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Reclamation | 6 Months Ended
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Jun. 30, 2017
Asset Retirement Obligation Disclosure [Abstract] |
RECLAMATION | RECLAMATION Reclamation and mine closure costs are based principally on legal and regulatory requirements. Management estimates costs associated with reclamation of mining properties. 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 are as follows:
| Three months ended June 30, |  | Six months ended June 30,
In thousands | 2017 |  | 2016 |  | 2017 |  | 2016
Asset retirement obligation - Beginning | $ | 99,240 |  |  | $ | 83,974 |  |  | $ | 97,380 |  |  | $ | 82,072 |
Accretion | 2,397 |  |  | 2,009 |  |  | 4,735 |  |  | 3,968 |
Additions and changes in estimates | — |  |  | (130 | ) |  | — |  |  | 121 |
Settlements | (510 | ) |  | (308 | ) |  | (988 | ) |  | (616 | )
Asset retirement obligation - Ending | $ | 101,127 |  |  | $ | 85,545 |  |  | $ | 101,127 |  |  | $ | 85,545 |
The Company has accrued $2.0 million and $1.9 million at June 30, 2017 and December 31, 2016, respectively, for reclamation liabilities related to former mining activities, which are 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 -URI http://asc.fasb.org/subtopic&trid=2175671 + Details
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