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BUSINESS SEGMENTS AND GEOGRAPHIC INFORMATION - Schedule of Revenues from External Customers and Long-Lived Assets by Country (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Segment Reporting Information [Line Items] |  |
Operating revenues | $ 677,302 | $ 677,147
United States |  |
Segment Reporting Information [Line Items] |  |
Operating revenues | 628,680 | 621,617
Argentina |  |
Segment Reporting Information [Line Items] |  |
Operating revenues | 34,660 | 35,876
Bahrain |  |
Segment Reporting Information [Line Items] |  |
Operating revenues | 4,848 | 4,497
Australia |  |
Segment Reporting Information [Line Items] |  |
Operating revenues | 4,757 | 4,312
Saudi Arabia |  |
Segment Reporting Information [Line Items] |  |
Operating revenues | 3,231 | 0
Colombia |  |
Segment Reporting Information [Line Items] |  |
Operating revenues | 0 | 7,703
United Arab Emirates |  |
Segment Reporting Information [Line Items] |  |
Operating revenues | 0 | 2,365
Other foreign |  |
Segment Reporting Information [Line Items] |  |
Operating revenues | $ 1,126 | $ 777

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