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Revenue Recognition (Schedule of Disaggregation of Revenue by Segment) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Feb. 28, 2025
Feb. 29, 2024
Feb. 28, 2025
Feb. 29, 2024
Disaggregation Of Revenue [Line Items]        
Revenue from the contracts with customers $ 183,834 $ 146,798 $ 344,381 $ 301,148
Lease revenue 3,230 4,721 8,964 11,729
Total operating revenues 187,064 151,519 353,345 312,877
Point in Time [Member]        
Disaggregation Of Revenue [Line Items]        
Revenue from the contracts with customers 174,188 137,584 325,658 283,040
Over Time [Member]        
Disaggregation Of Revenue [Line Items]        
Revenue from the contracts with customers 9,646 9,214 18,723 18,108
Irrigation [Member]        
Disaggregation Of Revenue [Line Items]        
Revenue from the contracts with customers 148,139 133,018 295,226 273,186
Lease revenue 0 0 0 0
Total operating revenues 148,139 133,018 295,226 273,186
Irrigation [Member] | Point in Time [Member]        
Disaggregation Of Revenue [Line Items]        
Revenue from the contracts with customers 140,268 125,241 279,636 257,746
Irrigation [Member] | Over Time [Member]        
Disaggregation Of Revenue [Line Items]        
Revenue from the contracts with customers 7,871 7,777 15,590 15,440
Infrastructure [Member]        
Disaggregation Of Revenue [Line Items]        
Revenue from the contracts with customers 35,695 13,780 49,155 27,962
Lease revenue 3,230 4,721 8,964 11,729
Total operating revenues 38,925 18,501 58,119 39,691
Infrastructure [Member] | Point in Time [Member]        
Disaggregation Of Revenue [Line Items]        
Revenue from the contracts with customers 33,920 12,343 46,022 25,294
Infrastructure [Member] | Over Time [Member]        
Disaggregation Of Revenue [Line Items]        
Revenue from the contracts with customers $ 1,775 $ 1,437 $ 3,133 $ 2,668