REVENUE (Disaggregation of Revenue by Major Product and Service Categories) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Total revenue	$ 964,095	$ 900,195
CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	889,285	827,279
Water segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	43,071	38,883
LPD segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	28,205	29,208
Other segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	3,534	4,825
CAG Diagnostics recurring revenue: | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	780,144	726,902
IDEXX VetLab consumables | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	316,929	291,114
Rapid assay products | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	86,315	82,032
Reference laboratory diagnostic and consulting services | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	344,338	323,180
CAG Diagnostics services and accessories | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	32,562	30,576
CAG Diagnostics capital - instruments | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	34,092	33,144
Veterinary software, services and diagnostic imaging systems: | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	75,049	67,233
Recurring revenue | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	59,700	51,707
Systems and hardware | CAG segment revenue
Disaggregation of Revenue [Line Items]
Total revenue	$ 15,349	$ 15,526