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INVESTMENT IN MINERA SANTA CRUZ S.A. (''MSC'') - SAN JOSE MINE (Details 4) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2013 | Dec. 31, 2013 | Jun. 30, 2014
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE |  |  |  |
Current assets |  |  | $ 46,771 | $ 42,081
Total assets | 923,066 | 923,066 | 923,066 | 796,270
Current liabilities |  |  | 11,189 | 13,693
Total liabilities |  |  | 176,299 | 134,897
Impairment of investment in MSC | 95,878 | 95,878 |  |
Minera Santa Cruz S A [Member] |  |  |  |
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE |  |  |  |
Current assets |  |  |  | 100,000
Total assets |  |  |  | 529,500
Current liabilities |  |  |  | 48,100
Total liabilities |  |  |  | 140,000
Impairment of investment in MSC | 95,900 | 95,900 | 95,878 |
Minera Santa Cruz S A [Member] | Current Period Values Excluding Fair Value Increments And Impairment Charge [Member] |  |  |  |
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE |  |  |  |
Current assets |  |  |  | 102,700
Total assets |  |  |  | 312,700
Current liabilities |  |  |  | 48,100
Total liabilities |  |  |  | $ 89,200

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