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DEBT - Additional information (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Sep. 30, 2023
DEBT          
Cash on hand $ 63,042   $ 63,042   $ 41,866
Revolving Credit Facility          
DEBT          
Line of credit facility, amount outstanding 500,000   500,000    
Line of credit facility, commitment fee amount     250,000    
Line of credit facility, remaining borrowing capacity 321,000   321,000    
Cash on hand 63,000   63,000    
Current maturities of long-term debt 20,000   20,000    
Letters of credit outstanding, amount $ 5,500   $ 5,500    
Debt weighted average interest rate 6.70% 6.05% 6.80% 5.57%  
Minimum | Revolving Credit Facility          
DEBT          
Facility fee     0.125%    
Maximum | Revolving Credit Facility          
DEBT          
Line of credit facility, remaining borrowing capacity $ 250,000   $ 250,000    
Facility fee     0.25%