Long-Term Debt (Schedule Of Aggregate Maturities For Debt Outstanding) (Details) (USD $)	3 Months Ended	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Long-term Debt, Other Disclosures [Abstract]
2013	$ 1,022,000	$ 1,022,000
2014	266,000	266,000
2015	270,000	270,000
2016	271,000	271,000
2017	215,286,000	215,286,000
Thereafter	409,507,000	409,507,000
Total debt	626,622,000	626,622,000	796,922,000
Gross interest expense	64,000,000		39,000,000	33,700,000
Amortization of deferred financing costs		1,900,000	2,000,000	1,900,000
Interest capitalized	$ 0		$ 0	$ 100,000