CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Net sales	$ 289,745	$ 298,421	$ 865,367	$ 876,352
Cost of goods sold	143,996	147,339	433,269	435,513
Gross margin	145,749	151,082	432,098	440,839
Operating expenses:
Research and development	11,437	11,678	33,837	33,512
Selling, general and administrative	94,691	101,695	281,988	299,411
Total operating expenses	106,128	113,373	315,825	332,923
Operating income	39,621	37,709	116,273	107,916
Other income (expense):
Investment and other income	2,065	31	3,425	1,303
Interest expense	(708)	(761)	(2,137)	(2,453)
Income before income taxes	40,978	36,979	117,561	106,766
Income tax expense	6,197	10,979	22,916	50,657
Net income	$ 34,781	$ 26,000	$ 94,645	$ 56,109
Weighted average common shares outstanding (in thousands):
Basic	52,766	51,747	52,499	51,628
Diluted	53,480	52,729	53,215	52,610
Class A nonvoting common stock
Earnings Per Share
Net earnings per share, basic	$ 0.66	$ 0.50	$ 1.80	$ 1.09
Net earnings per share, diluted	0.65	0.49	1.78	1.07
Dividends	0.21	0.21	0.64	0.62
Class B voting common stock
Earnings Per Share
Net earnings per share, basic	0.66	0.50	1.79	1.07
Net earnings per share, diluted	0.65	0.49	1.76	1.05
Dividends	$ 0.21	$ 0.21	$ 0.62	$ 0.61