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Natural Gas Properties & Other Property and Equipment Asset Retirement Obligation (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
 [2]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]          
Balance, beginning of period $ 201,774 $ 204,186 $ 233,339 $ 201,158  
Liabilities incurred 69 45 109 80  
Liabilities settled (374) (180) (822) (803)  
Revisions of estimates 0 0 (35,172) 0 [1]  
Accretion of discount 3,642 3,671 7,657 7,287  
Balance, end of period 205,111 207,722 205,111 207,722  
Less current portion (4,507) (3,391) (4,507) (3,391)  
Asset retirement obligations, long-term $ 200,604 $ 204,331 $ 200,604 $ 204,331 $ 230,372
[1] The financial information presented in this Quarterly Report on Form 10-Q has been retrospectively adjusted for the BKV-BPP Power Joint Venture Transaction, which was accounted for as a transaction between entities under common control, with prior periods recast as if the transaction had occurred at the beginning of the earliest period presented. See Note 2 - Acquisition for further information.
[2] The financial information presented in this Quarterly Report on Form 10-Q has been retrospectively adjusted for the BKV-BPP Power Joint Venture Transaction, which was accounted for as a transaction between entities under common control, with prior periods recast as if the transaction had occurred at the beginning of the earliest period presented. See Note 2 - Acquisition for further information.