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Other Current Assets - Schedule of Other Current Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Other Current Assets [Line Items]    
Prepaid expenses $ 2,795 $ 2,760
Investment in listed equity securities (note 8) 0 224,788
Other receivables 4,232 3,925
Other current assets 49,112 315,234
Commodity contract    
Other Current Assets [Line Items]    
Derivative asset 22,477 73,583
Receivable from TTF linked commodity swap derivatives 7,581 4,638
Interest rate swap    
Other Current Assets [Line Items]    
Derivative asset 4,319 0
Interest Receivable 2,280 1,923
Money market    
Other Current Assets [Line Items]    
Interest Receivable $ 5,428 $ 3,617