Revenue Recognition (Schedule of Disaggregation of Revenue by Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2025	Aug. 31, 2024	Aug. 31, 2023
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	$ 659,074	$ 584,256	$ 661,905
Lease revenue	17,294	22,818	12,179
Total operating revenues	676,368	607,074	674,084
Point in Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	618,865	550,611	629,366
Over Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	40,209	33,645	32,539
Irrigation [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	568,000	513,896	586,031
Lease revenue	0	0	0
Total operating revenues	568,000	513,896	586,031
Irrigation [Member] | Point in Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	534,492	485,790	559,826
Irrigation [Member] | Over Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	33,508	28,106	26,205
Infrastructure [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	91,074	70,360	75,874
Lease revenue	17,294	22,818	12,179
Total operating revenues	108,368	93,178	88,053
Infrastructure [Member] | Point in Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	84,373	64,821	69,540
Infrastructure [Member] | Over Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	$ 6,701	$ 5,539	$ 6,334