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Discontinued Operations - Summary of Significant Non Cash Operating Items and Capital Expenditures of Discontinued Operations Included in Consolidated Statements of Cash Flows (Detail) - USD ($) $ in Thousands | 12 Months Ended
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May 31, 2025 | May 31, 2024 | May 31, 2023
Significant non-cash operating items: |  |  |  |  |
Impairment of long-lived assets |  | $ 50,813 | $ 32,975 | [1] | $ 484
Equity in income of unconsolidated affiliate, net of distributions |  | (8,769) | (5,722) |  | (79,870)
Net gain on sale of asset |  | 277 | 28,980 |  | (4,458)
Stock-based compensation |  | 16,186 | 16,688 |  | 19,178
Significant investing activities: |  |  |  |  |
Investment in property, plant and equipment |  | (50,580) | (47,421) |  | (38,683)
Acquisitions, net of cash acquired |  | $ (95,018) | (42,035) |  | (56,088)
Significant financing activities |  |  |  |  |
Net proceeds from short-term borrowings | [2] |  | 172,187 |  | (45,183)
Discontinued Operations |  |  |  |  |
Significant non-cash operating items: |  |  |  |  |
Depreciation and amortization |  |  | 32,043 |  | 66,826
Impairment of long-lived assets |  |  | 1,401 |  | 2,112
Equity in income of unconsolidated affiliate, net of distributions |  |  | (12,735) |  | 4,775
Net gain on sale of asset |  |  | (412) |  | (3,348)
Stock-based compensation |  |  | 3,533 |  | 4,612
Significant investing activities: |  |  |  |  |
Investment in property, plant and equipment |  |  | (33,457) |  | $ (46,577)
Acquisitions, net of cash acquired |  |  | (21,013) |  |
Significant financing activities |  |  |  |  |
Net proceeds from short-term borrowings |  |  | $ 172,187 |  |
[1] | Significant pre-tax impairment charges include $32,203 in the fourth quarter of fiscal 2024 due to the deconsolidation of our former SES operating segment.
[2] | Net proceeds in fiscal 2024 consisted of borrowings under short-term credit facilities assumed by Worthington Steel in conjunction with the Separation.

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