Summary of Significant Accounting Policies - Schedule of Revenues from External Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Entity Wide Revenue Major Customer [Line Items]
Operating leases	$ 86,332	$ 63,962	$ 44,249
Incentives	31,672	20,044	10,491
Operating leases and incentives	118,004	84,006	54,740
Solar energy systems and product sales	186,602	114,551
Total revenue	304,606	198,557	$ 54,740
Solar Energy Systems
Entity Wide Revenue Major Customer [Line Items]
Solar energy systems and product sales	50,191	23,687
Products
Entity Wide Revenue Major Customer [Line Items]
Solar energy systems and product sales	$ 136,411	$ 90,864