Consolidated Statements of Income (USD $) In Thousands, except Share data	12 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2009
Net sales	$ 1,339,597	$ 1,259,096	$ 1,208,702
Cost of products sold	683,401	635,799	631,119
Gross margin	656,196	623,297	577,583
Operating expenses:
Research and development	43,001	42,621	34,181
Selling, general and administrative	441,815	435,906	397,180
Restructuring charges	9,188	15,314	25,849
Total operating expenses	494,004	493,841	457,210
Operating income	162,192	129,456	120,373
Other income (expense):
Investment and other income - net	3,990	1,168	1,800
Interest expense	(22,124)	(21,222)	(24,901)
Net other expense	(18,134)	(20,054)	(23,101)
Income before income taxes	144,058	109,402	97,272
Income taxes	35,406	27,446	27,150
Net income	$ 108,652	$ 81,956	$ 70,122
Weighted average Class A and Class B common shares outstanding
Basic	52,639,355	52,402,387	52,558,657
Diluted	53,133,000	52,946,000	52,866,000
Class A nonvoting common stock
Net income per common share:
Basic	$ 2.06	$ 1.56	$ 1.33
Diluted	$ 2.04	$ 1.55	$ 1.32
Dividends	$ 0.72	$ 0.70	$ 0.68
Class B Common Stock
Net income per common share:
Basic	$ 2.04	$ 1.55	$ 1.32
Diluted	$ 2.03	$ 1.53	$ 1.31
Dividends	$ 0.70	$ 0.68	$ 0.66