Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Accruals and reserves	$ 8,523	$ 4,582
Stock-based compensation	7,791	9,068
Tax credits	1,744
Transaction costs		4,216
Other	351	395
Gross deferred tax assets	18,409	18,261
Valuation allowance	(204)	(212)
Net deferred tax assets	18,205	18,049
Deferred tax liabilities:
Investment in solar funds	(368,536)	(220,803)
Depreciation and amortization	(38,116)	(13,004)
Interest rate swaps	(5,732)
Accruals and reserves	(1,039)	(275)
Gross deferred tax liabilities	(413,423)	(234,082)
Net deferred tax liabilities	$ (395,218)	$ (216,033)