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Derivative Activities - Derivative Volumes Hedged and Average Hedge Prices (Parenthetical) (Detail) - Natural Gas - Purchased Put | Sep. 30, 2016 $ / MMBTU
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2016 |
Derivative [Line Items] |
Weighted average deferred premium | 0.34
2017 |
Derivative [Line Items] |
Weighted average deferred premium | 0.32

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- Definition Deferred put option premium. + References No definition available. + Details
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- Details
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- Details
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- Details
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