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Industry Segment Information (Schedule of Segment Reporting Information Impacts on Statement of Operations, by Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
May 31, 2024 | May 31, 2023 | May 31, 2024 | May 31, 2023
Segment Reporting Information [Line Items] |  |  |  |
Total operating revenues | $ 139,199 | $ 164,553 | $ 452,076 | $ 506,953
Total operating income | 19,936 | 26,957 | 63,108 | 78,820
Interest and other expense, net | 237 | (1,225) | 757 | (3,350)
Earnings before income taxes | 20,173 | 25,732 | 63,865 | 75,470
Irrigation [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total operating revenues | 114,840 | 142,571 | 388,026 | 442,430
Total operating income | 19,524 | 30,727 | 70,480 | 92,188
Irrigation [Member] | North America [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total operating revenues | 68,235 | 75,027 | 240,457 | 249,315
Irrigation [Member] | International [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total operating revenues | 46,605 | 67,544 | 147,569 | 193,115
Infrastructure [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total operating revenues | 24,359 | 21,982 | 64,050 | 64,523
Total operating income | 6,276 | 3,556 | 13,401 | 8,947
Corporate Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total operating income | $ (5,864) | $ (7,326) | $ (20,773) | $ (22,315)

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