v3.26.1
Business Segments (Schedule of Segment Reporting Information, by Segment) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
May 31, 2026
May 31, 2025
May 31, 2026
May 31, 2025
Segment Reporting Information [Line Items]        
Operating revenues $ 160,764 $ 169,464 $ 474,297 $ 522,809
Cost of operating revenues 112,932 115,842 334,014 356,734
Gross profit 47,832 53,622 140,283 166,075
Operating expenses 29,319 29,829 89,151 89,276
Segment operating income 18,513 23,793 51,132 76,799
Operating Segments [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 160,764 169,464 474,297 522,809
Cost of operating revenues 112,932 115,842 334,014 356,734
Gross profit 47,832 53,622 140,283 166,075
Operating expenses 22,095 21,042 66,454 64,003
Segment operating income 25,737 32,580 73,829 102,072
Unallocated Corporate Expenses [Member]        
Segment Reporting Information [Line Items]        
Segment operating income 7,224 8,787 22,697 25,273
North America [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 61,349 69,082 206,704 223,793
International [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 71,684 74,663 201,003 215,178
Irrigation [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 133,033 143,745 407,707 438,971
Irrigation [Member] | Operating Segments [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 133,033 143,745 407,707 438,971
Cost of operating revenues 95,238 100,331 292,642 309,332
Gross profit 37,795 43,414 115,065 129,639
Operating expenses 17,459 16,260 52,297 50,373
Segment operating income 20,336 27,154 62,768 79,266
Infrastructure [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 27,731 25,719 66,590 83,838
Infrastructure [Member] | Operating Segments [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 27,731 25,719 66,590 83,838
Cost of operating revenues 17,694 15,511 41,372 47,402
Gross profit 10,037 10,208 25,218 36,436
Operating expenses 4,636 4,782 14,157 13,630
Segment operating income $ 5,401 $ 5,426 $ 11,061 $ 22,806