REVENUE (Disaggregation of Revenue by Major Product and Service Categories) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,109,457	$ 1,003,578	$ 2,107,884	$ 1,967,673
Segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	1,105,206	999,330	2,098,959	1,959,891
Segment revenue | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	1,022,443	922,298	1,942,279	1,811,583
Segment revenue | Water segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	51,001	46,726	96,322	89,797
Segment revenue | LPD segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	31,762	30,306	60,358	58,511
Segment revenue | CAG Diagnostics recurring revenue: | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	877,995	808,454	1,684,262	1,588,598
Segment revenue | IDEXX VetLab consumables | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	375,112	325,348	719,891	642,277
Segment revenue | Rapid assay products | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	100,240	103,290	184,274	189,605
Segment revenue | Reference laboratory diagnostic and consulting services | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	367,694	347,373	712,100	691,711
Segment revenue | CAG Diagnostics services and accessories | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	34,949	32,443	67,997	65,005
Segment revenue | CAG Diagnostics capital - instruments | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	58,600	35,292	90,594	69,384
Segment revenue | Veterinary software, services and diagnostic imaging systems: | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	85,848	78,552	167,423	153,601
Segment revenue | Recurring revenue | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	68,954	63,117	134,747	122,817
Segment revenue | Systems and hardware | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	16,894	15,435	32,676	30,784
Other segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	$ 4,251	$ 4,248	$ 8,925	$ 7,782