Employee Benefit Plans (Components Of Net Periodic Pension Costs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013
Employee Benefit Plans [Abstract]
Service cost	$ 4,719	$ 4,866	$ 14,104	$ 14,607
Interest cost	4,885	4,222	14,602	12,733
Expected return on assets	(7,691)	(7,008)	(22,970)	(21,100)
Prior service cost and transition amortization	147	162	443	482
Actuarial loss amortization	1,853	2,563	5,551	7,712
Net periodic benefit cost	$ 3,913	$ 4,805	$ 11,730	$ 14,434