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Investments in Unconsolidated Affiliates - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Nov. 30, 2024	Nov. 30, 2023	Nov. 30, 2024	Nov. 30, 2023	May 31, 2024
Investments in and Advances to Affiliates [Line Items]
Investments in unconsolidated affiliates	$ 135,218,000		$ 135,218,000		$ 144,863,000
Excess dividends received from investing activity	$ 0	$ 1,085,000		$ 1,085,000
ClarkDietrich
Investments in and Advances to Affiliates [Line Items]
Percent of ownership interest held in unconsolidated affiliates	25.00%		25.00%
Sustainable Energy Solutions
Investments in and Advances to Affiliates [Line Items]
Percent of ownership interest held in unconsolidated affiliates	49.00%		49.00%
WAVE
Investments in and Advances to Affiliates [Line Items]
Percent of ownership interest held in unconsolidated affiliates	50.00%		50.00%
Investments in unconsolidated affiliates	$ 110,763,000		$ 110,763,000		111,905,000
Excess dividends received from investing activity					$ 1,085,000
Workhorse
Investments in and Advances to Affiliates [Line Items]
Percent of ownership interest held in unconsolidated affiliates	20.00%		20.00%
Serviacero Worthington
Investments in and Advances to Affiliates [Line Items]
Distributions from unconsolidated affiliates			$ 77,769,000