Restructuring (Schedule Of Restructuring Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Apr. 30, 2013	Apr. 30, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 1,094	$ 2,796
Cost Of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	625	1,330
Operating Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 469	$ 1,466