Consolidated Statements Of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Consolidated Statements Of Comprehensive Income [Abstract]
Gain (loss) on hedging derivatives, deferred taxes	$ (196)	$ 117	$ (280)
Pension and postretirement liability adjustment, deferred taxes	$ (25,656)	$ 23,527	$ (4,021)