Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Net sales
Net sales	$ 228,552	$ 217,268	$ 678,679	$ 643,068
Cost of sales
Cost of sales	121,675	112,594	361,878	336,500
Gross profit	106,877	104,674	316,801	306,568
Expenses:
Selling	36,077	33,252	103,233	95,774
General and administrative	48,634	37,784	122,527	102,068
Research and development	7,354	6,571	22,355	17,543
Total operating expenses	92,065	77,607	248,115	215,385
Income from operations	14,812	27,067	68,686	91,183
Interest expense, net	2,509	1,498	6,742	3,822
Other income, net	0	0	(1,313)	(1,138)
Income before income taxes	12,303	25,569	63,257	88,499
Income taxes	4,128	6,833	17,040	14,346
Net income	$ 8,175	$ 18,736	$ 46,217	$ 74,153
Earnings per common share:
Basic (in dollars per share)	$ 0.20	$ 0.45	$ 1.11	$ 1.78
Diluted (in dollars per share)	0.20	0.45	1.11	1.77
Dividends per common share (in dollars per share)	$ 0.00	$ 0.00	$ 0.10	$ 0.09
Product sales
Net sales
Net sales	$ 197,478	$ 189,861	$ 587,251	$ 564,310
Cost of sales
Cost of sales	99,867	93,762	299,595	283,005
Product service
Net sales
Net sales	31,074	27,407	91,428	78,758
Cost of sales
Cost of sales	$ 21,808	$ 18,832	$ 62,283	$ 53,495