Goodwill And Other Intangible Assets (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net	$ 36,045	$ 41,307
Patents, Trademarks, And Tradenames [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net	11,500	13,300
Weighted average life	7 years 11 months 12 days
Customer Related Intangible Assets [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net	$ 24,500	$ 28,000
Weighted average life	11 years 1 month 17 days