Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue:
Total revenue	$ 580,752	$ 508,940	$ 1,118,408	$ 970,961
Cost of Revenue:
Cost of product revenue	127,270	110,330	245,516	213,357
Cost of service revenue	121,043	105,895	237,354	206,698
Total cost of revenue	248,313	216,225	482,870	420,055
Gross profit	332,439	292,715	635,538	550,906
Expenses:
Sales and marketing	96,255	87,693	196,356	174,937
General and administrative	61,080	55,460	122,011	108,374
Research and development	29,510	26,998	58,533	52,788
Income from operations	145,594	122,564	258,638	214,807
Interest expense	(8,457)	(9,155)	(17,731)	(17,744)
Interest income	172	1,176	751	2,259
Income before provision for income taxes	137,309	114,585	241,658	199,322
Provision for income taxes	28,629	29,178	43,502	44,857
Net income	108,680	85,407	198,156	154,465
Less: Net (loss) income attributable to noncontrolling interest	(11)	50	14	89
Net income attributable to IDEXX Laboratories, Inc. stockholders	$ 108,691	$ 85,357	$ 198,142	$ 154,376
Earnings per Share:
Basic (in dollars per share)	$ 1.25	$ 0.97	$ 2.27	$ 1.75
Diluted (in dollars per share)	$ 1.23	$ 0.95	$ 2.23	$ 1.72
Weighted Average Shares Outstanding:
Basic (in shares)	87,004	88,004	87,166	88,060
Diluted (in shares)	88,596	89,878	88,786	89,962
Product revenue
Revenue:
Total revenue	$ 348,621	$ 304,091	$ 666,061	$ 576,056
Service revenue
Revenue:
Total revenue	$ 232,131	$ 204,849	$ 452,347	$ 394,905