Goodwill and Intangible Assets (Details1) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Oct. 31, 2011 Year	Jul. 31, 2011 Year
Amortized other intangible assets:
Accumulated Amortization	$ (153,023)	$ (150,892)
Unamortized other intangible assets:
Gross Carrying Amount	237,484	240,853
Accumulated Amortization	(153,023)	(150,892)
Net Book Value	84,461	89,961
Trademarks [Member]
Unamortized other intangible assets:
Indefinite Lived Intangible Assets Net	39,480	39,623
Patents [Member]
Amortized other intangible assets:
Amortized other intangible assets, weighted average amortization period (years)	5	5
Amortized other intangible assets, gross carrying amount	9,939	9,784
Accumulated Amortization	(8,604)	(8,556)
Amortized other intangible assets, net book value	1,335	1,228
Unamortized other intangible assets:
Accumulated Amortization	(8,604)	(8,556)
Trademarks and other [Member]
Amortized other intangible assets:
Amortized other intangible assets, weighted average amortization period (years)	7	7
Amortized other intangible assets, gross carrying amount	9,292	9,448
Accumulated Amortization	(7,025)	(6,599)
Amortized other intangible assets, net book value	2,267	2,849
Unamortized other intangible assets:
Accumulated Amortization	(7,025)	(6,599)
Customer relationships [Member]
Amortized other intangible assets:
Amortized other intangible assets, weighted average amortization period (years)	7	7
Amortized other intangible assets, gross carrying amount	162,659	165,566
Accumulated Amortization	(121,832)	(119,977)
Amortized other intangible assets, net book value	40,827	45,589
Unamortized other intangible assets:
Accumulated Amortization	(121,832)	(119,977)
Non-compete agreements and other [Member]
Amortized other intangible assets:
Amortized other intangible assets, weighted average amortization period (years)	4	4
Amortized other intangible assets, gross carrying amount	16,114	16,432
Accumulated Amortization	(15,562)	(15,760)
Amortized other intangible assets, net book value	552	672
Unamortized other intangible assets:
Accumulated Amortization	$ (15,562)	$ (15,760)