CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013	Apr. 30, 2012
Net sales	$ 305,737	$ 275,388	$ 856,408	$ 813,573
Cost of products sold	146,031	123,641	403,888	367,330
Gross margin	159,706	151,747	452,520	446,243
Operating expenses:
Research and development	8,062	8,200	24,162	25,657
Selling, general and administrative	112,148	98,614	321,909	293,518
Restructuring charges	8,540	1,977	10,487	1,977
Total operating expenses	128,750	108,791	356,558	321,152
Operating income	30,956	42,956	95,962	125,091
Other income and (expense):
Investment and other income	1,131	1,108	2,427	1,719
Interest expense	(4,185)	(4,735)	(12,755)	(14,715)
Earnings from continuing operations before income taxes	27,902	39,329	85,634	112,095
Income taxes	6,064	11,290	47,965	27,767
Earnings from continuing operations	21,838	28,039	37,669	84,328
(Loss) from discontinued operations, net of income taxes	(17,605)	(387)	(14,933)	(113,898)
Net earnings (loss)	4,233	27,652	22,736	(29,570)
Weighted average common shares outstanding (in thousands):
Basic	51,415	52,513	51,210	52,539
Diluted	52,041	53,003	51,685	52,946
Class A nonvoting common stock [Member]
Other income and (expense):
Earnings from continuing operations	21,778	27,982	37,490	84,156
Earnings per share:
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.42	$ 0.53	$ 0.73	$ 1.60
Income (Loss) from Continuing Operations, Per Diluted Share	$ 0.42	$ 0.53	$ 0.73	$ 1.59
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	$ (0.34)	$ 0.00	$ (0.29)	$ (2.17)
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share	$ (0.34)	$ (0.01)	$ (0.29)	$ (2.16)
Earnings Per Share, Basic	$ 0.08	$ 0.53	$ 0.44	$ (0.57)
Earnings Per Share, Diluted	$ 0.08	$ 0.52	$ 0.44	$ (0.57)
Dividends	$ 0.19	$ 0.185	$ 0.57	$ 0.555
Class B voting common stock [Member]
Other income and (expense):
Earnings from continuing operations	$ 21,778	$ 27,982	$ 36,688	$ 83,333
Earnings per share:
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.42	$ 0.53	$ 0.72	$ 1.59
Income (Loss) from Continuing Operations, Per Diluted Share	$ 0.42	$ 0.53	$ 0.71	$ 1.57
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	$ (0.34)	$ 0.00	$ (0.30)	$ (2.17)
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share	$ (0.34)	$ (0.01)	$ (0.29)	$ (2.15)
Earnings Per Share, Basic	$ 0.08	$ 0.53	$ 0.42	$ (0.58)
Earnings Per Share, Diluted	$ 0.08	$ 0.52	$ 0.42	$ (0.58)
Dividends	$ 0.19	$ 0.185	$ 0.55	$ 0.538