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Employee Pension Plans - Other Changes in Plan Assets And Benefit Obligations Recognized in OCI (Detail) - USD ($)
$ in Thousands
12 Months Ended
May 31, 2022
May 31, 2021
Pension Benefit    
Defined Benefit Plan Disclosure [Line Items]    
Net (gain) loss $ (8,903) $ 7,097
Amortization of net (gain) loss 546 (775)
Settlement cost (1,357)  
Total recognized in other comprehensive (gain) loss (10,806) 7,872
Total recognized in net periodic benefit cost and other comprehensive income (10,704) $ (7,898)
Other Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Net (gain) loss (873)  
Total recognized in other comprehensive (gain) loss (873)  
Total recognized in net periodic benefit cost and other comprehensive income $ (787)