Summary Of Significant Accounting Policies (Components Of Inventory) (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2012	Jul. 31, 2011
Summary Of Significant Accounting Policies [Abstract]
Materials	$ 111,808	$ 110,466
Work in process	30,767	33,917
Finished products	113,541	127,093
Total inventories	$ 256,116	$ 271,476