Goodwill And Other Intangible Assets (Narrative) (Details) (USD $)	9 Months Ended
	Apr. 30, 2012	Jul. 31, 2011
Goodwill And Other Intangible Assets [Abstract]
Other intangible assets	$ 48,252,000	$ 53,496,000
Decrease of balance from other intangible assets	5,200,000
Amortization of existing intangible assets	4,300,000
Decrease in other intangible assets due to foreign exchange translation	$ 900,000