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INVESTMENT IN MINERA SANTA CRUZ S.A. (''MSC'') - SAN JOSE MINE (Details 3) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended | 12 Months Ended
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Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2013
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE |  |  |  |  |
Income tax recovery | $ (25,034) | $ (12,405) | $ (43,991) | $ (18,868) |
Income (loss) on investment in Minera Santa Cruz S.A. (net of amortization) | (2,438) | (1,551) | 4,591 | (1,788) |
Minera Santa Cruz S A [Member] |  |  |  |  |
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE |  |  |  |  |
Net sales percentage | 100.00% | 100.00% | 100.00% | 100.00% |
Net sales | 53,234 | 68,556 | 110,123 | 112,369 |
Production costs applicable to sales | (41,847) | (57,606) | (81,484) | (94,409) |
(Loss) income from operations before extraordinary items | (390) | 124 | 5,792 | 2,564 |
Net (loss) income | (390) | 124 | 5,792 | 2,564 |
Ownership interest (as a percent) | 49.00% | 49.00% | 49.00% | 49.00% |
Net (loss) income | (191) | 61 | 2,838 | 1,256 | 2,126
Amortization of fair value increments | (3,429) | (6,710) | (6,130) | (12,003) | (18,425)
Income tax recovery | 1,182 | 5,098 | 7,883 | 8,959 | 17,145
Income (loss) on investment in Minera Santa Cruz S.A. (net of amortization) | $ (2,438) | $ (1,551) | $ 4,591 | $ (1,788) |

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