Investments in Unconsolidated Affiliates - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
Aug. 31, 2021	May 31, 2021
Investments in and Advances to Affiliates [Line Items]
Distributions from unconsolidated affiliates	$ 19,697
Distributions in excess of investment in unconsolidated affiliate	$ 259,132	$ 233,126
ArtiFlex
Investments in and Advances to Affiliates [Line Items]
Percent of ownership interest held in unconsolidated affiliates	50.00%
ClarkDietrich
Investments in and Advances to Affiliates [Line Items]
Percent of ownership interest held in unconsolidated affiliates	25.00%
Cabs
Investments in and Advances to Affiliates [Line Items]
Percent of ownership interest held in unconsolidated affiliates	20.00%
Serviacero Worthington
Investments in and Advances to Affiliates [Line Items]
Percent of ownership interest held in unconsolidated affiliates	50.00%
WAVE
Investments in and Advances to Affiliates [Line Items]
Percent of ownership interest held in unconsolidated affiliates	50.00%
Distributions in excess of investment in unconsolidated affiliate	$ 92,917

Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

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