Changes Recognized in Other Comprehensive Income, Postretirement Benefits (Detail) - Postretirement Benefits - USD ($) $ in Thousands	12 Months Ended
	May 31, 2022	May 31, 2021
Domestic
Changes in plan assets and benefit obligations recognized in other comprehensive income:
Net (gain) loss arising during the year	$ (123)	$ 152
Amounts recognized as a component of net periodic benefit cost:
Amortization or curtailment recognition of prior service credit	160	167
Amortization or settlement recognition of net gain (loss)	(60)	(41)
Total recognized in other comprehensive loss (income)	(23)	278
Non-U.S. Plans
Changes in plan assets and benefit obligations recognized in other comprehensive income:
Net (gain) loss arising during the year	(9,240)	(6,415)
Effect of exchange rates on amounts included in AOCI	(418)	1,574
Amounts recognized as a component of net periodic benefit cost:
Amortization or settlement recognition of net gain (loss)	(121)	(590)
Total recognized in other comprehensive loss (income)	$ (9,779)	$ (5,431)