Segment and Geographic Information - Net Revenues by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Summary of net revenues by geographic area
Net revenues	$ 77,466	$ 66,674	$ 36,795	$ 40,578	$ 136,840	$ 106,540	$ 121,480	$ 144,698	$ 221,513	$ 509,558	$ 549,167
North America [Member]
Summary of net revenues by geographic area
Net revenues										130,224	150,160
Latin America [Member]
Summary of net revenues by geographic area
Net revenues										111,078	54,008
Africa [Member]
Summary of net revenues by geographic area
Net revenues										75,507	16,474
Asia Pacific [Member]
Summary of net revenues by geographic area
Net revenues										49,881	52,672
Middle East [Member]
Summary of net revenues by geographic area
Net revenues										39,142	63,157
Commonwealth of Independent States [Member]
Summary of net revenues by geographic area
Net revenues										$ 3,538	$ 13,719