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Segment Reporting (Details 2) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Dec. 31, 2015
Long Lived Assets |  |  |
Long Lived Assets in Entity's Country of Domicile | $ 797,172 |  | $ 787,986
Revenues |  |  |
Revenue | 148,387 | $ 152,956 |
United States [Member] |  |  |
Long Lived Assets |  |  |
Long Lived Assets in Entity's Country of Domicile | 347,021 |  | 336,210
Revenues |  |  |
Revenue | 93,654 | 88,069 |
Mexico [Member] |  |  |
Long Lived Assets |  |  |
Long Lived Assets in Entity's Country of Domicile | 397,406 |  | 390,694
Revenues |  |  |
Revenue | 30,522 | 40,141 |
BOLIVIA |  |  |
Long Lived Assets |  |  |
Long Lived Assets in Entity's Country of Domicile | 33,519 |  | 35,201
Revenues |  |  |
Revenue | 21,278 | 21,548 |
Australia [Member] |  |  |
Long Lived Assets |  |  |
Long Lived Assets in Entity's Country of Domicile | 3,317 |  | 5,952
Revenues |  |  |
Revenue | 1,891 | 1,945 |
Argentina [Member] |  |  |
Long Lived Assets |  |  |
Long Lived Assets in Entity's Country of Domicile | 10,843 |  | 10,871
Other Foreign Countries [Member] |  |  |
Long Lived Assets |  |  |
Long Lived Assets in Entity's Country of Domicile | 5,066 |  | $ 9,058
Revenues |  |  |
Revenue | $ 1,042 | $ 1,253 |

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