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Segment Information - Reconciliation (Details) - USD ($)
$ in Thousands
 1 Months Ended 6 Months Ended 9 Months Ended
May 31, 2023
Jun. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
May 17, 2023
Segment Reporting Information [Line Items]          
Net income     $ 28,221 $ 871,987  
Income taxes     1,538 282  
Income before income taxes     29,759 872,269  
Depreciation and amortization     37,500 39,280  
Impairment of long-lived assets   $ 76,200 5,021 76,155  
Unrealized loss/(gain) on oil and gas derivative instruments (note 7)     11,362 (516,668)  
Realized and unrealized mark-to-market losses/(gains) on investment in listed equity securities (note 8)     62,308 (346,497)  
Other non-operating income, net     (9,823) (11,267)  
Interest income     (34,827) (4,013)  
Interest expense     1,107 15,589  
Gains on derivative instruments, net     (9,315) (73,330)  
Other financial items, net     1,057 3,243  
Net losses/(income) from equity method investments (note 16)     1,279 (12,996)  
Net (income)/loss from discontinued operations (note 11)     (293) 79,111  
Adjusted EBITDA     241,522 275,572  
Gandria          
Segment Reporting Information [Line Items]          
Impairment of long-lived assets $ 5,000        
Gandria          
Segment Reporting Information [Line Items]          
Consideration received 15,200        
Deposit received from sales of long-lived assets 2,300        
Held for Sale | Gandria          
Segment Reporting Information [Line Items]          
Consideration received         $ 15,200
Deposit received from sales of long-lived assets $ 2,300        
Oil and gas derivative          
Segment Reporting Information [Line Items]          
Unrealized loss/(gain) on oil and gas derivative instruments (note 7)     $ 157,749 $ (361,972)