Employee Benefit Plans (Components Of Net Periodic Pension Costs) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Employee Benefit Plans [Abstract]
Service cost	$ 18,821	$ 19,439	$ 15,464
Interest cost	19,499	16,953	19,436
Expected return on assets	(30,794)	(28,111)	(28,114)
Prior service cost and transition amortization	590	591	725
Actuarial loss amortization	7,403	10,362	5,696
Net periodic benefit cost	$ 15,519	$ 19,234	$ 13,207