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v3.20.1

Reclamation (Tables) | 3 Months Ended
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Mar. 31, 2020
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 | 2020 |  | 2019
Asset retirement obligation - Beginning | $ | 134,543 |  |  | $ | 133,508 |
Accretion | 2,804 |  |  | 2,895 |
Settlements | (719 | ) |  | (662 | )
Asset retirement obligation - Ending | $ | 136,628 |  |  | $ | 135,741 |

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