Lease Pass-Through Financing Obligation - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) Arrangements	Dec. 31, 2014 USD ($)
Property Subject To Or Available For Operating Lease [Line Items]
Number of lease pass-through fund arrangements | Arrangements	8
Initial lease term	20 years
Depreciation on lease	$ 275,158	$ 159,160
Capital lease obligation	39,475	27,791
Current portion of capital lease obligation	8,208	3,430
Solar Energy Systems Under Lease Pass-through Fund Arrangements [Member]
Property Subject To Or Available For Operating Lease [Line Items]
Cost of lease	670,500	540,000
Depreciation on lease	52,800	34,100
Capital lease obligation	89,500	88,700
Current portion of capital lease obligation	$ 34,000	$ 29,200
Service and operational obligation term	5 years
Minimum [Member] | Solar Energy Systems Under Lease Pass-through Fund Arrangements [Member]
Property Subject To Or Available For Operating Lease [Line Items]
Initial lease term	10 years
Maximum [Member] | Solar Energy Systems Under Lease Pass-through Fund Arrangements [Member]
Property Subject To Or Available For Operating Lease [Line Items]
Initial lease term	25 years