Segment and Related Information - Financial Information by Geographical Area (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 204,389	$ 201,663	$ 183,020	$ 158,691	$ 137,083	$ 104,554	$ 115,315	$ 114,544	$ 747,763	$ 471,496	$ 676,865
Long-Lived Assets	392,926				333,496				392,926	333,496	340,694
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									460,872	214,026	384,147
Long-Lived Assets	337,190				274,746				337,190	274,746	275,109
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									55,600	34,176	52,851
Long-Lived Assets	3,993				3,922				3,993	3,922	552
Algeria [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									87,975	80,936	65,272
EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									102,247	96,654	109,252
Long-Lived Assets	46,269				48,047				46,269	48,047	50,759
Latin America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									36,988	41,035	47,240
Long-Lived Assets	2,354				4,842				2,354	4,842	4,543
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									4,081	4,669	18,103
Long-Lived Assets	$ 3,120				$ 1,939				$ 3,120	$ 1,939	$ 9,731