Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue:
Total revenue	$ 545,448	$ 491,976	$ 1,663,856	$ 1,462,937
Cost of Revenue:
Cost of service revenue	239,805	217,974	722,675	638,029
Gross profit	305,643	274,002	941,181	824,908
Expenses:
Sales and marketing	95,146	88,818	291,502	263,755
General and administrative	63,955	57,186	185,966	165,560
Research and development	29,192	27,585	87,725	80,373
Income from operations	117,350	100,413	375,988	315,220
Interest expense	(8,453)	(9,764)	(26,184)	(27,508)
Interest income	142	1,400	893	3,659
Income before provision for income taxes	109,039	92,049	350,697	291,371
Provision for income taxes	15,825	21,535	59,327	66,392
Net income	93,214	70,514	291,370	224,979
Less: Net (loss) income attributable to noncontrolling interest	(37)	3	(23)	92
Net income attributable to IDEXX Laboratories, Inc. stockholders	$ 93,251	$ 70,511	$ 291,393	$ 224,887
Earnings per Share:
Basic (in dollars per share)	$ 1.07	$ 0.81	$ 3.35	$ 2.56
Diluted (in dollars per share)	$ 1.05	$ 0.79	$ 3.29	$ 2.51
Weighted Average Shares Outstanding:
Basic (in shares)	86,756	87,537	87,029	87,884
Diluted (in shares)	88,453	89,256	88,687	89,735
Product revenue
Revenue:
Total revenue	$ 324,303	$ 291,031	$ 990,364	$ 867,087
Cost of Revenue:
Cost of service revenue	120,294	109,848	365,810	323,205
Service revenue
Revenue:
Total revenue	221,145	200,945	673,492	595,850
Cost of Revenue:
Cost of service revenue	$ 119,511	$ 108,126	$ 356,865	$ 314,824