CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2021
Net sales	$ 1,331,863	$ 1,302,062	$ 1,144,698
Cost of goods sold	674,588	670,510	583,252
Gross margin	657,275	631,552	561,446
Operating expenses:
Research and development	61,365	58,548	44,551
Selling, general and administrative	370,697	379,992	349,768
Total operating expenses	432,062	438,540	394,319
Operating income	225,213	193,012	167,127
Other income (expense):
Investment and other income	4,022	244	4,333
Interest expense	(3,539)	(1,276)	(437)
Income before income taxes and losses of unconsolidated affiliate	225,696	191,980	171,023
Income tax expense	50,839	42,001	35,610
Income before losses of unconsolidated affiliate	174,857	149,979	135,413
Equity in losses of unconsolidated affiliate	0	0	(5,754)
Net income	$ 174,857	$ 149,979	$ 129,659
Weighted average common shares outstanding:
Basic	49,591	51,321	52,039
Diluted	49,869	51,651	52,409
Class A Nonvoting Common Stock
Earnings per share:
Basic	$ 3.53	$ 2.92	$ 2.49
Diluted	3.51	2.90	2.47
Class B Voting Common Stock
Earnings per share:
Basic	3.51	2.91	2.48
Diluted	$ 3.49	$ 2.89	$ 2.46