Goodwill and Intangible Assets - Amortization Expense for Identifiable Purchased Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite Lived Intangible Assets [Line Items]
Total amortization expense	$ 34,813	$ 24,263	$ 3,391
Operating leases and solar energy incentives cost of revenue [Member]
Finite Lived Intangible Assets [Line Items]
Total amortization expense	17,428	9,962	582
Solar energy systems and components sales cost of revenue [Member]
Finite Lived Intangible Assets [Line Items]
Total amortization expense	3,337	2,605
Cost of Revenue [Member]
Finite Lived Intangible Assets [Line Items]
Total amortization expense	20,765	12,567	582
Sales and marketing [Member]
Finite Lived Intangible Assets [Line Items]
Total amortization expense	$ 14,048	$ 11,696	$ 2,809