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FAIR VALUE MEASUREMENT OF FINANCIAL INSTRUMENTS - Narrative (Details) - USD ($)
$ in Thousands, shares in Millions
 1 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2024
Oct. 31, 2022
Apr. 30, 2022
Sep. 30, 2021
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Investments lockup period expiration (in years) 3 years              
Gain (loss) resulting from the change in the fair value of investments           $ 5,600   $ 3,500
Depository beneficial interests   0.50%            
Convertible notes         $ 9,400   $ 9,400  
Convertible notes (in shares)         0.5   0.5  
Investment shares         1.0   1.0  
Unrealized gain on investments         $ (800) 1,900 $ 1,300 3,700
Debt Securities | Level 3                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Included in earnings         0 0 10,162 (5)
Included in other comprehensive income (loss)         $ (280) $ 0 $ 383 $ 0
Galileo Technologies | Convertible Debt                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Interest rate (as a percent)     5.00%          
ADNOC Drilling                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Payments to acquire investments       $ 100,000        
Investment balance (in shares)       159.7        
Investments lockup period (in years)       3 years        
Sale of equity securities, number of shares sold             159.7  
Increase (decrease) in equity securities, FV-NI             $ 193,300  
Gain (loss) resulting from the change in the fair value of investments             (12,400)  
Fair value of the investment             8,400  
Equity securities, FV-NI, transaction fee associated with sale of securities             $ 4,000  
ADNOC Drilling | ADNOC Drilling                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Ownership percentage (as a percent)       1.00%        
Tamboran Resources Limited                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Payments to acquire investments   $ 14,100            
Investment shares acquired (in shares)   106.0            
Tamboran Resources Limited | Tamboran Resources Limited                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Ownership percentage (as a percent)         6.10%   6.10%  
Galileo Technologies                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Payments to acquire investments     $ 33,000          
Fair Value, Nonrecurring                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Debt security investments $ 300       $ 200   $ 200  
Investment in Tamboran 4,300       5,800   5,800  
Fair Value, Nonrecurring | Geothermal Investments                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Investment in Tamboran 25,800       $ 14,100   $ 14,100  
Equity securities, fair value 100              
Equity securities $ 25,700