BUSINESS SEGMENTS AND GEOGRAPHIC INFORMATION - Summary of Financial Information of Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenues	$ 719,637	$ 409,782
Segment operating income (loss)	144,223	(42,611)
Intersegment
Segment Reporting Information [Line Items]
Revenues	(16,402)	(13,648)
Segment operating income (loss)	2,310	(1,282)
Operating Segments
Segment Reporting Information [Line Items]
Revenues	719,637	409,782
Segment operating income (loss)	160,604	(12,731)
North America Solutions
Segment Reporting Information [Line Items]
Revenues	627,163	341,034
North America Solutions | Intersegment
Segment Reporting Information [Line Items]
Revenues	0	0
North America Solutions | Operating Segments
Segment Reporting Information [Line Items]
Revenues	627,163	341,034
Segment operating income (loss)	145,297	(28,893)
Offshore Gulf of Mexico
Segment Reporting Information [Line Items]
Revenues	35,164	29,314
Offshore Gulf of Mexico | Intersegment
Segment Reporting Information [Line Items]
Revenues	0	0
Offshore Gulf of Mexico | Operating Segments
Segment Reporting Information [Line Items]
Revenues	35,164	29,314
Segment operating income (loss)	6,746	5,466
International Solutions Segment
Segment Reporting Information [Line Items]
Revenues	54,801	37,159
International Solutions Segment | Intersegment
Segment Reporting Information [Line Items]
Revenues	0	0
International Solutions Segment | Operating Segments
Segment Reporting Information [Line Items]
Revenues	54,801	37,159
Segment operating income (loss)	1,574	8,049
Other
Segment Reporting Information [Line Items]
Revenues	2,509	2,275
Other | Intersegment
Segment Reporting Information [Line Items]
Revenues	(16,402)	(13,648)
Other | Operating Segments
Segment Reporting Information [Line Items]
Revenues	18,911	15,923
Segment operating income (loss)	$ 4,677	$ 3,929