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Lease Pass-Through Financing Obligations - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2015
Property Subject To Or Available For Operating Lease [Line Items]      
Initial lease term 20 years    
Solar energy systems, gross $ 3,038,915 $ 2,837,454  
Depreciation on lease 330,427 303,305  
Maximum percentage to defer a portion of upfront payments     25.00%
Aggregate amount of term loan agreement     $ 25,000
Loan amount 22,600 23,200  
Solar Energy Systems Under Lease Pass-through Fund Arrangements [Member]      
Property Subject To Or Available For Operating Lease [Line Items]      
Solar energy systems, gross 494,700 494,900  
Depreciation on lease $ 55,400 $ 50,800  
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