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v3.21.1

Reclamation (Tables) | 3 Months Ended
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Mar. 31, 2021
Asset Retirement Obligation Disclosure [Abstract] |
Asset Retirement Obligation | Changes to the Company’s asset retirement obligations for its operating sites are as follows:
|  |  | Three Months Ended March 31,
In thousands |  |  |  |  | 2021 |  | 2020
Asset retirement obligation - Beginning |  |  |  |  | $ | 137,120 |  |  | $ | 134,543 |
Accretion |  |  |  |  | 2,863 |  |  | 2,804 |
Settlements |  |  |  |  | (629) |  |  | (719) |
Asset retirement obligation - Ending |  |  |  |  | $ | 139,354 |  |  | $ | 136,628 |

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