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Reclamation | 3 Months Ended
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Mar. 31, 2015
Asset Retirement Obligation Disclosure [Abstract] |
RECLAMATION AND MINE CLOSURE | RECLAMATION Reclamation and mine closure costs are based principally on legal and regulatory requirements. Management estimates costs associated with reclamation of mining properties. The Company uses assumptions about future costs, mineral prices, mineral processing recovery rates, production levels, capital costs, and reclamation costs. On an ongoing basis, management evaluates its estimates and assumptions, and future expenditures could differ from current estimates. Changes to the Company’s asset retirement obligations for operating sites (included in Reclamation) are as follows:
| Three months ended March 31,
In thousands | 2015 |  | 2014
Asset retirement obligation - Beginning | $ | 67,214 |  |  | $ | 57,454 |
Accretion | 1,412 |  |  | 1,317 |
Additions and changes in estimates | 18,292 |  |  | — |
Settlements | (859 | ) |  | (311 | )
Asset retirement obligation - Ending | $ | 86,059 |  |  | $ | 58,460 |
The increase in asset retirement obligations in the three months ended March 31, 2015 is due to the acquisition of the Wharf gold mine. The Company has accrued $3.7 million and $3.6 million at March 31, 2015 and December 31, 2014, respectively, for reclamation liabilities related to former mining activities. These amounts are also included in Reclamation.

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- Definition The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7569-110849 + Details
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