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INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE (Details 3) (USD $) | 12 Months Ended |  | 3 Months Ended | 11 Months Ended | 12 Months Ended |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2012 MSC | Jun. 30, 2012 MSC | Mar. 31, 2012 MSC | Dec. 31, 2012 MSC | Dec. 31, 2012 MSC | Jan. 24, 2012 MSC | Dec. 31, 2012 MSC Dividend Declared | Dec. 31, 2012 MSC Minera Andes
Summary of MSC's financial information from operations |  |  |  |  |  |  |  |  |  |
Sales percentage |  |  |  |  |  | 100.00% |  |  |  |
Sales |  |  |  |  |  | $ 290,848,000 |  |  |  |
Net income percentage |  |  |  |  |  | 100.00% |  |  |  |
Net income |  |  | (2,654,000) | (20,364,000) | (17,351,000) | 51,634,000 |  |  |  |
Ownership interest (as a percent) |  |  |  |  |  | 49.00% | 49.00% | 49.00% |  |
Net income on investment in MSC |  |  |  |  |  | 25,301,000 |  |  |  |
Amortization of fair value increments |  |  | (1,668,000) | (916,000) | (953,000) | (4,466,000) |  |  |  |
Income on investment in MSC, net of amortization | 20,835,000 |  |  |  |  | 20,835,000 | 20,835,000 |  |  |
Current assets | 91,918,000 | 47,883,000 |  |  |  | 136,900,000 | 136,900,000 |  |  |
Total assets | 1,150,937,000 | 310,355,000 |  |  |  | 814,400,000 | 814,400,000 |  |  |
Current liabilities | 25,195,000 | 6,124,000 |  |  |  | 66,400,000 | 66,400,000 |  |  |
Total liabilities | 261,346,000 | 91,051,000 |  |  |  | 261,700,000 | 261,700,000 |  |  |
Dividend received |  |  |  |  |  |  | $ 19,200,000 |  | $ 9,800,000 | $ 9,400,000

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