Summary of Significant Accounting Policies - Schedule of Revenues from External Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Entity Wide Revenue Major Customer [Line Items]
Operating leases	$ 35,062	$ 25,327
Incentives	13,036	9,213
Operating leases and incentives	48,098	34,540
Solar energy systems and product sales	56,019	64,203
Total revenue	104,117	98,743
Solar Energy Systems
Entity Wide Revenue Major Customer [Line Items]
Solar energy systems and product sales	20,619	30,192
Products
Entity Wide Revenue Major Customer [Line Items]
Solar energy systems and product sales	$ 35,400	$ 34,011