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Derivative Activities - Derivative Volumes Hedged and Average Hedge Prices (Parenthetical) (Detail) - Call Swaptions | Dec. 31, 2019 MMBTU / d bbl / d $ / MMBTU $ / bbl
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2020 Commodity Contract | Natural Gas |
Derivative [Line Items] |
Volume Hedged | MMBTU / d | 140,000
Weighted average price of hedge | $ / MMBTU | 2.53
2021 Commodity Contract | Natural Gas |
Derivative [Line Items] |
Volume Hedged | MMBTU / d | 100,000
Weighted average price of hedge | $ / MMBTU | 2.69
2021 Commodity Contract | Crude Oil |
Derivative [Line Items] |
Volume Hedged | bbl / d | 3,000
Weighted average price of hedge | $ / bbl | 56.50

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