Summary of Significant Accounting Policies - Schedule of Revenues from External Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Entity Wide Revenue Major Customer [Line Items]
Operating leases	$ 32,980	$ 22,915	$ 58,307	$ 40,047
Incentives	12,414	11,543	21,627	16,719
Operating leases and incentives	45,394	34,458	79,934	56,766
Solar energy systems and product sales	77,144	38,232	141,347	65,601
Total revenue	122,538	72,690	221,281	122,367
Solar Energy Systems
Entity Wide Revenue Major Customer [Line Items]
Solar energy systems and product sales	35,878	7,028	66,070	12,834
Products
Entity Wide Revenue Major Customer [Line Items]
Solar energy systems and product sales	$ 41,266	$ 31,204	$ 75,277	$ 52,767