Segment and Geographic Reporting - Long-lived Assets by Geographical Area (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Property, plant and equipment	$ 1,066,609	$ 788,993
Goodwill	102,581	102,581
All other assets	198,706	254,544
Total Assets (Note 5)	1,367,896	1,146,118
Operating Segments | Colombia
Segment Reporting Information [Line Items]
Property, plant and equipment	939,947	574,351
Goodwill	102,581	102,581
All other assets	177,393	93,479
Total Assets (Note 5)	1,219,921	770,411
Operating Segments | Peru
Segment Reporting Information [Line Items]
Property, plant and equipment	68,428	95,069
Goodwill	0	0
All other assets	10,848	21,111
Total Assets (Note 5)	79,276	116,180
Operating Segments | Brazil
Segment Reporting Information [Line Items]
Property, plant and equipment	55,196	115,552
Goodwill	0	0
All other assets	1,619	2,236
Total Assets (Note 5)	56,815	117,788
All Other
Segment Reporting Information [Line Items]
Property, plant and equipment	3,038	4,021
Goodwill	0	0
All other assets	8,846	137,718
Total Assets (Note 5)	$ 11,884	$ 141,739