Summary Of Significant Accounting Policies (Components Of Property, Plant And Equipment) (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Summary Of Significant Accounting Policies [Abstract]
Land	$ 20,558	$ 21,116
Buildings	273,599	270,022
Machinery and equipment	753,637	687,797
Construction in progress	51,394	46,078
Less accumulated depreciation	(647,523)	(605,733)
Property, plant, and equipment, net	$ 451,665	$ 419,280	$ 384,909