CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2025	Apr. 30, 2024
Net sales	$ 382,590	$ 343,384	$ 1,116,330	$ 997,991
Cost of goods sold	187,531	166,357	555,739	487,162
Gross margin	195,059	177,027	560,591	510,829
Operating expenses:
Research and development	19,191	17,681	56,835	50,215
Selling, general and administrative	108,678	95,803	326,410	283,415
Total operating expenses	127,869	113,484	383,245	333,630
Operating income	67,190	63,543	177,346	177,199
Other (expense) income:
Investment and other (expense) income	(509)	1,596	2,850	4,718
Interest expense	(936)	(728)	(3,604)	(2,284)
Income before income taxes	65,745	64,411	176,592	179,633
Income tax expense	13,482	13,521	37,212	37,874
Net income	$ 52,263	$ 50,890	$ 139,380	$ 141,759
Weighted average common shares outstanding:
Basic	47,644	48,004	47,743	48,294
Diluted	48,066	48,386	48,196	48,640
Class A Nonvoting Common Stock
Earnings Per Share
Basic	$ 1.10	$ 1.06	$ 2.92	$ 2.94
Diluted	1.09	1.05	2.89	2.91
Class B Voting Common Stock
Earnings Per Share
Basic	1.10	1.06	2.90	2.92
Diluted	$ 1.09	$ 1.05	$ 2.88	$ 2.90