SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, RELATED RISKS AND UNCERTAINTIES - Narrative (Details) $ in Thousands, shares in Millions	1 Months Ended	3 Months Ended
	Oct. 31, 2022 USD ($) shares	Dec. 31, 2023 USD ($) geographical_area	Dec. 31, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Restricted cash and cash equivalents		$ 65,100	$ 42,500	$ 59,100	$ 36,900
Additional cash and cash equivalents restricted at the election of management for potential insurance claims				58,400
Receivables		435,819		404,188
Contract liability		25,735		28,882
Underwriting expense		3,500	2,900
Casualty insurance premiums		9,100	10,000
Premium revenues and expenses		15,200	16,400
Stop-loss medical expenses		$ 4,100	2,800
Cumulative inflation rate before a country is considered highly inflationary		100.00%
Foreign currency losses		$ 1,800	200
Drilling services		674,565	$ 717,170
Other assets, net		31,959		32,061
Tamboran Resources Limited
Summary Of Significant Accounting Policies [Line Items]
Payments to acquire investments	$ 14,100
Investment shares acquired (in shares) | shares	106.0
Investee
Summary Of Significant Accounting Policies [Line Items]
Receivables		2,800		2,800
Contract liability		5,800		6,600
Expected revenue		32,200
Drilling services		4,300
Other assets, net		$ 8,000		8,000
International Locations | Geographic Concentration Risk | Operating Revenue
Summary Of Significant Accounting Policies [Line Items]
Concentration percentage		8.20%	7.70%
Minimum
Summary Of Significant Accounting Policies [Line Items]
Number of geographical areas operating | geographical_area		1
Argentina
Summary Of Significant Accounting Policies [Line Items]
Cash		$ 6,900
South America | International Locations | Geographic Concentration Risk | Operating Revenue | International Solutions
Summary Of Significant Accounting Policies [Line Items]
Concentration percentage		78.50%	90.50%
Acquisition of Drilling Technologies Companies
Summary Of Significant Accounting Policies [Line Items]
Restricted cash and cash equivalents				$ 700