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OPERATING SEGMENT REPORTING (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Operating Segment Reporting |  |  |
Gold and silver sales | $ 72,956 | $ 45,303 | $ 45,982
Production costs applicable to sales | 34,607 | 40,608 | 34,594
Mine construction costs |  | (1,723) | (1,383)
Mine development costs | (1,169) | (1,829) | (847)
Exploration costs | (8,798) | (11,332) | (24,829)
General and administrative expenses | (12,045) | (12,069) | (14,001)
Impairment of mineral property interests and property and equipment | (50,600) | (353,736) | (62,963)
Impairment of investment in MSC | (11,777) | (21,162) | (95,878)
Income (loss) on investment in Minera Santa Cruz S.A. (net of amortization) | 2,414 | (5,284) | 846
Gain (loss) on sale of assets | 13 | 26 | (6,743)
Operating (loss) income | (49,320) | (410,165) | (200,397)
Income tax recovery | 24,560 | 107,170 | 53,365
Investment in Minera Santa Cruz S.A. | 167,107 | 177,018 | 212,947
Mineral property interests | 237,245 | 287,812 | 642,968
Total assets | 475,085 | 522,958 | 923,102
Argentina |  |  |
Operating Segment Reporting |  |  |
Exploration costs | (1,481) | (2,453) | (14,776)
General and administrative expenses | (647) | (969) | (1,267)
Impairment of mineral property interests and property and equipment | (11,399) | (255,313) | (27,729)
Impairment of investment in MSC | (11,777) | (21,162) | (95,878)
Income (loss) on investment in Minera Santa Cruz S.A. (net of amortization) | 2,414 | (5,284) | 846
Gain (loss) on sale of assets |  |  | (316)
Operating (loss) income | (23,434) | (285,800) | (139,784)
Income tax recovery | 10,759 | 74,952 | 38,015
Investment in Minera Santa Cruz S.A. | 167,107 | 177,018 | 212,947
Mineral property interests | 191,490 | 202,889 | 458,203
Total assets | 361,023 | 382,637 | 674,269
Mexico |  |  |
Operating Segment Reporting |  |  |
Gold and silver sales | 72,956 | 45,303 | 45,982
Production costs applicable to sales | 34,607 | 40,608 | 34,594
Mine construction costs |  | (1,723) | (1,383)
Mine development costs | (761) | (1,829) | (847)
Exploration costs | (4,526) | (5,468) | (6,658)
General and administrative expenses | (3,953) | (3,194) | (2,858)
Impairment of mineral property interests and property and equipment | (1,972) |  |
Operating (loss) income | 23,864 | (10,101) | (2,998)
Income tax recovery | 1,292 | 371 | 495
Mineral property interests | 9,408 | 10,696 | 11,984
Total assets | 62,983 | 58,936 | 54,131
United States |  |  |
Operating Segment Reporting |  |  |
Mine development costs | (408) |  |
Exploration costs | (2,517) | (3,060) | (2,952)
General and administrative expenses | (203) | (211) | (314)
Impairment of mineral property interests and property and equipment | (37,229) | (98,423) | (35,234)
Gain (loss) on sale of assets |  |  | (6,430)
Operating (loss) income | (41,975) | (105,797) | (47,422)
Income tax recovery | 12,952 | 31,632 | 14,855
Mineral property interests | 36,347 | 74,227 | 172,781
Total assets | 36,983 | 74,806 | 177,284
Corporate & Other |  |  |
Operating Segment Reporting |  |  |
Exploration costs | (274) | (351) | (443)
General and administrative expenses | (7,242) | (7,695) | (9,562)
Gain (loss) on sale of assets |  |  | 3
Operating (loss) income | (7,775) | (8,467) | (10,193)
Income tax recovery | (443) | 215 |
Total assets | $ 14,096 | $ 6,579 | $ 17,418

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