Intangible Assets - Schedule of Gross Carrying Amounts and Accumulated Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 1,000	$ 1,900
Revenue contract
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Remaining Weighted Average Amortization Period (Years)		19 years	20 years
Gross Carrying Amount	84,643	$ 84,643	$ 84,643
Accumulated Amortization	(3,537)	(3,537)	(1,632)
Accumulated Currency Translation Adjustment	(11,052)	(11,052)	(12,381)
Net Book Value	70,054	$ 70,054	$ 70,630
Minimum | Revenue contract
Finite-Lived Intangible Assets [Line Items]
Weighted average remaining life of intangibles		20 years
Maximum | Revenue contract
Finite-Lived Intangible Assets [Line Items]
Weighted average remaining life of intangibles		25 years
Operating revenues, net
Finite-Lived Intangible Assets [Line Items]
Amortization expense	200	$ 400
Depreciation, accretion and amortization
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 800	$ 1,500