Quarterly report pursuant to Section 13 or 15(d)

VIE Arrangements - Carrying Amounts and Classification of the VIEs' Assets and Liabilities Included in the Consolidated Balance Sheets (Details)

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VIE Arrangements - Carrying Amounts and Classification of the VIEs' Assets and Liabilities Included in the Consolidated Balance Sheets (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
USD ($)
Sep. 30, 2019
USD ($)
InvestmentFund
fund
Sep. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Current assets:          
Cash $ 324,698 $ 324,698 $ 242,936 $ 226,625 $ 202,525
Restricted cash 48,566 48,566   77,626  
Accounts receivable, net 75,352 75,352   66,435  
Prepaid expenses and other current assets 8,847 8,847   8,563  
Total current assets 567,240 567,240   461,413  
Solar energy systems, net 4,333,387 4,333,387   3,820,017  
Other assets 398,278 398,278   335,685  
Total assets [1] 5,472,018 5,472,018   4,749,787  
Current liabilities:          
Accounts payable 169,893 169,893   131,278  
Distributions payable to noncontrolling interests and redeemable noncontrolling interests 16,808 16,808   15,847  
Accrued expenses and other liabilities 121,720 121,720   98,636  
Deferred revenue, current portion 61,336 61,336   47,407  
Deferred grants, current portion 7,957 7,957   7,885  
Non-recourse debt, current portion 29,402 29,402   35,484  
Total current liabilities 429,012 429,012   372,191  
Deferred revenue, net of current portion 651,727 651,727   544,218  
Deferred grants, net of current portion 214,411 214,411   221,739  
Non-recourse debt, net of current portion 1,776,872 1,776,872   1,466,438  
Other liabilities 166,873 166,873   48,210  
Total liabilities [1] 3,889,830 $ 3,889,830   3,340,703  
Number of pass-through Fund arrangements | InvestmentFund   3      
Payments to acquire interest in VIEs   $ (4,600) $ 0    
Acquisition of Variable Interest Entity (1,268) 3,721      
Additional Paid-In Capital          
Current liabilities:          
Acquisition of Variable Interest Entity   (1,077)      
Variable Interest Entities          
Current assets:          
Cash 178,289 178,289   105,494  
Restricted cash 4,544 4,544   2,071  
Accounts receivable, net 19,208 19,208   18,539  
Prepaid expenses and other current assets 549 549   387  
Total current assets 202,590 202,590   126,491  
Solar energy systems, net 3,045,779 3,045,779   2,712,377  
Other assets 83,830 83,830   66,427  
Total assets 3,332,199 3,332,199   2,905,295  
Current liabilities:          
Accounts payable 14,464 14,464   12,136  
Distributions payable to noncontrolling interests and redeemable noncontrolling interests 16,466 16,466   15,797  
Accrued expenses and other liabilities 9,676 9,676   7,122  
Deferred revenue, current portion 35,169 35,169   29,102  
Deferred grants, current portion 1,014 1,014   982  
Non-recourse debt, current portion 5,257 5,257   4,217  
Total current liabilities 82,046 82,046   69,356  
Deferred revenue, net of current portion 410,872 410,872   367,818  
Deferred grants, net of current portion 27,316 27,316   28,247  
Non-recourse debt, net of current portion 190,856 190,856   186,494  
Other liabilities 23,898 23,898   8,843  
Total liabilities $ 734,988 $ 734,988   $ 660,758  
Number of pass-through Fund arrangements | fund   6      
Payments to acquire interest in VIEs   $ (4,600)      
Variable Interest Entities | Additional Paid-In Capital          
Current liabilities:          
Acquisition of Variable Interest Entity   $ 1,100      
[1]
The Company’s consolidated assets as of September 30, 2019 and December 31, 2018 include $3,332,199 and $2,905,295, respectively, in assets of variable interest entities (“VIEs”) that can only be used to settle obligations of the VIEs. These assets include solar energy systems, net, as of September 30, 2019 and December 31, 2018 of $3,045,779 and $2,712,377, respectively; cash as of September 30, 2019 and December 31, 2018 of $178,289 and $105,494, respectively; restricted cash as of September 30, 2019 and December 31, 2018 of $4,544 and $2,071, respectively; accounts receivable, net as of September 30, 2019 and December 31, 2018 of $19,208 and $18,539, respectively; prepaid expenses and other current assets as of September 30, 2019 and December 31, 2018 of $549 and $387, respectively; and other assets as of September 30, 2019 and December 31, 2018 of $83,830 and $66,427, respectively. The Company’s consolidated liabilities as of September 30, 2019 and December 31, 2018 include $734,988 and $660,758, respectively, in liabilities of VIEs whose creditors have no recourse to the Company. These liabilities include accounts payable as of September 30, 2019 and December 31, 2018 of $14,464 and $12,136, respectively; distributions payable to noncontrolling interests and redeemable noncontrolling interests as of September 30, 2019 and December 31, 2018 of $16,466 and $15,797, respectively; accrued expenses and other current liabilities as of September 30, 2019 and December 31, 2018 of $9,676 and $7,122, respectively; deferred revenue as of September 30, 2019 and December 31, 2018 of $446,041 and $396,920, respectively; deferred grants as of September 30, 2019 and December 31, 2018 of $28,330 and $29,229, respectively; non-recourse debt as of September 30, 2019 and December 31, 2018 of $196,113 and $190,711, respectively; and other liabilities as of September 30, 2019 and December 31, 2018 of $23,898 and $8,843, respectively.