Revenue Recognition (Schedule of Disaggregation of Revenue by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2024	Nov. 30, 2023
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	$ 160,547	$ 154,350
Lease revenue	5,734	7,008
Total operating revenues	166,281	161,358
Point in Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	151,470	144,152
Over Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	9,077	10,198
Irrigation [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	147,087	140,168
Lease revenue	0	0
Total operating revenues	147,087	140,168
Irrigation [Member] | Point in Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	139,368	131,201
Irrigation [Member] | Over Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	7,719	8,967
Infrastructure [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	13,460	14,182
Lease revenue	5,734	7,008
Total operating revenues	19,194	21,190
Infrastructure [Member] | Point in Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	12,102	12,951
Infrastructure [Member] | Over Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	$ 1,358	$ 1,231