Goodwill and Intangible Assets - Summary of Carrying Value of Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite Lived Intangible Assets Future Amortization Expense [Abstract]
Balance - beginning of the period	$ 223,637	$ 129,290
Acquisitions	6,420	119,000
Amortization	(34,813)	(24,263)	$ (3,391)
Transfers to solar energy systems, leased and to be leased		(140)
Write-offs and cancellations		(250)
Balance - end of the period	$ 195,244	$ 223,637	$ 129,290