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Pension Plan - Additional Information (Detail) - USD ($)
3 Months Ended
Feb. 28, 2022
May 31, 2021
Feb. 28, 2021
Defined Benefit Plan Disclosure [Line Items]      
Employees covered under noncontributory Pension Plan   13.00%  
Compensation period preceding retirement and termination   5 years  
Period used for calculating Pension Plan liability   25 years  
Unfunded pension liability   $ 6,299,000 $ 6,299,000
Minimum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Expected contributions   1,500,000  
Maximum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Expected contributions   $ 3,000,000.0  
Scenario Forecast [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Minimum required contribution to the plan $ 0