Capitalized And Purchased Software Product Costs (Schedule Of Capitalized And Purchased Software Product Costs) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2010
Capitalized and Purchased Software Product Costs [Abstract]
Amounts capitalized for software product costs	$ 18,247	$ 16,693	$ 15,919
Less accumulated amortization	(15,298)	(13,878)	(13,524)
Capitalized costs	1,554	1,547
Software product costs, disposals		(773)
Accumulated amortization, disposals		773
Capitalized computer software, amortization	(1,420)	(1,127)
Net capitalized software product costs	$ 2,949	$ 2,815	$ 2,395