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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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