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Leases - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Leases [Abstract]        
Weighted average remaining lease term (years) 22 years   22 years  
Operating lease expense $ 8.2 $ 6.0 $ 22.5 $ 17.6
Operating lease renewal term 25 years   25 years  
Weighted average discount rate 6.40%   6.40%