REVENUE (Disaggregation of Revenue by Major Product and Service Categories) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Total revenue	$ 998,427	$ 964,095
Segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	993,753	960,561
Segment revenue | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	919,836	889,285
Segment revenue | Water segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	45,321	43,071
Segment revenue | LPD segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	28,596	28,205
Segment revenue | CAG Diagnostics recurring revenue: | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	806,267	780,144
Segment revenue | IDEXX VetLab consumables | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	344,779	316,929
Segment revenue | Rapid assay products | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	84,034	86,315
Segment revenue | Reference laboratory diagnostic and consulting services | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	344,406	344,338
Segment revenue | CAG Diagnostics services and accessories | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	33,048	32,562
Segment revenue | CAG Diagnostics capital - instruments | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	31,994	34,092
Segment revenue | Veterinary software, services and diagnostic imaging systems: | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	81,575	75,049
Segment revenue | Recurring revenue | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	65,793	59,700
Segment revenue | Systems and hardware | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	15,782	15,349
Other segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	$ 4,674	$ 3,534