Employee Pension Plans - Other Changes in Plan Assets And Benefit Obligations Recognized in OCI (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2023	May 31, 2022
Pension Benefit
Defined Benefit Plan Disclosure [Line Items]
Net (gain) loss	$ 809	$ (8,903)
Amortization of net (gain) loss	(191)	(546)
Settlement cost	(4,774)	(1,357)
Total recognized in other comprehensive income	(4,156)	(10,806)
Total recognized in net periodic benefit cost and OCI	110	(10,704)
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Net (gain) loss	(281)	(873)
Amortization of net (gain) loss	(441)
Settlement cost	50
Total recognized in other comprehensive income	(672)	(873)
Total recognized in net periodic benefit cost and OCI	$ 536	$ (787)