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Derivative Activities - Derivative Volumes Hedged and Average Hedge Prices (Parenthetical) (Detail) $ in Millions | 9 Months Ended
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Sep. 30, 2025 USD ($) MmbtuPerDay $ / MMBTU
Fair Value, Inputs, Level 3 |
Derivative [Line Items] |
Net derivative liability | $ | $ 2.8
2026 Commodity Contract | Call Swaptions |
Derivative [Line Items] |
Volume Hedged | MmbtuPerDay | 10,000
Weighted average price of hedge | $ / MMBTU | 4.12
Expiration of derivative non monetary notional amount | Nov. 30, 2025
2027 Commodity Contract | Call Swaptions |
Derivative [Line Items] |
Volume Hedged | MmbtuPerDay | 160,000
Weighted average price of hedge | $ / MMBTU | 4.05
Expiration of derivative non monetary notional amount | Dec. 31, 2025

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