Segment Reporting (Details 2) - Segments [Domain] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	$ 1,119,458		$ 1,119,458		$ 729,103
Revenues
Revenue	166,263	$ 164,562	319,219	$ 324,195
United States [Member]
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	355,289		355,289		275,594
Revenues
Revenue			187,249	120,427
Australia [Member]
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	18,252		18,252		21,362
Revenues
Revenue			5,028	4,860
Argentina [Member]
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	10,937		10,937		10,970
BOLIVIA
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	100,386		100,386		107,960
Revenues
Revenue			44,913	56,632
Mexico [Member]
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	620,011		620,011		298,101
Revenues
Revenue			79,584	141,167
Other Foreign Countries [Member]
Long Lived Assets
Long Lived Assets in Entity's Country of Domicile	$ 14,583		14,583		$ 15,116
Revenues
Revenue			$ 2,445	$ 1,109