Segment Reporting (Schedule of Segment Performance) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Revenue	$ 943,630		$ 860,546		$ 1,843,825	$ 1,697,095
Income from operations	296,144		179,066		576,543	427,410
Interest expense, net	(10,215)		(7,983)		(22,926)	(14,836)
Income before provision for income taxes	285,929		171,083		553,617	412,574
Provision for income taxes	61,693		39,104		115,327	86,630
Net income attributable to IDEXX Laboratories, Inc. stockholders	224,236	$ 214,054	131,979	$ 193,965	438,290	325,944
CAG
Segment Reporting Information [Line Items]
Revenue	866,652		784,087		1,693,931	1,545,271
Income from operations	275,509		156,526		537,259	379,651
Water
Segment Reporting Information [Line Items]
Revenue	43,029		39,195		81,912	75,566
Income from operations	19,820		17,920		36,791	34,574
LPD
Segment Reporting Information [Line Items]
Revenue	29,911		29,889		59,119	60,759
Income from operations	1,951		3,230		3,259	9,967
Other
Segment Reporting Information [Line Items]
Revenue	4,038		7,375		8,863	15,499
Income from operations	$ (1,136)		$ 1,390		$ (766)	$ 3,218