Summary of Quarterly Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Data [Abstract]

Schedule of Quarterly Data

A summary of quarterly data ⁽¹⁾ follows:

(in thousands, except per share data)	For the Three Months Ended
	March 31,		June 30,		September 30,		December 31,
2019
Revenue	$	576,056	$	620,103	$	605,303	$	605,446
Gross profit	$	331,597	$	357,853	$	344,950	$	331,149
Operating income	$	133,138	$	164,275	$	139,802	$	115,631
Net income attributable to IDEXX Laboratories, Inc. stockholders	$	102,681	$	125,706	$	108,837	$	90,496
Earnings per share:
Basic	$	1.19	$	1.46	$	1.26	$	1.05
Diluted	$	1.17	$	1.43	$	1.24	$	1.04
2018
Revenue	$	537,656	$	580,752	$	545,448	$	549,386
Gross profit	$	303,099	$	332,439	$	305,643	$	300,361
Operating income	$	113,044	$	145,594	$	117,350	$	115,347
Net income attributable to IDEXX Laboratories, Inc. stockholders	$	89,451	$	108,691	$	93,251	$	85,638
Earnings per share:
Basic	$	1.02	$	1.25	$	1.07	$	0.99
Diluted	$	1.01	$	1.23	$	1.05	$	0.98

(1)

Amounts presented may not recalculate to full-year totals due to rounding.