Commodity Derivative Positions (Details) $ in Thousands	9 Months Ended
Sep. 30, 2019 USD ($) bbl $ / bbl
Settlement Agreement [Member]
Derivative Instruments Related to Oil and Gas Production [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	$ 368
Crude Oil \| Fourth Quarter 2019 [Member]
Derivative Instruments Related to Oil and Gas Production [Line Items]
Derivative, Type of Instrument	Swaps-WTI
Derivative, Nonmonetary Notional Amount \| bbl	11,398
Derivative, Swap Type, Average Fixed Price \| $ / bbl	55.97
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	$ 2,804
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	$ 0
Crude Oil \| First Quarter 2020 [Member]
Derivative Instruments Related to Oil and Gas Production [Line Items]
Derivative, Type of Instrument	Swaps-WTI
Derivative, Nonmonetary Notional Amount \| bbl	9,000
Derivative, Swap Type, Average Fixed Price \| $ / bbl	55.19
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	$ 2,942
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	$ 0
Crude Oil \| Second Quarter 2020 [Member]
Derivative Instruments Related to Oil and Gas Production [Line Items]
Derivative, Type of Instrument	Swaps-WTI
Derivative, Nonmonetary Notional Amount \| bbl	7,000
Derivative, Swap Type, Average Fixed Price \| $ / bbl	54.94
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	$ 3,220
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	$ 0
Crude Oil \| Third Quarter 2020 [Member]
Derivative Instruments Related to Oil and Gas Production [Line Items]
Derivative, Type of Instrument	Swaps-WTI
Derivative, Nonmonetary Notional Amount \| bbl	7,000
Derivative, Swap Type, Average Fixed Price \| $ / bbl	54.94
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	$ 3,878
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	$ 0
Crude Oil \| Fourth Quarter 2020 [Member]
Derivative Instruments Related to Oil and Gas Production [Line Items]
Derivative, Type of Instrument	Swaps-WTI
Derivative, Nonmonetary Notional Amount \| bbl	7,000
Derivative, Swap Type, Average Fixed Price \| $ / bbl	54.94
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	$ 4,203
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	$ 0
Louisiana Light Sweet [Member] \| Fourth Quarter 2019 [Member]
Derivative Instruments Related to Oil and Gas Production [Line Items]
Derivative, Type of Instrument	Swaps-LLS
Derivative, Nonmonetary Notional Amount \| bbl	5,000
Derivative, Swap Type, Average Fixed Price \| $ / bbl	59.17
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	$ 995
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	$ 0
MEH [Member] \| Fourth Quarter 2019 [Member]
Derivative Instruments Related to Oil and Gas Production [Line Items]
Derivative, Type of Instrument	Swaps-MEH
Derivative, Nonmonetary Notional Amount \| bbl	1,000
Derivative, Swap Type, Average Fixed Price \| $ / bbl	64.00
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	$ 131
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	$ 0
MEH [Member] \| First Quarter 2020 [Member]
Derivative Instruments Related to Oil and Gas Production [Line Items]
Derivative, Type of Instrument	Swaps-MEH
Derivative, Nonmonetary Notional Amount \| bbl	2,000
Derivative, Swap Type, Average Fixed Price \| $ / bbl	61.03
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	$ 114
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	$ 0
MEH [Member] \| Second Quarter 2020 [Member]
Derivative Instruments Related to Oil and Gas Production [Line Items]
Derivative, Type of Instrument	Swaps-MEH
Derivative, Nonmonetary Notional Amount \| bbl	2,000
Derivative, Swap Type, Average Fixed Price \| $ / bbl	61.03
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	$ 90
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	$ 0
MEH [Member] \| Third Quarter 2020 [Member]
Derivative Instruments Related to Oil and Gas Production [Line Items]
Derivative, Type of Instrument	Swaps-MEH
Derivative, Nonmonetary Notional Amount \| bbl	2,000
Derivative, Swap Type, Average Fixed Price \| $ / bbl	61.03
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	$ 100
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	$ 0
MEH [Member] \| Fourth Quarter 2020 [Member]
Derivative Instruments Related to Oil and Gas Production [Line Items]
Derivative, Type of Instrument	Swaps-MEH
Derivative, Nonmonetary Notional Amount \| bbl	2,000
Derivative, Swap Type, Average Fixed Price \| $ / bbl	61.03
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	$ 96
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	$ 0

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Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset.

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Nominal number of units used to calculate payment on derivative.

+ References

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Average fixed price related to the group of price risk swap derivatives.

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Description of the type of derivative instrument, such as a swap, forward, and option. Excludes the underlying risk of the instrument.

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