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Reportable Segment - Assets by Segment (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
 [1]
Jun. 30, 2025
Segment Reporting [Line Items]      
Total assets $ 4,235,180 $ 3,939,257 $ 3,166,376
Operating Segments      
Segment Reporting [Line Items]      
Total assets 3,998,462   3,040,706
Operating Segments | Upstream/Midstream      
Segment Reporting [Line Items]      
Total assets 2,742,960   2,063,723
Operating Segments | BKV-BPP Power, LLC      
Segment Reporting [Line Items]      
Total assets 1,255,502   976,983
Segment reporting, reconciling item, corporate nonsegment      
Segment Reporting [Line Items]      
Total assets $ 236,718   $ 125,670
[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.