Leases - Weighted-Average Remaining Lease Term and Discount Rate Schedule (Details)	Sep. 30, 2021	Sep. 30, 2020
Weighted-average remaining lease term (years):
Finance leases	1 year 18 days	1 year 7 months 20 days
Operating leases	14 years 4 months 20 days	15 years 1 month 24 days
Weighted-average discount rate:
Finance leases	2.83%	4.84%
Operating leases	5.89%	5.89%