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MINERAL PROPERTY INTERESTS AND ASSET RETIREMENT OBLIGATIONS (Tables) | 12 Months Ended
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Dec. 31, 2014
MINERAL PROPERTY INTERESTS AND ASSET RETIREMENT OBLIGATIONS |
Schedule of impairment charges on mineral property |
Name of Property/Complex |  | Segment |  | 2014 |  | 2013 |  | 2012 |
|  |  |  | (in thousands) |  |  |
Los Azules Project |  | Argentina |  | $ | 228,301 |  | $ | — |  | $ | — |
Other San Juan Properties |  | Argentina |  |  | 7,817 |  |  | — |  |  | — |
Telken Tenements(1) |  | Argentina |  |  | — |  |  | 13,792 |  |  | — |
Este Tenements(1) |  | Argentina |  |  | — |  |  | 2,784 |  |  | — |
Piramides Tenements(1) |  | Argentina |  |  | — |  |  | 5,079 |  |  | — |
Tobias Tenements(1) |  | Argentina |  |  | — |  |  | 6,074 |  |  | — |
Cerro Mojon Tenements |  | Argentina |  |  | 1,971 |  |  | — |  |  | — |
La Merced Tenements |  | Argentina |  |  | 1,891 |  |  | — |  |  | — |
Cabeza de Vaca Tenements |  | Argentina |  |  | 877 |  |  | — |  |  | — |
El Trumai Tenements |  | Argentina |  |  | 1,534 |  |  | — |  |  | — |
Martes 13 Tenements |  | Argentina |  |  | 3,568 |  |  | — |  |  | — |
Celestina Tenements |  | Argentina |  |  | 1,753 |  |  | — |  |  | — |
Other Santa Cruz Exploration Properties |  | Argentina |  |  | 7,601 |  |  | — |  |  | — |
Tonkin Complex |  | Nevada |  |  | 31,391 |  |  | — |  |  | — |
Gold Bar Complex |  | Nevada |  |  | 25,435 |  |  | — |  |  | — |
Limo Complex |  | Nevada |  |  | 23,438 |  |  | 19,450 |  |  | — |
North Battle Mountain Complex |  | Nevada |  |  | 1,921 |  |  | — |  |  | 14,044 |
East Battle Mountain Complex |  | Nevada |  |  | 4,060 |  |  | — |  |  | — |
West Battle Mountain Complex |  | Nevada |  |  | 2,567 |  |  | 6,287 |  |  | — |
Other United States Properties |  | Nevada |  |  | 9,611 |  |  | 9,497 |  |  | 2,902 |
El Gallo 2 Properties |  | Mexico |  |  | — |  |  | — |  |  | 1,343 |
Property, plant and equipment |  | Argentina |  |  | — |  |  | — |  |  | 179 |
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Total impairments |  |  |  | $ | 353,736 |  | $ | 62,963 |  | $ | 18,468 |
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(1) | In the fourth quarter of 2013, these tenements were transferred to MSC as part of the vend-in agreement described in Note 7, Investment in Minera Santa Cruz S.A. ("MSC")—San José Mine, and were therefore not included in the Company's mineral property interests as at December 31, 2014 and 2013.
Summary of mineral property interests |
Name of Property/Complex |  | State/Province |  | Country |  | 2014 |  | 2013 |
|  |  |  |  |  | (in thousands) |
Los Azules Copper Project |  | San Juan |  | Argentina |  | $ | 202,889 |  | $ | 431,190 |
Other San Juan Exploration Properties |  | San Juan |  | Argentina |  |  | — |  |  | 7,818 |
Cerro Mojon Tenements |  | Santa Cruz |  | Argentina |  |  | — |  |  | 1,971 |
La Merced Tenements |  | Santa Cruz |  | Argentina |  |  | — |  |  | 1,891 |
Cabeza de Vaca Tenements |  | Santa Cruz |  | Argentina |  |  | — |  |  | 877 |
El Trumai Tenements |  | Santa Cruz |  | Argentina |  |  | — |  |  | 1,534 |
Martes 13 Tenements |  | Santa Cruz |  | Argentina |  |  | — |  |  | 3,568 |
Celestina Tenements |  | Santa Cruz |  | Argentina |  |  | — |  |  | 1,753 |
Other Santa Cruz Exploration Properties |  | Santa Cruz |  | Argentina |  |  | — |  |  | 7,601 |
Tonkin Complex |  | Nevada |  | United States |  |  | 20,423 |  |  | 51,946 |
Gold Bar Complex |  | Nevada |  | United States |  |  | 51,577 |  |  | 77,012 |
Limo Complex |  | Nevada |  | United States |  |  | — |  |  | 23,438 |
North Battle Mountain Complex |  | Nevada |  | United States |  |  | 2,227 |  |  | 4,148 |
East Battle Mountain Complex |  | Nevada |  | United States |  |  | — |  |  | 4,060 |
West Battle Mountain Complex |  | Nevada |  | United States |  |  | — |  |  | 2,567 |
Other United States Properties |  | Nevada |  | United States |  |  | — |  |  | 9,610 |
El Gallo 1 Mine |  | Sinaloa |  | Mexico |  |  | 7,214 |  |  | 8,502 |
El Gallo 2 Properties |  | Sinaloa |  | Mexico |  |  | 3,482 |  |  | 3,482 |
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Total Mineral Property Interests |  |  |  |  |  | $ | 287,812 |  | $ | 642,968 |
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Schedule of reconciliation of asset retirement obligations |
|  | 2014 |  | 2013 |
|  | (in thousands) |
Asset retirement obligation liability, beginning balance |  | $ | 7,247 |  | $ | 6,359 |
Settlements |  |  | (52 | ) |  | (60 | )
Accretion of liability |  |  | 407 |  |  | 461 |
Adjustment reflecting updated estimates |  |  | (131 | ) |  | 487 |
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Asset retirement obligation liability, ending balance |  | $ | 7,471 |  | $ | 7,247 |
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