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Impairment (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Dec. 31, 2018	Dec. 31, 2017
Successor
Schedule of Impaired Long-Lived Assets Held and Used and Intangible Assets [Line Items]
Full cost pool ceiling impairments	$ 319,087		$ 0	$ 0
Asset impairment charges	$ 319,087		4,170	4,019
Successor | Drilling assets
Schedule of Impaired Long-Lived Assets Held and Used and Intangible Assets [Line Items]
Asset impairment charges			22	4,019
Successor | Electrical infrastructure assets
Schedule of Impaired Long-Lived Assets Held and Used and Intangible Assets [Line Items]
Asset impairment charges			0	0
Successor | Midstream assets
Schedule of Impaired Long-Lived Assets Held and Used and Intangible Assets [Line Items]
Asset impairment charges			$ 4,148	$ 0
Predecessor
Schedule of Impaired Long-Lived Assets Held and Used and Intangible Assets [Line Items]
Full cost pool ceiling impairments		$ 657,392
Asset impairment charges		718,194
Predecessor | Drilling assets
Schedule of Impaired Long-Lived Assets Held and Used and Intangible Assets [Line Items]
Asset impairment charges		3,511
Predecessor | Electrical infrastructure assets
Schedule of Impaired Long-Lived Assets Held and Used and Intangible Assets [Line Items]
Asset impairment charges		55,600
Predecessor | Midstream assets
Schedule of Impaired Long-Lived Assets Held and Used and Intangible Assets [Line Items]
Asset impairment charges		$ 1,691

X

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228

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- Definition

The excess of unamortized costs capitalized within a cost center, less related deferred income taxes, over the cost center ceiling limitation, which is charged to expense for oil and gas producing companies that use full cost method of accounting for investments in oil and gas producing properties.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-10(c)(4)(ii))
-URI http://asc.fasb.org/extlink&oid=82851474&loc=d3e511914-122862

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-Name Accounting Standards Codification
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-SubTopic 360
-Section S99
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=27015634&loc=d3e516453-122869

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- Definition

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+ References

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