Acquisitions - Schedule of Acquisition Accounting (Details) - Alto Cielo $ in Thousands	Apr. 08, 2016 USD ($)
Business Acquisition [Line Items]
Cash and cash equivalents	$ 190
Restricted cash	1,923
Accounts receivable	311
Power plants	35,414
Other assets	2,738
Total assets acquired	40,576
Accrued expenses and other current liabilities	3,670
Deferred tax liabilities	557
Long term debt, including current portion	4,031
Total liabilities assumed	8,258
Fair value of net assets acquired	$ 32,318