Severance Costs - Costs by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Restructuring Cost and Reserve [Line Items]
Severance expenses	$ 461	$ 0	$ 6,827	$ 0
Colombia [Member]
Restructuring Cost and Reserve [Line Items]
Severance expenses	0		1,237
Peru [Member]
Restructuring Cost and Reserve [Line Items]
Severance expenses	439		1,863
Brazil [Member]
Restructuring Cost and Reserve [Line Items]
Severance expenses	0		109
All Other [Member]
Restructuring Cost and Reserve [Line Items]
Severance expenses	$ 22		$ 3,618