CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Net sales	$ 321,475	$ 277,227
Cost of goods sold	166,487	141,799
Gross margin	154,988	135,428
Operating expenses:
Research and development	13,907	10,203
Selling, general and administrative	96,746	83,037
Total operating expenses	110,653	93,240
Operating income	44,335	42,188
Other income (expense):
Investment and other income	543	155
Interest expense	(182)	(106)
Income before income taxes and losses of unconsolidated affiliate	44,696	42,237
Income tax expense	9,650	8,582
Income (Loss) From Continuing Operations Before Income (Loss) From Equity Method Investments	35,046	33,655
Income (Loss) from Equity Method Investments	0	(174)
Net income	$ 35,046	$ 33,481
Weighted average common shares outstanding:
Weighted average common shares outstanding, basic (in thousands):	51,973	52,021
Weighted average common shares outstanding, diluted (in thousands):	52,436	52,292
Class A Nonvoting Common Stock
Earnings Per Share
Net income per share, basic	$ 0.67	$ 0.64
Net income per share, diluted	0.67	0.64
Class B Voting Common Stock
Earnings Per Share
Net income per share, basic	0.66	0.63
Net income per share, diluted	$ 0.65	$ 0.62