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EQUITY - Performance-Based Award Activity (Details) - Performance-Based Units - $ / shares
3 Months Ended 12 Months Ended
Sep. 30, 2023
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2021
No. of Units        
Beginning Balance (in shares)   113,256    
Granted (in shares) 200,000 707,665    
Vested (in shares)   (250,586)    
Forfeited (in shares)   (25,545)    
Ending Balance (in shares) 544,790 544,790 113,256  
Wtd. Avg. Grant Date Fair Value per Unit        
Beginning Balance (USD per share)   $ 130.94    
Granted (USD per share)   66.00 $ 132.74 $ 236.53
Vested (USD per share)   69.16    
Forfeited (USD per share)   91.56    
Ending Balance (USD per share) $ 76.85 $ 76.85 $ 130.94  
Shares vested (as a percentage of shares granted)   102.00%