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LEASES - Narrative (Details)
12 Months Ended
Sep. 30, 2021
USD ($)
option
Sep. 30, 2019
USD ($)
Sep. 30, 2020
USD ($)
Oct. 01, 2019
USD ($)
Lessee, Lease, Description [Line Items]        
ROU assets $ 144,598,000   $ 154,349,000  
Lease liabilities 149,196,000   160,260,000  
Impairment charge, operating lease 1,968,000      
Impairment charge, leasehold improvements 671,000      
Rent expense   $ 34,816,000    
Long-term debt 1,045,683,000   1,046,964,000  
Finance Lease - Real Estate        
Lessee, Lease, Description [Line Items]        
Long-term debt $ 14,590,000   $ 17,188,000  
Troy, Ohio | Finance Lease - Real Estate        
Lessee, Lease, Description [Line Items]        
Long-term debt, percentage bearing fixed interest, percentage rate 5.00%      
Finance lease, buyout amount $ 1      
Ocala, Florida        
Lessee, Lease, Description [Line Items]        
Finance lease, buyout amount $ 1      
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      
Finance lease, renewal term 5 years      
Cumulative Effect, Period of Adoption, Adjustment        
Lessee, Lease, Description [Line Items]        
ROU assets       $ 163,552,000
Lease liabilities       $ 163,676,000