Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Net sales
Net sales	$ 1,016,048	$ 918,155	$ 871,922
Cost of sales
Cost of sales	580,075	490,701	457,951
Gross profit	435,973	427,454	413,971
Expenses:
Selling	157,732	140,232	129,642
General and administrative	197,562	172,383	138,019
Research and development	32,372	31,320	24,646
Total operating expenses	387,666	343,935	292,307
Income from operations	48,307	83,519	121,664
Interest expense, net	41,355	9,505	5,289
Other income	0	(1,305)	(1,138)
Income before income taxes	6,952	75,319	117,513
Income taxes	(6,756)	20,277	26,472
Net income	$ 13,708	$ 55,042	$ 91,041
Earnings per common share:
Basic (in dollars per share)	$ 0.32	$ 1.32	$ 2.18
Diluted (in dollars per share)	0.32	1.32	2.18
Dividends per common share (in dollars per share)	$ 0.105	$ 0.20	$ 0.17
Product sales
Net sales
Net sales	$ 892,277	$ 795,403	$ 765,158
Cost of sales
Cost of sales	499,843	406,514	385,597
Product service
Net sales
Net sales	123,771	122,752	106,764
Cost of sales
Cost of sales	$ 80,232	$ 84,187	$ 72,354