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Asset Retirement Obligations - Reconciliation of Beginning and Ending Aggregate Carrying Amounts of Asset Retirement Obligations (Details) - USD ($) $ in Thousands			3 Months Ended	12 Months Ended
	Nov. 02, 2018	Nov. 01, 2018	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Asset Retirement Obligation, Roll Forward Analysis
Beginning balance				$ 60,064	$ 77,544	$ 106,481
Liability incurred upon acquiring and drilling wells	$ 6,400			2,771	7,079	1,336
Revisions in estimated cash flows				12,208	870	(28,565)
Liability settled or disposed in current period			$ (5,400)	(5,379)	(31,967)	(11,308)
Accretion				5,352	6,538	9,600
Ending balance				75,016	60,064	77,544
Less: current portion				22,119	25,393	41,017
Asset retirement obligations, net of current				$ 52,897	34,671	$ 36,527
Central Basin Platform | Disposal Group, Not Discontinued Operations
Asset Retirement Obligation, Roll Forward Analysis
Liability settled or disposed in current period		$ (26,900)			$ (26,900)

X

- Definition

The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 1
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- Definition

Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability.

+ References

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Current portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

+ References

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-SubTopic 20
-Section 50
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Amount of asset retirement obligations incurred during the period.

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Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset.

+ References

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Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation.

+ References

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Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

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