CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Net sales	$ 265,943	$ 289,745	$ 829,555	$ 865,367
Cost of goods sold	136,416	143,996	419,496	433,269
Gross margin	129,527	145,749	410,059	432,098
Operating expenses:
Research and development	9,814	11,437	31,298	33,837
Selling, general and administrative	83,223	94,691	260,136	281,988
Asset Impairment Charges	13,821	0	13,821	0
Total operating expenses	106,858	106,128	305,255	315,825
Operating income	22,669	39,621	104,804	116,273
Other income (expense):
Investment and other income	112	2,065	3,252	3,425
Interest expense	(628)	(708)	(1,976)	(2,137)
Income before income taxes	22,153	40,978	106,080	117,561
Income tax expense	8,520	6,197	21,396	22,916
Net income	$ 13,633	$ 34,781	$ 84,684	$ 94,645
Weighted average common shares outstanding:
Basic	52,607	52,766	53,023	52,499
Diluted	52,972	53,480	53,512	53,215
Class A nonvoting common stock
Earnings Per Share
Net earnings per share, basic	$ 0.26	$ 0.66	$ 1.60	$ 1.80
Net earnings per share, diluted	0.26	0.65	1.58	1.78
Dividends	0.22	0.21	0.65	0.64
Class B voting common stock
Earnings Per Share
Net earnings per share, basic	0.26	0.66	1.58	1.79
Net earnings per share, diluted	0.26	0.65	1.57	1.76
Dividends	$ 0.22	$ 0.21	$ 0.64	$ 0.62