CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
Net sales	$ 286,947	$ 293,196
Cost of goods sold	145,542	146,657
Gross margin	141,405	146,539
Operating expenses:
Research and development	10,967	11,326
Selling, general and administrative	89,547	94,591
Total operating expenses	100,514	105,917
Operating income	40,891	40,622
Other income (expense):
Investment and other income (expense)	1,380	(17)
Interest expense	(701)	(712)
Income before income taxes	41,570	39,893
Income tax expense	4,072	9,256
Net income	$ 37,498	$ 30,637
Weighted average common shares outstanding:
Weighted average common shares outstanding, basic (in thousands):	53,143	52,201
Weighted average common shares outstanding, diluted (in thousands):	53,736	52,958
Class A Nonvoting Common Stock
Earnings Per Share
Net income per share, basic	$ 0.71	$ 0.59
Net income per share, diluted	0.70	0.58
Dividends	0.22	0.21
Class B Voting Common Stock
Earnings Per Share
Net income per share, basic	0.69	0.57
Net income per share, diluted	0.68	0.56
Dividends	$ 0.20	$ 0.20