LEASES - Narrative (Details)	12 Months Ended
	Sep. 30, 2020 USD ($) option	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Oct. 01, 2019 USD ($)
Lessee, Lease, Description [Line Items]
ROU assets	$ 161,627,000
Lease liabilities	167,902,000
Impairment charge, operating lease	1,968,000
Impairment charge, leasehold improvements	671,000
Rent expense		$ 37,068,000	$ 35,726,000
Accumulated depreciation	2,383,000
Long-term debt	1,046,964,000	1,104,274,000
Finance lease, net		6,546,000
Depreciation expense		3,967,000	$ 3,514,000
Finance Lease - Real Estate
Lessee, Lease, Description [Line Items]
Long-term debt	$ 17,188,000
Finance Lease - Real Estate
Lessee, Lease, Description [Line Items]
Long-term debt		$ 4,333,000
Troy, Ohio | Finance Lease - Real Estate
Lessee, Lease, Description [Line Items]
Long-term debt, percentage bearing fixed interest, percentage rate	5.00%
Ocala, Florida | Finance Lease - Real Estate
Lessee, Lease, Description [Line Items]
Long-term debt, percentage bearing fixed interest, percentage rate	5.60%
Number of option to extend | option	2
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member
Cumulative Effect, Period of Adoption, Adjustment
Lessee, Lease, Description [Line Items]
ROU assets				$ 163,552,000
Lease liabilities				$ 163,676,000