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Significant Components of Deferred Income Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | May 31, 2024 | May 31, 2023
--- | --- | ---
Deferred income tax assets related to: |  |
Inventories | $ 17,772 | $ 18,811
Accrued compensation and benefits | 17,649 | 18,331
Accrued other expenses | 19,058 | 21,037
Deferred income and other long-term liabilities | 31,204 | 30,239
Credit, net operating, interest and capital loss carryforwards | 87,590 | 75,366
Net unrealized loss on securities |  | 3,373
Research and development | 33,076 | 17,360
Pension and other postretirement benefits |  | 11,813
Total Deferred Income Tax Assets | 206,349 | 196,330
Less: valuation allowances | (30,021) | (30,033)
Net Deferred Income Tax Assets | 176,328 | 166,297
Deferred income tax (liabilities) related to: |  |
Depreciation | (132,007) | (123,421)
Amortization of intangibles | (125,553) | (116,763)
Unremitted foreign earnings | (4,055) | (990)
Net unrealized gain on securities | (1,305) |
Pension and other postretirement benefits | (1,108) |
Total Deferred Income Tax (Liabilities) | (264,028) | (241,174)
Deferred Income Tax Assets (Liabilities), Net | $ (87,700) | $ (74,877)

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