Goodwill And Other Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended
	Oct. 31, 2011	Jul. 31, 2011
Goodwill And Other Intangible Assets [Abstract]
Goodwill impairment	$ 0
Other intangible assets	51,637,000	53,496,000
Decrease of balance from other intangible assets	1,900,000
Amortization of existing intangible assets	1,500,000
Foreign exchange translation of intangible assets	400,000
Intangible asset additions	$ 0