Leases - Weighted Average Lease Terms and Discount Rates (Details)	Sep. 30, 2023	Sep. 30, 2022
Weighted-average remaining lease term
Operating leases	15 years 1 month 6 days	14 years 6 months
Finance leases	2 years 4 months 24 days	2 years 1 month 6 days
Weighted-average discount rate
Operating leases (in percent)	6.66%	5.94%
Finance leases (in percent)	4.27%	4.45%