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Reclamation (Tables) | 6 Months Ended
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Jun. 30, 2014
Asset Retirement Obligation Disclosure [Abstract] |
Asset Retirement Obligation | Changes to the Company’s asset retirement obligations are as follows (in thousands):
| Three months ended June 30, |  | Six months ended June 30,
| 2014 |  | 2013 |  | 2014 |  | 2013
Asset retirement obligation - Beginning | $ | 58,460 |  |  | $ | 35,197 |  |  | $ | 57,454 |  |  | $ | 34,457 |
Accretion | 1,435 |  |  | 758 |  |  | 2,752 |  |  | 1,500 |
Settlements | (100 | ) |  | (377 | ) |  | (411 | ) |  | (379 | )
Asset retirement obligation - Ending | $ | 59,795 |  |  | $ | 35,578 |  |  | $ | 59,795 |  |  | $ | 35,578 |

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