LEASES - Narrative (Details)	6 Months Ended
	Mar. 31, 2022 USD ($) option	Sep. 30, 2021 USD ($)
Lessee, Lease, Description [Line Items]
Long-term debt	$ 1,966,835,000	$ 1,045,683,000
Finance Lease Obligation
Lessee, Lease, Description [Line Items]
Long-term debt	13,757,000	$ 14,590,000
Troy, Ohio
Lessee, Lease, Description [Line Items]
Lessee, finance lease buyout amount	$ 1
Ocala, Florida
Lessee, Lease, Description [Line Items]
Number of option to extend | option	2
Lease renewal term	5 years