Long-Term Debt (Schedule Of Aggregate Maturities For Debt Outstanding) (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Jul. 31, 2015
Debt Instrument [Line Items]
Interest Expense, Debt	$ 10,600	$ 13,600
Amortization of Financing Costs	200	400
2013	9,790
2014	13,354
2015	13,397
2016	13,455
2017	401,641
Thereafter	378,740
Total debt	$ 830,377	$ 820,260	$ 816,830