Segment and Geographic Reporting Assets (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Property, plant and equipment	$ 1,260,172	$ 1,205,426
Goodwill (Note 2)	102,581	102,581
Other assets	541,797	424,868
Total Assets	1,904,550	1,732,875
Colombia [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	850,359	840,027
Goodwill (Note 2)	102,581	102,581
Other assets	233,336	222,220
Total Assets	1,186,276	1,164,828
Argentina [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	94,366	138,768
Goodwill (Note 2)	0	0
Other assets	39,209	47,038
Total Assets	133,575	185,806
Peru [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	178,531	95,940
Goodwill (Note 2)	0	0
Other assets	24,240	10,880
Total Assets	202,771	106,820
Brazil [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	133,874	127,394
Goodwill (Note 2)	0	0
Other assets	24,477	8,498
Total Assets	158,351	135,892
All Other [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	3,042	3,297
Goodwill (Note 2)	0	0
Other assets	220,535	136,232
Total Assets	$ 223,577	$ 139,529