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SEGMENTED INFORMATION (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2013
Operating Segment Reporting |  |  |  |  |
Gold and silver sales | $ 11,637 | $ 10,459 | $ 22,767 | $ 23,957 |
Production costs applicable to sales | (10,900) | (8,278) | (19,427) | (18,871) |
Mine construction costs | (217) |  | (1,156) |  |
Mine development costs | (155) | (98) | (1,723) | (569) |
Exploration costs | (2,637) | (4,889) | (5,317) | (19,489) |
Impairment of mineral property interests and property and equipment | 120,398 | 27,729 | 120,398 | 27,729 |
Income (loss) on investment in Minera Santa Cruz S.A. (net of amortization) | (2,438) | (1,551) | 4,591 | (1,788) |
Impairment of investment in MSC |  | (95,878) |  | (95,878) |
Gain on sale of assets | 18 | (6,791) | 18 | (6,791) |
Operating loss | (129,374) | (139,654) | (129,936) | (158,021) |
Investment in Minera Santa Cruz S.A. | 210,425 | 212,947 | 210,425 | 212,947 | 212,947
Mineral property interests | 521,884 | 642,968 | 521,884 | 642,968 | 642,968
Total assets | 796,270 | 923,066 | 796,270 | 923,066 | 923,066
Argentina Reportable Segment [Member] |  |  |  |  |
Operating Segment Reporting |  |  |  |  |
Exploration costs | (249) | (2,017) | (750) | (13,479) |
Impairment of mineral property interests and property and equipment | 120,398 | 27,729 | 120,398 | 27,729 |
Income (loss) on investment in Minera Santa Cruz S.A. (net of amortization) | (2,438) | (1,551) | 4,591 | (1,788) |
Impairment of investment in MSC |  | (95,878) |  | (95,878) |
Gain on sale of assets |  | (326) |  | (326) |
Operating loss | (123,817) | (129,703) | (117,559) | (141,615) |
Investment in Minera Santa Cruz S.A. | 210,425 | 212,947 | 210,425 | 212,947 |
Mineral property interests | 337,805 | 458,203 | 337,805 | 458,203 |
Total assets | 551,324 | 674,269 | 551,324 | 674,269 |
Mexico Reportable Segment [Member] |  |  |  |  |
Operating Segment Reporting |  |  |  |  |
Gold and silver sales | 11,637 | 10,459 | 22,767 | 23,957 |
Production costs applicable to sales | (10,900) | (8,278) | (19,427) | (18,871) |
Mine construction costs | (217) |  | (1,156) |  |
Mine development costs | (155) | (98) | (1,723) | (569) |
Exploration costs | (1,488) | (1,949) | (2,876) | (4,434) |
Operating loss | (2,150) | (970) | (5,198) | (3,020) |
Mineral property interests | 11,341 | 11,984 | 11,341 | 11,984 |
Total assets | 59,649 | 54,131 | 59,649 | 54,131 |
United States Reportable Segment [Member] |  |  |  |  |
Operating Segment Reporting |  |  |  |  |
Exploration costs | (831) | (870) | (1,517) | (1,450) |
Gain on sale of assets |  | (6,468) |  | (6,468) |
Operating loss | (1,025) | (6,110) | (2,454) | (7,055) |
Mineral property interests | 172,738 | 172,781 | 172,738 | 172,781 |
Total assets | 176,415 | 177,248 | 176,415 | 177,248 |
Corporate And Other [Member] |  |  |  |  |
Operating Segment Reporting |  |  |  |  |
Exploration costs | (69) | (53) | (174) | (126) |
Gain on sale of assets |  | 3 |  | 3 |
Operating loss | (2,382) | (2,871) | (4,725) | (6,331) |
Total assets | $ 8,882 | $ 17,418 | $ 8,882 | $ 17,418 |

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- Definition Exploration expenses (including prospecting) related to the mining industry would be included in operating expenses. Exploration costs include costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of mineral reserves. + References No definition available. + Details
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- Definition Mineral properties, net of adjustments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -Section 25 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6474861&loc=d3e64895-109465 + Details
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