Industry Segment Information (Schedule of Segment Reporting Information, by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2024	Nov. 30, 2023
Segment Reporting Information [Line Items]
Total operating revenues	$ 166,281	$ 161,358
Total operating income	20,883	21,074
Interest and other expense, net	1,151	(79)
Earnings before income taxes	22,034	20,995
Irrigation [Member]
Segment Reporting Information [Line Items]
Total operating revenues	147,087	140,168
Total operating income	24,736	25,307
Irrigation [Member] | North America [Member]
Segment Reporting Information [Line Items]
Total operating revenues	77,669	89,377
Irrigation [Member] | International [Member]
Segment Reporting Information [Line Items]
Total operating revenues	69,418	50,791
Infrastructure [Member]
Segment Reporting Information [Line Items]
Total operating revenues	19,194	21,190
Total operating income	4,124	3,619
Corporate Segment
Segment Reporting Information [Line Items]
Total operating income	$ (7,977)	$ (7,852)