Annual report pursuant to Section 13 and 15(d)

Lease Pass-Through Financing Obligations - Additional Information (Details)

v3.8.0.1
Lease Pass-Through Financing Obligations - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Property Subject to or Available for Operating Lease [Line Items]      
Initial lease term 20 years    
Solar energy systems, gross $ 3,622,005 $ 2,837,454  
Depreciation on lease $ 421,350 303,305  
Discount on expected remaining lease payments 5.00%    
Repayment of lease obligations $ 9,836 12,759 $ 4,854
Maximum percentage to defer a portion of upfront payments     25.00%
Loan amount 20,500 23,200  
Asset Backed Securities      
Property Subject to or Available for Operating Lease [Line Items]      
Repayment of lease obligations 88,900    
Solar energy systems under lease pass-through fund arrangements      
Property Subject to or Available for Operating Lease [Line Items]      
Solar energy systems, gross 491,900 494,900  
Depreciation on lease $ 68,500 $ 50,800  
Solar energy systems under lease pass-through fund arrangements | 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 | Maximum      
Property Subject to or Available for Operating Lease [Line Items]      
Initial lease term 25 years