Valuation And Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Valuation and Qualifying Accounts [Abstract]
Balance at Beginning of Period	$ 6,763	$ 7,040	$ 6,418
Charged to Costs and Expenses	1,760	393	1,241
Charged to Other Accounts	(789)	(1)	230
Deductions	(987)	(669)	(849)
Balance at End of Period	$ 6,747	$ 6,763	$ 7,040