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Revenue Recognition (Schedule of Disaggregation of Revenue by Segment) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Nov. 30, 2023
Nov. 30, 2022
Disaggregation Of Revenue [Line Items]    
Revenue from the contracts with customers $ 154,350 $ 173,767
Lease revenue 7,008 2,392
Total operating revenues 161,358 176,159
Point in Time [Member]    
Disaggregation Of Revenue [Line Items]    
Revenue from the contracts with customers 144,152 165,946
Over Time [Member]    
Disaggregation Of Revenue [Line Items]    
Revenue from the contracts with customers 10,198 7,821
Irrigation [Member]    
Disaggregation Of Revenue [Line Items]    
Revenue from the contracts with customers 140,168 152,083
Lease revenue 0 0
Total operating revenues 140,168 152,083
Irrigation [Member] | Point in Time [Member]    
Disaggregation Of Revenue [Line Items]    
Revenue from the contracts with customers 131,201 145,716
Irrigation [Member] | Over Time [Member]    
Disaggregation Of Revenue [Line Items]    
Revenue from the contracts with customers 8,967 6,367
Infrastructure [Member]    
Disaggregation Of Revenue [Line Items]    
Revenue from the contracts with customers 14,182 21,684
Lease revenue 7,008 2,392
Total operating revenues 21,190 24,076
Infrastructure [Member] | Point in Time [Member]    
Disaggregation Of Revenue [Line Items]    
Revenue from the contracts with customers 12,951 20,230
Infrastructure [Member] | Over Time [Member]    
Disaggregation Of Revenue [Line Items]    
Revenue from the contracts with customers $ 1,231 $ 1,454