Quarterly report pursuant to Section 13 or 15(d)

Solar Energy Systems, net (Details)

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Solar Energy Systems, net (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Property Subject to or Available for Operating Lease [Line Items]    
Solar energy systems $ 3,996,770 $ 3,441,797
Less: accumulated depreciation and amortization (498,797) (399,280)
Add: construction-in-progress 120,152 119,053
Total solar energy systems, net 3,618,125 3,161,570
Solar energy system equipment costs    
Property Subject to or Available for Operating Lease [Line Items]    
Solar energy systems 3,622,735 3,124,407
Inverters    
Property Subject to or Available for Operating Lease [Line Items]    
Solar energy systems $ 374,035 $ 317,390