Goodwill and Intangible Assets (Details1) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jan. 31, 2012 Y	Jul. 31, 2011 Y
Amortized other intangible assets:
Accumulated Amortization	$ (155,352)	$ (150,892)
Unamortized other intangible assets:
Gross Carrying Amount	234,442	240,853
Accumulated Amortization	(155,352)	(150,892)
Net Book Value	79,090	89,961
Trademarks [Member]
Unamortized other intangible assets:
Indefinite Lived Intangible Assets Net	39,242	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	10,023	9,784
Accumulated Amortization	(8,782)	(8,556)
Amortized other intangible assets, net book value	1,241	1,228
Unamortized other intangible assets:
Accumulated Amortization	(8,782)	(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	8,973	9,448
Accumulated Amortization	(7,016)	(6,559)
Amortized other intangible assets, net book value	1,957	2,849
Unamortized other intangible assets:
Accumulated Amortization	(7,016)	(6,559)
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	160,215	165,566
Accumulated Amortization	(124,044)	(119,977)
Amortized other intangible assets, net book value	36,171	45,589
Unamortized other intangible assets:
Accumulated Amortization	(124,044)	(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	15,989	16,432
Accumulated Amortization	(15,510)	(15,760)
Amortized other intangible assets, net book value	479	672
Unamortized other intangible assets:
Accumulated Amortization	$ (15,510)	$ (15,760)