Long-Term Debt (Schedule Of Aggregate Maturities For Debt Outstanding) (Details) (USD $)	3 Months Ended	9 Months Ended
Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014	Jul. 31, 2014
Debt Instrument [Line Items]
Interest Expense, Debt	$ 13,700,000us-gaap_InterestExpenseDebt	$ 16,400,000us-gaap_InterestExpenseDebt	$ 41,100,000us-gaap_InterestExpenseDebt	$ 48,700,000us-gaap_InterestExpenseDebt
Amortization of Financing Costs	400,000us-gaap_AmortizationOfFinancingCosts	500,000us-gaap_AmortizationOfFinancingCosts	1,100,000us-gaap_AmortizationOfFinancingCosts	1,500,000us-gaap_AmortizationOfFinancingCosts
2013	256,319,000		256,319,000
2014	779,000		779,000
2015	854,000		854,000
2016	897,000		897,000
2017	955,000		955,000
Thereafter	376,945,000		376,945,000
Total debt	$ 636,749,000us-gaap_LongTermDebt	$ 800,102,000us-gaap_LongTermDebt	$ 636,749,000us-gaap_LongTermDebt	$ 800,102,000us-gaap_LongTermDebt	$ 626,622,000us-gaap_LongTermDebt

Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

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-Topic 225

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-Section S99

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-Publisher SEC

-Name Regulation S-X (SX)

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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-SubTopic 10

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Subparagraph (SX 210.12-04.(a))

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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