Asset Retirement Obligations (Details) - USD ($) $ in Thousands |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2020 |
Dec. 31, 2019 |
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| Estimated Future Cash Undiscounted Amount | $ 29,800 | |
| Estimated future cost to complete reclamation including inflation | $ 39,900 | |
| Change in estimated liability | $ 11 | |
| Minimum | ||
| Discount Rate Of Asset Retirement Obligations | 0.33% | |
| Maximum | ||
| Discount Rate Of Asset Retirement Obligations | 7.25% |
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- Definition Discount Rate Of Asset Retirement Obligations No definition available.
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- Definition Amount of estimated future cash undiscounted amount. No definition available.
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- Definition The amount of estimated future cost to complete reclamation including inflation. No definition available.
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- 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
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