Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net	$ 37,870	$ 36,045
Patents Trademarks And Tradenames [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net	$ 8,800	11,500
Weighted average life	7 years
Customer Relationships [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net	$ 29,100	$ 24,500
Weighted average life	9 years 10 months 24 days