Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016
Net sales
Product sales	$ 765,158	$ 684,678	$ 584,750
Product service	106,764	85,479	80,005
Total net sales	871,922	770,157	664,755
Cost of sales
Product sales	385,597	343,641	300,704
Product service	72,354	59,356	54,865
Total cost of sales	457,951	402,997	355,569
Gross profit	413,971	367,160	309,186
Expenses:
Selling	129,642	116,113	99,062
General and administrative	138,019	122,270	97,463
Research and development	24,646	18,367	15,410
Total operating expenses	292,307	256,750	211,935
Income from operations	121,664	110,410	97,251
Interest expense, net	5,289	4,303	3,320
Other income	(1,138)	(126)	0
Income before income taxes	117,513	106,233	93,931
Income taxes	26,472	34,855	33,978
Net income	$ 91,041	$ 71,378	$ 59,953
Earnings per common share:
Basic (in dollars per share)	$ 2.18	$ 1.71	$ 1.44
Diluted (in dollars per share)	2.18	1.71	1.44
Dividends per common share (in dollars per share)	$ 0.17	$ 0.14	$ 0.12