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)