Postretirement Benefits - Components of Net Postretirement Expense (Detail) - Postretirement Benefits - USD ($) $ in Thousands	12 Months Ended
May 31, 2026	May 31, 2025	May 31, 2024
Domestic
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	$ 49	$ 83	$ 87
Net actuarial losses (gains)	34	(25)	(15)
Curtailment/settlement losses	617
Net Pension Cost	700	58	72
Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	936	1,672	2,259
Interest cost	1,089	1,251	1,550
Net actuarial losses (gains)	(1,024)	(551)	(49)
Net Pension Cost	$ 1,001	$ 2,372	$ 3,760

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of net periodic benefit cost (credit) for defined benefit plan.

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Amount of gain (loss) recognized in net periodic benefit (cost) credit from settlement and curtailment.

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Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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