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Leases - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended
Nov. 30, 2023
Nov. 30, 2022
Aug. 31, 2023
Lessor and Lessee, Lease, Description [Line Items]      
Accumulated depreciation $ 74.9   $ 68.0
Depreciation expense $ 7.8 $ 6.0  
Operating lease option to extend options to extend up to 8 years    
Leasing & Management Services      
Lessor and Lessee, Lease, Description [Line Items]      
Operating lease rental revenues $ 27.7 $ 19.6  
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration] Revenue from Contract with Customer, Excluding Assessed Tax Revenue from Contract with Customer, Excluding Assessed Tax  
Car Hire Utilization Arrangements      
Lessor and Lessee, Lease, Description [Line Items]      
Operating lease rental revenues $ 5.4 $ 4.8  
Minimum      
Lessor and Lessee, Lease, Description [Line Items]      
Sublease period 1 year    
Opreating lease remaining lease term 1 year    
Maximum      
Lessor and Lessee, Lease, Description [Line Items]      
Sublease period 13 years    
Opreating lease remaining lease term 75 years