Solar Energy Systems, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Property Subject To Or Available For Operating Lease [Line Items]
Solar energy systems, gross	$ 1,807,643	$ 1,566,667
Less: accumulated depreciation and amortization	(176,161)	(143,028)
Add: construction-in-progress	64,246	56,584
Total solar energy systems, net	1,695,728	1,480,223
Solar Energy System Equipment Costs
Property Subject To Or Available For Operating Lease [Line Items]
Solar energy systems, gross	1,610,120	1,406,478
Inverters
Property Subject To Or Available For Operating Lease [Line Items]
Solar energy systems, gross	148,714	123,910
Initial Direct Costs
Property Subject To Or Available For Operating Lease [Line Items]
Solar energy systems, gross	$ 48,809	$ 36,279