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Lease Pass-Through Financing Obligations - Additional Information (Details) - USD ($)
$ in Thousands
1 Months Ended 9 Months Ended
Jul. 31, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Property Subject To Or Available For Operating Lease [Line Items]        
Initial lease term   20 years    
Solar energy systems, gross   $ 2,646,794   $ 2,091,585
Depreciation on lease   277,634   212,671
Repayment of lease obligations   9,668 $ 2,670  
Maximum percentage to defer a portion of upfront payments     25.00%  
Aggregate amount of term loan agreement     $ 25,000  
Loan amount   23,800   21,800
Asset Backed Securities        
Property Subject To Or Available For Operating Lease [Line Items]        
Solar energy systems, gross   119,700    
Repayment of lease obligations $ 88,900 88,900    
Solar Energy Systems Under Lease Pass-through Fund Arrangements [Member]        
Property Subject To Or Available For Operating Lease [Line Items]        
Solar energy systems, gross   495,100   447,400
Depreciation on lease   $ 46,200   $ 33,500
Solar Energy Systems Under Lease Pass-through Fund Arrangements [Member] | Minimum        
Property Subject To Or Available For Operating Lease [Line Items]        
Initial lease term   20 years    
Solar Energy Systems Under Lease Pass-through Fund Arrangements [Member] | Maximum        
Property Subject To Or Available For Operating Lease [Line Items]        
Initial lease term   25 years