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Reclamation (Tables) | 9 Months Ended
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Sep. 30, 2014
Asset Retirement Obligation Disclosure [Abstract] |
Asset Retirement Obligation | Changes to the Company’s asset retirement obligations (included in Reclamation) are as follows:
In thousands | Nine months ended September 30,
| 2014 |  | 2013
Asset retirement obligation - Beginning | $ | 57,454 |  |  | $ | 34,456 |
Accretion | 4,205 |  |  | 2,277 |
Additions and changes in estimates | — |  |  | 19,542 |
Settlements | (470 | ) |  | (502 | )
Asset retirement obligation - Ending | $ | 61,189 |  |  | $ | 55,773 |

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