CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue:
Total revenue	$ 605,303	$ 545,448	$ 1,801,462	$ 1,663,856
Cost of Revenue:
Cost of service revenue	260,353	239,805	767,062	722,675
Gross profit	344,950	305,643	1,034,400	941,181
Expenses:
Sales and marketing	104,551	95,146	312,499	291,502
General and administrative	66,337	63,955	186,653	185,966
Research and development	34,260	29,192	98,033	87,725
Income from operations	139,802	117,350	437,215	375,988
Interest expense	(7,090)	(8,453)	(23,662)	(26,184)
Interest income	86	142	159	893
Income before provision for income taxes	132,798	109,039	413,712	350,697
Provision for income taxes	23,960	15,825	76,464	59,327
Net income	108,838	93,214	337,248	291,370
Less: Net income (loss) attributable to noncontrolling interest	1	(37)	24	(23)
Net income attributable to IDEXX Laboratories, Inc. stockholders	$ 108,837	$ 93,251	$ 337,224	$ 291,393
Earnings per Share:
Basic (in dollars per share)	$ 1.26	$ 1.07	$ 3.91	$ 3.35
Diluted (in dollars per share)	$ 1.24	$ 1.05	$ 3.85	$ 3.29
Weighted Average Shares Outstanding:
Basic (in shares)	86,198	86,756	86,206	87,029
Diluted (in shares)	87,667	88,453	87,633	88,687
Product revenue
Revenue:
Total revenue	$ 360,000	$ 324,303	$ 1,059,696	$ 990,364
Cost of Revenue:
Cost of service revenue	125,112	120,294	370,388	365,810
Service revenue
Revenue:
Total revenue	245,303	221,145	741,766	673,492
Cost of Revenue:
Cost of service revenue	$ 135,241	$ 119,511	$ 396,674	$ 356,865