Revenue Recognition (Schedule of Disaggregation of Revenue by Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2024	Aug. 31, 2023	Aug. 31, 2022
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	$ 584,256	$ 661,905	$ 760,263
Lease revenue	22,818	12,179	10,480
Total operating revenues	607,074	674,084	770,743
Irrigation [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	513,896	586,031	665,829
Lease revenue	0	0	0
Total operating revenues	513,896	586,031	665,829
Infrastructure [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	70,360	75,874	94,434
Lease revenue	22,818	12,179	10,480
Total operating revenues	93,178	88,053	104,914
Point in Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	550,611	629,366	731,850
Point in Time [Member] | Irrigation [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	485,790	559,826	643,169
Point in Time [Member] | Infrastructure [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	64,821	69,540	88,681
Over Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	33,645	32,539	28,413
Over Time [Member] | Irrigation [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	28,106	26,205	22,660
Over Time [Member] | Infrastructure [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	$ 5,539	$ 6,334	$ 5,753