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Derivatives Hedges and Financial Instruments - Additional Information (Detail) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2022 USD ($) MMBTU | Sep. 30, 2021 USD ($) | Dec. 31, 2021 USD ($) MMBTU
Derivative Instruments And Hedging Activities Disclosures [Line Items] |  |  |
Gain (loss) on sale of natural gas |  | $ 2,700 |
Financial instruments with fair values | $ 0 |  | $ 0
Natural Gas Purchase Commitments [Member] |  |  |
Derivative Instruments And Hedging Activities Disclosures [Line Items] |  |  |
Natural gas purchase commitments volume | MMBTU | 13,000,000.0 |  |
Realized gain on sale of natural gas |  | $ 1,500 |
Natural Gas Purchase Commitments [Member] | Level 2 [Member] |  |  |
Derivative Instruments And Hedging Activities Disclosures [Line Items] |  |  |
Natural gas purchase commitments volume | MMBTU | 0 |  | 0

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- Definition Financial instruments with fair values. + References No definition available. + Details
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- Definition The amount of gains and losses (realized and unrealized) recognized in earnings during the period on natural gas forward contracts measured at fair value. + References No definition available. + Details
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- Details
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- Details
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