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BUSINESS SEGMENTS AND GEOGRAPHIC INFORMATION - Schedule of Reconciliation of Segment Assets to Consolidated Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Sep. 30, 2024
Segment Reporting Information [Line Items]
Assets	$ 5,816,621	$ 5,781,898
Operating Segments
Segment Reporting Information [Line Items]
Assets	4,142,078	4,142,239
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Assets	1,674,543	1,639,659
North America Solutions | Operating Segments
Segment Reporting Information [Line Items]
Assets	3,102,356	3,225,410
International Solutions | Operating Segments
Segment Reporting Information [Line Items]
Assets	806,521	685,833
Offshore Gulf of Mexico | Operating Segments
Segment Reporting Information [Line Items]
Assets	69,542	73,119
Other | Operating Segments
Segment Reporting Information [Line Items]
Assets	$ 163,659	$ 157,877

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Amount of asset recognized for present right to economic benefit.

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