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Summary of Significant Accounting Policies - Concentration Risk (Details) - USD ($) $ in Thousands		3 Months Ended								9 Months Ended	12 Months Ended
	Oct. 01, 2016	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Oct. 01, 2016	Dec. 31, 2017	Dec. 31, 2015
Successor
Concentration Risk [Line Items]
Sales		$ 93,206	$ 80,892	$ 84,851	$ 98,350	$ 98,456					$ 357,299
Successor | Plains Marketing, L.P.
Concentration Risk [Line Items]
Sales						$ 32,022					$ 117,927
Percentage of revenue						32.50%					33.00%
Successor | Targa Pipeline Mid-Continent West OK LLC
Concentration Risk [Line Items]
Sales						$ 35,845					$ 144,583
Percentage of revenue						36.40%					40.50%
Predecessor
Concentration Risk [Line Items]
Sales	$ 0						$ 104,056	$ 99,421	$ 90,332	$ 293,809		$ 768,709
Predecessor | Plains Marketing, L.P.
Concentration Risk [Line Items]
Sales										$ 110,370		$ 318,018
Percentage of revenue										37.60%		41.40%
Predecessor | Targa Pipeline Mid-Continent West OK LLC
Concentration Risk [Line Items]
Sales										$ 108,238		$ 231,649
Percentage of revenue										36.80%		30.10%

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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