Employee Benefit Plans (Components Of Net Periodic Pension Costs) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Employee Benefit Plans [Abstract]
Service cost	$ 19,439	$ 15,464	$ 16,148
Interest cost	16,953	19,436	19,440
Expected return on assets	(28,111)	(28,114)	(27,538)
Prior service cost amortization	591	725	674
Actuarial loss amortization	10,362	5,696	3,962
Net periodic benefit cost	$ 19,234	$ 13,207	$ 12,686