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REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Contract Assets and Liabilities (Details) - USD ($) $ in Thousands | 9 Months Ended |
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Jun. 30, 2025 | Sep. 30, 2024
Revenue from Contract with Customer [Abstract] |  |
Contract assets, net | $ 10,134 | $ 4,563
Change in Contract with Customer, Liability [Roll Forward] |  |
Contract liabilities beginning balance | 29,052 |
Acquisition of KCA Deutag | 22,982 |
Payment received/accrued and deferred | 59,914 |
Revenue recognized during the period | (58,859) |
Contract liabilities ending balance | $ 53,089 |

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