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Derivative Activities - Derivative Volumes Hedged and Average Hedge Prices (Detail) - Natural Gas
$ in Thousands
Sep. 30, 2025
USD ($)
MmbtuPerDay
$ / MMBTU
October - December 2025 Commodity Contract | Swaps  
Derivative [Line Items]  
Volume Hedged | MmbtuPerDay 400,000
Weighted Average Hedge Price, Swap 4.12
Fair Market Value | $ $ 28,529
October - December 2025 Commodity Contract | Three Way Collars  
Derivative [Line Items]  
Volume Hedged | MmbtuPerDay 180,000
Weighted Average Hedge Price, Sold Put 2.95
Weighted average price of hedge, Floor 4
Weighted average price of hedge, Ceiling 5.12
Fair Market Value | $ $ 10,917
2026 Commodity Contract | Swaps  
Derivative [Line Items]  
Volume Hedged | MmbtuPerDay 280,000
Weighted Average Hedge Price, Swap 4.05
Fair Market Value | $ $ 14,844
2026 Commodity Contract | Three Way Collars  
Derivative [Line Items]  
Volume Hedged | MmbtuPerDay 125,000
Weighted Average Hedge Price, Sold Put 3
Weighted average price of hedge, Floor 4
Weighted average price of hedge, Ceiling 5.7
Fair Market Value | $ $ 12,295
2027 Commodity Contract | Swaps  
Derivative [Line Items]  
Volume Hedged | MmbtuPerDay 200,000
Weighted Average Hedge Price, Swap 4.05
Fair Market Value | $ $ 6,728