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GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Intangible Asset, Acquired, Finite-Lived [Line Items] |  |  |  |
Decrease in goodwill |  |  | $ 4,000 |
Goodwill impairment charges |  |  | 173,258 |
Amortization | $ 18,700 | $ 1,600 | 31,100 | $ 4,800
International Solutions |  |  |  |
Intangible Asset, Acquired, Finite-Lived [Line Items] |  |  |  |
Goodwill impairment charges |  |  | 128,400 |
Kenera Reporting Unit |  |  |  |
Intangible Asset, Acquired, Finite-Lived [Line Items] |  |  |  |
Goodwill impairment charges |  |  | $ 44,900 |
H&P Technologies |  |  |  |
Intangible Asset, Acquired, Finite-Lived [Line Items] |  |  |  |
Fair value in excess of carrying amount | 76.00% |  | 76.00% |
Offshore Solutions |  |  |  |
Intangible Asset, Acquired, Finite-Lived [Line Items] |  |  |  |
Fair value in excess of carrying amount | 20.00% |  | 20.00% |
KCA Deutag |  |  |  |
Intangible Asset, Acquired, Finite-Lived [Line Items] |  |  |  |
Business combination, provisional information, initial accounting incomplete, adjustment, intangibles | $ 2,000 |  |  |
Decrease in goodwill | $ 4,000 |  |  |

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