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PROPERTY, PLANT AND EQUIPMENT - Narrative (Details) ft² in Thousands, $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Nov. 30, 2022 rig | Jun. 30, 2025 USD ($) ft² rig | Jun. 30, 2024 USD ($) | Jun. 30, 2025 USD ($) ft² rig | Jun. 30, 2024 USD ($) | Sep. 30, 2024 USD ($)
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Depreciation |  | $ 160,800 | $ 96,200 | $ 405,100 | $ 291,500 |
Abandonments included in depreciation |  | 100 | 100 | 2,000 | 3,200 |
Rigs damaged by fire | rig | 1 |  |  |  |  |
Gain on involuntary conversion |  |  |  |  | 5,500 |
Assets held-for-sale |  | 14,238 |  | 14,238 |  | $ 0
Asset impairment charges |  | 173,258 | 0 | 175,102 | 0 |
Gain on reimbursement of drilling equipment |  | $ 6,773 | $ 9,732 | $ 26,149 | $ 24,687 |
Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Area of real estate property | ft² |  | 371 |  | 371 |  |
Assets held-for-sale |  | $ 11,000 |  | $ 11,000 |  |
Number of rigs, held-for -sale | rig |  | 16 |  | 16 |  |
Net book value of assets held-for-sale |  | $ 3,200 |  | $ 3,200 |  |
Disposal group, including discontinued operation, property, plant and equipment |  | 14,200 |  | 14,200 |  |
Drilling services equipment |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Net book value of assets held-for-sale |  | 1,700 |  | 1,700 |  |
Property, plant, and equipment, salvage value |  | $ 200 |  | 200 |  |
Drilling services equipment | North America Solutions |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Asset impairment charges |  |  |  | $ 1,500 |  |

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