Power Plants - Schedule of Power Plants, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Renewable energy facility [Line Items]
Total power plants in service, at cost	$ 1,443,506		$ 1,443,506		$ 1,246,691
Less: accumulated depreciation	(69,180)		(69,180)		(40,600)
Total power plants in service, net	1,374,326		1,374,326		1,206,091
Power plants, net	1,375,254		1,375,254		1,206,604
Land
Renewable energy facility [Line Items]
Total power plants in service, at cost	11,225		11,225		9,749
Wind power plants
Renewable energy facility [Line Items]
Total power plants in service, at cost	773,869		773,869		562,086
Solar power plants
Renewable energy facility [Line Items]
Total power plants in service, at cost	658,412		658,412		674,856
Construction in progress - solar projects
Renewable energy facility [Line Items]
Power plants, net	928		928		513
Power plants
Renewable energy facility [Line Items]
Depreciation	12,100	$ 3,000	$ 25,800	$ 5,700
Solar Energy Corporation of India (SECI) | India PSA
Renewable energy facility [Line Items]
Solar generation, subsidy receipts, year one, percentage			10.00%
Solar generation, subsidy receipts, next twelve months, percentage			50.00%
Viability Gap Funding subsidies			$ 8,900
Solar Energy Corporation of India (SECI) | India PSA | Other current assets
Renewable energy facility [Line Items]
Solar generation, government subsidies receivable	1,800		1,800		10,700
Solar Energy Corporation of India (SECI) | India PSA | Other assets
Renewable energy facility [Line Items]
Solar generation, government subsidies receivable	$ 7,000		$ 7,000		$ 7,100