Long-Term Debt (Schedule Of Aggregate Maturities For Debt Outstanding) (Details) (USD $)	12 Months Ended
Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2009
Long-Term Debt
2012	$ 1,045,000
2013	949,000
2014	509,000
2015	533,000
2016	244,000
Thereafter	488,463,000
Total debt	491,743,000	526,711,000
Gross interest expense	34,200,000	33,800,000	35,200,000
Amortization of deferred financing costs	1,700,000	1,600,000	2,000,000
Interest capitalized	$ 600,000	$ 16,300,000	$ 7,600,000

The component of interest expense comprised of the periodic charge against earnings over the life of the financing arrangement to which such costs relate. Alternate captions include Noncash Interest Expense.

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The amount of interest that was capitalized during the period.

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Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings.

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Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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Amount of long-term debt maturities after year five following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates.

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Amount of long-term debt maturing within the next twelve months following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates.

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Amount of long-term debt maturing in year five following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates.

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Amount of long-term debt maturing in year four following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates.

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Amount of long-term debt maturing in year three following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates.

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