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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 ($)
shares
Dec. 31, 2024
USD ($)
executive_officer
geographical_area
shares
Dec. 31, 2023
USD ($)
Feb. 05, 2025
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Summary Of Significant Accounting Policies [Line Items]            
Restricted cash and cash equivalents   $ 1,300,000 $ 65,100   $ 1,300,000 $ 59,100
Additional cash and cash equivalents restricted at the election of management for potential insurance claims   73,200     68,900  
Convertible notes   $ 9,400        
Convertible notes (in shares) | shares   0.5        
Number of executive officers serving on related party board | executive_officer   1        
Receivables   $ 426,933     418,604  
Contract liability   37,741     29,052  
Drilling services   674,613 674,565      
Underwriting expense   3,900 3,500      
Casualty insurance premiums   10,500 9,100      
Premium revenues and expenses   16,600 15,200      
Stop-loss medical expenses   $ 5,200 4,100      
Cumulative inflation rate before a country is considered highly inflationary   100.00%        
Foreign currency losses   $ 900 $ 1,800      
Subsequent Event            
Summary Of Significant Accounting Policies [Line Items]            
Additional cash and cash equivalents restricted at the election of management for potential insurance claims       $ 1,200,000    
KCA Deutag Acquisition            
Summary Of Significant Accounting Policies [Line Items]            
Restricted cash and cash equivalents   $ 1,200,000     1,200,000  
International Locations | Geographic Concentration Risk | Operating Revenue            
Summary Of Significant Accounting Policies [Line Items]            
Concentration percentage   7.20% 8.20%      
Minimum            
Summary Of Significant Accounting Policies [Line Items]            
Number of geographical areas operating | geographical_area   1        
South America | International Locations | Geographic Concentration Risk | Operating Revenue | International Solutions            
Summary Of Significant Accounting Policies [Line Items]            
Concentration percentage   71.30% 78.50%      
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   $ 1,000     5,000  
Contract liability   3,400     $ 3,900  
Drilling services   4,800 $ 4,300      
Expected revenue   $ 35,000