Asset Retirement Obligations (Details) - USD ($) $ in Thousands |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2019 |
Dec. 31, 2018 |
|
| Estimated Future Cash Undiscounted Amount | $ 29,700 | |
| Change in estimated liability | (59) | $ 2,840 |
| Pathfinder properties | ||
| Change in estimated liability | $ (59) |
| X | ||||||||||
- Definition Amount of estimated future cash undiscounted amount. No definition available.
|
| X | ||||||||||
- Definition Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|