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Basis of Presentation and Summary of Significant Accounting Policies - Credit Risk and Other Concentrations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Successor
Concentration Risk [Line Items]
Derivative fair value	$ 0.7
Customer Concentration Risk | Plains Marketing, LP | Successor | Sales Revenue, Net
Concentration Risk [Line Items]
Concentration risk percent	48.00%
Customer Concentration Risk | Plains Marketing, LP | Predecessor | Sales Revenue, Net
Concentration Risk [Line Items]
Concentration risk percent		64.00%	78.00%
Customer Concentration Risk | Shell Trading (US) Company | Successor | Sales Revenue, Net
Concentration Risk [Line Items]
Concentration risk percent	22.00%
Customer Concentration Risk | Permian Transport and Trading | Successor | Sales Revenue, Net
Concentration Risk [Line Items]
Concentration risk percent	11.00%

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-Publisher FASB
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