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Pension Plan - Additional Information (Detail) - USD ($)
1 Months Ended 6 Months Ended
Feb. 28, 2023
Sep. 30, 2022
Aug. 31, 2022
Feb. 28, 2022
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     $ 5,729,000 $ 5,729,000
Subsequent Event [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Contribution to avoid a Pension Benefit Guaranty Corporation variable premium   $ 2,000,000.0    
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