REVENUE (Disaggregation of Revenue by Major Product and Service Categories) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,140,820	$ 998,427
Segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	1,136,800	993,753
Segment revenue \| CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	1,054,052	919,836
Segment revenue \| Water segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	50,265	45,321
Segment revenue \| LPD segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	32,483	28,596
Segment revenue \| Total CAG Diagnostics recurring revenue \| CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	920,313	806,267
Segment revenue \| IDEXX VetLab consumables \| CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	412,582	344,779
Segment revenue \| Rapid assay products \| CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	84,938	84,034
Segment revenue \| Reference laboratory diagnostic and consulting services \| CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	386,179	344,406
Segment revenue \| CAG Diagnostics services and accessories \| CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	36,614	33,048
Segment revenue \| CAG Diagnostics capital - instruments \| CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	42,449	31,994
Segment revenue \| Total veterinary software, services and diagnostic imaging systems \| CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	91,290	81,575
Segment revenue \| Recurring revenue \| CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	73,536	65,793
Segment revenue \| Systems and hardware \| CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	17,754	15,782
Other revenue
Disaggregation of Revenue [Line Items]
Total revenue	$ 4,020	$ 4,674