Revenue Recognition (Schedule of Disaggregation of Revenue by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2024	May 31, 2023
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	$ 133,658	$ 160,771	$ 434,805	$ 498,667
Lease revenue	5,541	3,782	17,271	8,286
Total operating revenues	139,199	164,553	452,076	506,953
Point in Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	124,980	152,807	408,019	474,955
Over Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	8,678	7,964	26,786	23,712
Irrigation [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	114,840	142,571	388,026	442,430
Lease revenue	0	0	0	0
Total operating revenues	114,840	142,571	388,026	442,430
Irrigation [Member] | Point in Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	107,438	135,990	365,184	423,212
Irrigation [Member] | Over Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	7,402	6,581	22,842	19,218
Infrastructure [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	18,818	18,200	46,779	56,237
Lease revenue	5,541	3,782	17,271	8,286
Total operating revenues	24,359	21,982	64,050	64,523
Infrastructure [Member] | Point in Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	17,542	16,817	42,835	51,743
Infrastructure [Member] | Over Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	$ 1,276	$ 1,383	$ 3,944	$ 4,494