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Credit Arrangements (Schedule Of Outstanding Long-Term Debt) (Details) (USD $) In Thousands, unless otherwise specified	May 31, 2012	Aug. 31, 2011	May 31, 2011
Credit Arrangements [Abstract]
BSI Term Note	$ 5,357	$ 8,571	$ 9,643
Less current portion	(4,286)	(4,286)	(4,286)
Long-term debt	$ 1,071	$ 4,285	$ 5,357

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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.

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Carrying amount of long-term debt, net of unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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