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v2.4.0.8

Segment Reporting (Details 2) (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
Long Lived Assets |  |  |  |  |
Entity Wide Disclosure on Geographic Areas Long Lived Assets in Entity's Country of Domicile and Foreign Countries | $ 2,211,454 |  | $ 2,211,454 |  | $ 2,237,774
Revenues |  |  |  |  |
Total Revenue | 164,562 | 204,525 | 324,195 | 376,322 |
United States [Member] |  |  |  |  |
Long Lived Assets |  |  |  |  |
Long Lived Assets in Entity's Country of Domicile | 387,617 |  | 387,617 |  | 384,626
Revenues |  |  |  |  |
Total Revenue | 60,212 | 65,754 | 120,427 | 144,502 |
Australia [Member] |  |  |  |  |
Long Lived Assets |  |  |  |  |
Long Lived Assets in Entity's Country of Domicile | 23,858 |  | 23,858 |  | 25,668
Revenues |  |  |  |  |
Total Revenue | 1,971 | 3,479 | 4,860 | 6,462 |
Argentina [Member] |  |  |  |  |
Long Lived Assets |  |  |  |  |
Long Lived Assets in Entity's Country of Domicile | 94,495 |  | 94,495 |  | 94,705
Bolivia [Member] |  |  |  |  |
Long Lived Assets |  |  |  |  |
Long Lived Assets in Entity's Country of Domicile | 228,606 |  | 228,606 |  | 235,085
Revenues |  |  |  |  |
Total Revenue | 29,078 | 49,236 | 56,632 | 82,377 |
Mexico [Member] |  |  |  |  |
Long Lived Assets |  |  |  |  |
Long Lived Assets in Entity's Country of Domicile | 1,461,228 |  | 1,461,228 |  | 1,487,228
Revenues |  |  |  |  |
Total Revenue | 72,657 | 86,217 | 141,167 | 143,643 |
Other Foreign Countries [Member] |  |  |  |  |
Long Lived Assets |  |  |  |  |
Long Lived Assets in Entity's Country of Domicile | 15,650 |  | 15,650 |  | 10,462
Revenues |  |  |  |  |
Total Revenue | $ 644 | $ (161) | $ 1,109 | $ (662) |

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