Discontinued Operations - Statement of Cash Flows (Details) - Midstream Business - Discontinued Operations, Disposed of by Means Other than Sale, Spinoff - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2018
Operating activities:
Deferred income tax benefit		$ (124,331)
Depreciation	$ 47,295	138,458
Amortization of intangible assets	$ 10,387	31,160
Other income		(39,029)
Share-based compensation expense		$ 1,293

Disposal Group, Including Discontinued Operation, Amortization of Intangible Asset

No definition available.

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- Definition

Disposal Group, Including Discontinued Operation, Cash Flow from Operating Activities [Abstract]

+ References

No definition available.

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- Definition

Disposal Group, Including Discontinued Operation, Increase (Decrease) in Deferred Income Taxes

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No definition available.

+ Details

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- Definition

Disposal Group, Including Discontinued Operation, Share-based Compensation Expense

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No definition available.

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- Definition

Amount of depreciation and amortization expense attributable to disposal group, including, but not limited to, discontinued operation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760

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- Definition

Amount of other income attributable to disposal group, including, but not limited to, discontinued operation.

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