Business and Organization (Details) - item |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2018 |
Feb. 06, 2017 |
Jun. 30, 2016 |
|
| Water Handling and Treatment | |||
| Business and Organization | |||
| Number of independent fresh water systems | 2 | ||
| Stonewall Gas Gathering LLC | |||
| Business and Organization | |||
| Ownership percentage | 15.00% | 15.00% | |
| Appalachia Joint venture | |||
| Business and Organization | |||
| Ownership percentage | 50.00% | ||
| Mark West | Appalachia Joint venture | |||
| Business and Organization | |||
| Ownership percentage | 50.00% |