Risk Management and Derivative Instruments - Balance Sheet Presentation (Detail) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Derivative Instruments and Hedges, Assets [Abstract]
Cash collateral received	$ 0	$ 0
Cash collateral pledged	0	0
Net recorded fair value, Current assets		0
Net recorded fair value, Non-Current assets	0	0
Net recorded fair value, Current liabilities	12,996,000	20,884,000
Net recorded fair value, Non current liabilities	7,834,000
Short-Term Derivative Instruments [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Asset Derivatives, Gross fair value	9,745,000	6,257,000
Asset Derivatives, Netting arrangements	(9,745,000)	(6,257,000)
Liability Derivatives, Gross fair value	22,741,000	27,141,000
Liability Derivatives, Netting arrangements	(9,745,000)	(6,257,000)
Short-Term Derivative Instruments [Member] \| Commodity derivatives [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Asset Derivatives, Gross fair value	9,745,000	6,257,000
Liability Derivatives, Gross fair value	22,741,000	27,141,000
Short-Term Derivative Instruments [Member] \| Interest Rate Swaps [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Asset Derivatives, Gross fair value	0	0
Liability Derivatives, Gross fair value	0	0
Long-Term Derivative Instruments [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Asset Derivatives, Gross fair value	11,984,000
Asset Derivatives, Netting arrangements	(11,984,000)
Liability Derivatives, Gross fair value	19,818,000
Liability Derivatives, Netting arrangements	(11,984,000)
Long-Term Derivative Instruments [Member] \| Commodity derivatives [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Asset Derivatives, Gross fair value	11,984,000
Liability Derivatives, Gross fair value	19,818,000
Long-Term Derivative Instruments [Member] \| Interest Rate Swaps [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Asset Derivatives, Gross fair value	0	0
Liability Derivatives, Gross fair value	$ 0	$ 0

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and elected not to be offset.

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Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, and obligation to return cash collateral under master netting arrangements.

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Amount of obligation to return cash collateral under master netting arrangements that have not been offset against derivative assets.

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