Business Segments (Schedule of Segment Reporting Information Impacts on Statement of Operations, by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2025	May 31, 2024	May 31, 2025	May 31, 2024
Segment Reporting Information [Line Items]
Total operating revenues	$ 169,464	$ 139,199	$ 522,809	$ 452,076
Total operating income	23,793	19,936	76,799	63,108
Interest and other expense, net	1,921	237	4,162	757
Earnings before income taxes	25,714	20,173	80,961	63,865
Irrigation [Member]
Segment Reporting Information [Line Items]
Total operating revenues	143,745	114,840	438,971	388,026
Total operating income	27,154	19,524	79,266	70,480
Irrigation [Member] | North America [Member]
Segment Reporting Information [Line Items]
Total operating revenues	69,082	68,235	223,793	240,457
Irrigation [Member] | International [Member]
Segment Reporting Information [Line Items]
Total operating revenues	74,663	46,605	215,178	147,569
Infrastructure [Member]
Segment Reporting Information [Line Items]
Total operating revenues	25,719	24,359	83,838	64,050
Total operating income	5,426	6,276	22,806	13,401
Corporate Segment
Segment Reporting Information [Line Items]
Total operating income	$ (8,787)	$ (5,864)	$ (25,273)	$ (20,773)