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Natural Gas Properties & Other Property and Equipment - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Sep. 30, 2025
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Property, Plant, and Equipment [Abstract]            
Accumulated depreciation, depletion, amortization, and impairment $ 895,100     $ 895,100   $ 825,700
Depreciation, depletion, amortization, and accretion 35,900   $ 30,700 69,400 $ 62,500  
Midstream assets, accumulated depreciation, depletion, amortization, and impairment 27,000     27,000   $ 23,800
Midstream assets, depreciation, depletion, amortization, and accretion 1,600   1,600 3,300 3,200  
Depreciation 11,200   11,100 24,400 22,400  
Proceeds from sales of assets 300   200 473 1,258 [1]  
Gain (loss) on sale of properties 300   $ 100 400 1,200  
Impairment of asset held for sale 3,500     $ 3,516 2,446 [1]  
Proceeds from sale of other property, plant, and equipment $ 2,600       $ 5,500  
Proceeds from sale of buildings   $ 5,500        
[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.