Long-Term Debt (Schedule Of Aggregate Maturities For Debt Outstanding) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015	Jul. 31, 2015
Debt Instrument [Line Items]
Interest Expense, Debt	$ 10,400	$ 13,700	$ 31,900	$ 41,100
Amortization of Financing Costs	200	400	700	1,100
2013	3,269		3,269
2014	13,354		13,354
2015	13,397		13,397
2016	13,455		13,455
2017	204,141		204,141
Thereafter	381,562		381,562
Total debt	$ 629,178	$ 636,749	$ 629,178	$ 636,749	$ 816,830