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Risk Management and Derivative Instruments - Gross Fair Value of Derivative Instruments by Appropriate Balance Sheet (Detail) - USD ($) | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Derivative Instruments and Hedges, Assets [Abstract] |  |
Cash collateral received | $ 0 | $ 0
Cash collateral pledged | 0 | 0
Short-Term Derivative Instruments [Member] |  |
Derivative Instruments and Hedges, Assets [Abstract] |  |
Asset Derivatives, Gross fair value | 6,046,000 | 4,804,000
Asset Derivatives, Netting arrangements | (5,604,000) | (4,804,000)
Asset Derivatives, Net recorded fair value | 442,000 | 0
Liability Derivatives, Gross fair value | 50,471,000 | 57,948,000
Liability Derivatives, Netting arrangements | (5,604,000) | (4,804,000)
Liability Derivatives, Net recorded fair value | 44,867,000 | 53,144,000
Short-Term Derivative Instruments [Member] | Commodity derivatives [Member] |  |
Derivative Instruments and Hedges, Assets [Abstract] |  |
Asset Derivatives, Gross fair value | 5,604,000 | 4,804,000
Liability Derivatives, Gross fair value | 50,471,000 | 57,325,000
Short-Term Derivative Instruments [Member] | Interest Rate Swaps [Member] |  |
Derivative Instruments and Hedges, Assets [Abstract] |  |
Asset Derivatives, Gross fair value | 442,000 | 0
Liability Derivatives, Gross fair value | 0 | 623,000
Long-Term Derivative Instruments [Member] |  |
Derivative Instruments and Hedges, Assets [Abstract] |  |
Asset Derivatives, Gross fair value | 2,030,000 | 3,163,000
Asset Derivatives, Netting arrangements | (2,030,000) | (3,163,000)
Asset Derivatives, Net recorded fair value | 0 | 0
Liability Derivatives, Gross fair value | 7,714,000 | 12,827,000
Liability Derivatives, Netting arrangements | (2,030,000) | (3,163,000)
Liability Derivatives, Net recorded fair value | 5,684,000 | 9,664,000
Long-Term Derivative Instruments [Member] | Commodity derivatives [Member] |  |
Derivative Instruments and Hedges, Assets [Abstract] |  |
Asset Derivatives, Gross fair value | 2,030,000 | 3,163,000
Liability Derivatives, Gross fair value | 7,714,000 | 12,827,000
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

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 + Details
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