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% | ||