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GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Asses (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2023
Intangible Assets [Roll Forward]      
Beginning Balance $ 16,589 $ 20,720  
Amortization during the period $ (3,456) (4,131) $ (4,971)
Impairment Of Intangible Asset, Finite Lived, Statement Of Income Or Comprehensive Income, Extensible Enumeration, Not Disclosed Flag Write-offs and disposals during the period    
Write-offs and disposals during the period $ 631    
Ending Balance 12,502 16,589 20,720
Gross carrying amount 92,145 99,385  
Accumulated amortization (68,572) (71,725)  
Accumulated impairment (11,071) (11,071)  
Total anticipated intangible amortization 12,502 16,589 20,720
Trademark      
Intangible Assets [Roll Forward]      
Beginning Balance 6,422 7,477  
Amortization during the period (1,076) (1,055)  
Write-offs and disposals during the period 0    
Ending Balance 5,346 6,422 7,477
Gross carrying amount 13,774 13,774  
Accumulated amortization (8,428) (7,352)  
Accumulated impairment 0 0  
Total anticipated intangible amortization $ 5,346 6,422 7,477
Trademark | Minimum      
Intangible Assets [Roll Forward]      
Useful life 5 years    
Trademark | Maximum      
Intangible Assets [Roll Forward]      
Useful life 15 years    
Non-Compete      
Intangible Assets [Roll Forward]      
Beginning Balance $ 0 0  
Amortization during the period 0 0  
Write-offs and disposals during the period 0    
Ending Balance 0 0 0
Gross carrying amount 301 301  
Accumulated amortization (301) (301)  
Accumulated impairment 0 0  
Total anticipated intangible amortization 0 0 0
Customer Relationships      
Intangible Assets [Roll Forward]      
Beginning Balance 6,566 9,110  
Amortization during the period (1,824) (2,544)  
Write-offs and disposals during the period 631    
Ending Balance 4,111 6,566 9,110
Gross carrying amount 70,338 77,578  
Accumulated amortization (55,309) (60,094)  
Accumulated impairment (10,918) (10,918)  
Total anticipated intangible amortization $ 4,111 6,566 9,110
Customer Relationships | Minimum      
Intangible Assets [Roll Forward]      
Useful life 10 years    
Customer Relationships | Maximum      
Intangible Assets [Roll Forward]      
Useful life 30 years    
All Others      
Intangible Assets [Roll Forward]      
Beginning Balance $ 3,601 4,133  
Amortization during the period (556) (532)  
Write-offs and disposals during the period 0    
Ending Balance 3,045 3,601 4,133
Gross carrying amount 7,732 7,732  
Accumulated amortization (4,534) (3,978)  
Accumulated impairment (153) (153)  
Total anticipated intangible amortization $ 3,045 $ 3,601 $ 4,133
All Others | Minimum      
Intangible Assets [Roll Forward]      
Useful life 3 years    
All Others | Maximum      
Intangible Assets [Roll Forward]      
Useful life 20 years