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Credit Arrangements (Schedule Of Line Of Credit Facilities) (Details) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2011	Aug. 31, 2011	Nov. 30, 2010
Credit Arrangements [Abstract]
BSI Term Note	$ 7,500	$ 8,571	$ 11,786
Less current portion	(4,286)	(4,286)	(4,286)
Long-term debt	$ 3,214	$ 4,285	$ 7,500

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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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Total of the portions of the carrying amounts as of the balance sheet date of long-term debt, which may include notes payable, bonds payable, debentures, mortgage loans, and commercial paper, which are scheduled to be repaid within one year or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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