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Credit Arrangements (Schedule of Long-Term Debt) (Details) - USD ($) $ in Thousands | Aug. 31, 2023 | Aug. 31, 2022
--- | --- | ---
Debt Instrument [Line Items] |  |
Total debt | $ 115,710 | $ 115,931
Less current portion | (226) | (222)
Less debt issuance costs | (320) | (368)
Total long-term debt | 115,164 | 115,341
Elecsys Series 2006A Bonds [Member] |  |
Debt Instrument [Line Items] |  |
Total debt | 710 | 931
Series A Senior Notes [Member] |  |
Debt Instrument [Line Items] |  |
Total debt | $ 115,000 | $ 115,000

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