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v3.25.3

EMPLOYEE BENEFIT PLANS - Narrative (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 30, 2025 USD ($) plan | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Jan. 16, 2025 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Liability for net actuarial loss outstanding | $ (109,864) | $ (6,524) |  |
Percentage of employer's contribution under 401(k)/ thrift plan matching the first 5 percent of participant's compensation subject to certain limitations | 100.00% |  |  |
Percentage of participant's compensation eligible for employer's matching contribution | 5.00% |  |  |
Annual expense incurred for defined contribution plan | $ 23,600 | 26,900 | $ 25,800 |
KCA Deutag |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Annual expense incurred for defined contribution plan | 10,000 |  |  |
United States |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Liability for net actuarial loss outstanding | (1,600) | (3,600) |  |
Accumulated other comprehensive income (loss) | (4,700) | (7,600) |  |
Employer contribution | 0 | 6,000 | 5,000 |
Net pension liability | 1,577 | 3,633 |  |
Benefit obligation | 50,127 | 57,154 | 54,646 |
Fair value of pension plan assets | 48,550 | 53,521 | $ 43,780 |
Foreign Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Accumulated other comprehensive income (loss) | 8,100 |  |  |
Employer contribution | 1,342 |  |  |
Net pension liability | 99,457 |  |  | $ 99,300
Benefit obligation | 134,585 | 0 |  | 132,500
Fair value of pension plan assets | 35,128 | $ 0 |  | $ 33,200
Plan assets | 35,100 |  |  |
Annual expense incurred for defined contribution plan | $ 5,700 |  |  |
Germany Plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Number of pension plans | plan | 4 |  |  |
UK Plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Number of pension plans | plan | 2 |  |  |

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