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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Commodity derivative contracts	$ 114	$ 5,286
Recurring Measurement Basis
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total Assets	114	5,286
Netting, assets	0	0
Recurring Measurement Basis | Commodity derivative contracts
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Netting, assets	0	0
Assets at Fair Value	114	5,286
Recurring Measurement Basis | Level 1
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total Assets	0	0
Recurring Measurement Basis | Level 1 | Commodity derivative contracts
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Commodity derivative contracts	0	0
Recurring Measurement Basis | Level 2
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total Assets	114	5,286
Recurring Measurement Basis | Level 2 | Commodity derivative contracts
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Commodity derivative contracts	114	5,286
Recurring Measurement Basis | Level 3
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total Assets	0	0
Recurring Measurement Basis | Level 3 | Commodity derivative contracts
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Commodity derivative contracts	$ 0	$ 0

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- Definition

Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]

+ References

No definition available.

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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-Name Accounting Standards Codification
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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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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 elected not to be offset. Excludes assets not subject to a master netting arrangement.

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