Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2017
Net sales
Net sales	$ 918,155	$ 871,922	$ 770,157
Cost of sales
Cost of sales	490,701	457,951	402,997
Gross profit	427,454	413,971	367,160
Expenses:
Selling	140,232	129,642	116,113
General and administrative	172,383	138,019	122,270
Research and development	31,320	24,646	18,367
Total operating expenses	343,935	292,307	256,750
Income from operations	83,519	121,664	110,410
Interest expense, net	9,505	5,289	4,303
Other income	(1,305)	(1,138)	(126)
Income before income taxes	75,319	117,513	106,233
Income taxes	20,277	26,472	34,855
Net income	$ 55,042	$ 91,041	$ 71,378
Earnings per common share:
Basic (in dollars per share)	$ 1.32	$ 2.18	$ 1.71
Diluted (in dollars per share)	1.32	2.18	1.71
Dividends per common share (in dollars per share)	$ 0.20	$ 0.17	$ 0.14
Product sales
Net sales
Net sales	$ 795,403	$ 765,158	$ 684,678
Cost of sales
Cost of sales	406,514	385,597	343,641
Product service
Net sales
Net sales	122,752	106,764	85,479
Cost of sales
Cost of sales	$ 84,187	$ 72,354	$ 59,356