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Credit Arrangements (Schedule of Long-Term Debt) (Details) - USD ($) $ in Thousands	Aug. 31, 2024	Aug. 31, 2023
Debt Instrument [Line Items]
Total debt	$ 115,492	$ 115,710
Less current portion	(228)	(226)
Less debt issuance costs	(270)	(320)
Total long-term debt	114,994	115,164
Elecsys Series 2006A Bonds [Member]
Debt Instrument [Line Items]
Total debt	492	710
Series A Senior Notes [Member]
Debt Instrument [Line Items]
Total debt	$ 115,000	$ 115,000

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