Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenues	$ 1,140,773	$ 805,697	$ 1,009,609
Pennsylvania
Disaggregation of Revenue [Line Items]
Revenues	67,668	40,809	62,313
Texas
Disaggregation of Revenue [Line Items]
Revenues	1,073,105	764,888	947,296
Natural gas, NGL, and oil sales
Disaggregation of Revenue [Line Items]
Revenues	857,597	557,570	706,151
Natural gas, NGL, and oil sales \| Pennsylvania
Disaggregation of Revenue [Line Items]
Revenues	67,668	38,795	57,678
Natural gas, NGL, and oil sales \| Texas
Disaggregation of Revenue [Line Items]
Revenues	789,929	518,775	648,473
Natural gas
Disaggregation of Revenue [Line Items]
Revenues	675,078	385,456	509,846
Natural gas \| Pennsylvania
Disaggregation of Revenue [Line Items]
Revenues	67,668	38,795	57,678
Natural gas \| Texas
Disaggregation of Revenue [Line Items]
Revenues	607,410	346,661	452,168
NGLs
Disaggregation of Revenue [Line Items]
Revenues	173,059	165,508	187,860
NGLs \| Texas
Disaggregation of Revenue [Line Items]
Revenues	173,059	165,508	187,860
Oil
Disaggregation of Revenue [Line Items]
Revenues	9,460	6,606	8,445
Oil \| Texas
Disaggregation of Revenue [Line Items]
Revenues	9,460	6,606	8,445
BKV-BPP Power, LLC
Disaggregation of Revenue [Line Items]
Revenues	248,752	218,268	274,623
BKV-BPP Power, LLC \| Texas
Disaggregation of Revenue [Line Items]
Revenues	248,752	218,268	274,623
Merchant energy sales and other
Disaggregation of Revenue [Line Items]
Revenues	288,981	234,477	413,915
Merchant energy sales and other \| Texas
Disaggregation of Revenue [Line Items]
Revenues	288,981	234,477	413,915
Energy retail sales
Disaggregation of Revenue [Line Items]
Revenues	154,654	135,652	40,261
Energy retail sales \| Texas
Disaggregation of Revenue [Line Items]
Revenues	154,654	135,652	40,261
Solar revenue
Disaggregation of Revenue [Line Items]
Revenues	398	128
Solar revenue \| Texas
Disaggregation of Revenue [Line Items]
Revenues	398	128
Physical power purchased
Disaggregation of Revenue [Line Items]
Revenues	(195,281)	(151,989)	(179,553)
Physical power purchased \| Texas
Disaggregation of Revenue [Line Items]
Revenues	(195,281)	(151,989)	(179,553)
Marketing revenues
Disaggregation of Revenue [Line Items]
Revenues	12,304	10,668	8,710
Marketing revenues \| Texas
Disaggregation of Revenue [Line Items]
Revenues	12,304	10,668	8,710
Midstream revenues
Disaggregation of Revenue [Line Items]
Revenues	10,456	12,560	16,168
Midstream revenues \| Pennsylvania
Disaggregation of Revenue [Line Items]
Revenues		2,014	4,635
Midstream revenues \| Texas
Disaggregation of Revenue [Line Items]
Revenues	10,456	10,546	11,533
Other Revenue
Disaggregation of Revenue [Line Items]
Revenues	11,664	6,631	3,957
Other Revenue \| Texas
Disaggregation of Revenue [Line Items]
Revenues	$ 11,664	$ 6,631	$ 3,957