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Credit Arrangements (Long-Term Debt) (Details) $ in Thousands	Aug. 31, 2015 USD ($)
Debt Instrument [Line Items]
Long-term debt	$ 117,366
Less current portion	(193)
Total long-term debt	117,173
Senior Notes [Member]
Debt Instrument [Line Items]
Long-term debt	115,000
Senior Notes [Member] | Elecsys Series 2006A Bonds [Member] | Amended Credit Facility [Member]
Debt Instrument [Line Items]
Long-term debt	$ 2,366

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- Definition

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 942



-SubTopic 210



-Section S99



-Paragraph 1



-Subparagraph (SX 210.9-03.16)



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-Name Regulation S-X (SX)



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Amount of long-term debt, after 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.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



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