |  |  |  |
Reference Laboratory | Switzerland | Customer relationships |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible asset, useful life |  |  |  |  |  |  | 9 years |  |  |  |
Intangible assets acquired |  |  |  |  |  |  | $ 4,300 |  |  |  |
Teleradiology Business |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  | $ 3,700 |  |  |  |  |  |
Consideration transferred |  |  |  |  | 5,400 |  |  |  |  |  |
Contingent consideration |  |  |  |  | 300 |  |  |  |  |  |
Teleradiology Business | Customer relationships |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net tangible assets |  |  |  |  | $ 1,700 |  |  |  |  |  |
Weighted average useful life of intangible assets |  |  |  |  | 10 years |  |  |  |  |  |
EzyVet Cloud-based Veterinary |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net tangible assets |  |  |  |  |  | $ 3,200 |  |  |  |  |
Goodwill |  |  |  |  |  | 109,400 |  |  |  |  |
Consideration transferred |  |  |  |  |  | 157,200 |  |  |  |  |
Contingent consideration |  |  |  | 7,000 |  | 5,000 |  |  |  | $ 7,000 |
Change in amount of contingent payable |  |  |  | 2,000 |  |  |  |  |  |  |
Acquisition expenses |  |  |  | $ 2,200 |  |  |  |  |  |  |
EzyVet Cloud-based Veterinary | IDEXX VetLab consumables |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | 23,400 |  |  |  |  |
EzyVet Cloud-based Veterinary | Reference laboratory diagnostic and consulting services |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | 27,000 |  |  |  |  |
EzyVet Cloud-based Veterinary | Rapid assay products |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | 11,100 |  |  |  |  |
EzyVet Cloud-based Veterinary | Veterinary software, services and diagnostic imaging systems: |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | 47,900 |  |  |  |  |
EzyVet Cloud-based Veterinary | Technology-based intangible assets |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net tangible assets |  |  |  |  |  | $ 8,400 |  |  |  |  |
Weighted average useful life of intangible assets |  |  |  |  |  | 6 years |  |  |  |  |
EzyVet Cloud-based Veterinary | Customer relationships |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net tangible assets |  |  |  |  |  | $ 32,000 |  |  |  |  |
Weighted average useful life of intangible assets |  |  |  |  |  | 10 years |  |  |  |  |
EzyVet Cloud-based Veterinary | Noncompete agreements |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net tangible assets |  |  |  |  |  | $ 1,800 |  |  |  |  |
Weighted average useful life of intangible assets |  |  |  |  |  | 5 years |  |  |  |  |
EzyVet Cloud-based Veterinary | Trademarks |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net tangible assets |  |  |  |  |  | $ 2,400 |  |  |  |  |
Weighted average useful life of intangible assets |  |  |  |  |  | 14 years |  |  |  |  |
License Intellectual Property Rights |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of arrangements related to license intellectual property | arrangement |  |  |  |  |  |  |  |  | 2 |  |
Payments to acquire productive assets |  | $ 15,000 |  |  |  |  |  |  | $ 65,000 |  |
Payable to acquire productive assets |  |  |  |  |  |  |  |  | 15,000 |  |
Perpetual Intellectual Property License |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payments to acquire productive assets |  |  |  |  |  |  |  |  | $ 10,000 |  |
Finite-lived intangible asset, useful life |  |  |  |  |  |  |  |  | 10 years |  |
Assets Of A Privately Owned Software And Data Platform Business | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consideration transferred | $ 77,000 |  |  |  |  |  |  |  |  |  |
Contingent payment period | 3 years |  |  |  |  |  |  |  |  |  |
Assets Of A Privately Owned Software And Data Platform Business | Subsequent Event | Maximum |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Contingent payments | $ 30,000 |  |  |  |  |  |  |  |  |  |

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