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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 | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 30, 2022 | Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025 | Sep. 30, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Investment shares |  | 1.0 |  | 1.0 |  |
Unrealized gain (loss) on investments |  | $ (14,300) | $ (800) | $ 6,700 | $ 1,300 |
Equity Securities Without Readily Determinable Fair Value | Level 3 |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Loss on investment |  | 0 | (624) | 4,228 | (15,119) |
Disposals |  | 0 | $ 27,117 | 0 | 27,117 |
ADNOC Drilling |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Investment balance (in shares) |  |  |  |  |  | 159.7
Increase (decrease) in equity securities, FV-NI |  |  |  |  | 193,300 |
Loss resulting from the change in the fair value of investments |  |  |  |  | $ 12,400 |
Tamboran Resources Limited |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Equity securities |  | 32,663 |  | 32,663 |  | $ 25,976
Tamboran Resources Limited | Level 3 |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Equity securities |  | $ 0 |  | $ 0 |  | 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) |  | 3.60% |  | 3.60% |  |
Galileo Technologies |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Payments to acquire investments | $ 33,000 |  |  |  |  |
Notes Receivable | Debt Securities | Level 3 |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Loss on investment |  |  |  |  |  | 29,600
Fair Value, Nonrecurring |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Equity securities |  | $ 9,600 |  | $ 9,600 |  | 6,700
Debt security investments |  |  |  |  |  | 200
Fair Value, Nonrecurring | Geothermal Investments |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Equity securities |  | $ 9,100 |  | $ 9,100 |  | $ 14,100

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