Annual report pursuant to Section 13 and 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) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Dec. 31, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Current assets:          
Cash $ 202,525 $ 202,525 $ 206,364 $ 203,864 $ 152,154
Restricted cash 39,265 39,265 11,882    
Accounts receivable, net 76,198 76,198 60,258    
Prepaid expenses and other current assets 9,202 9,202 9,802    
Total current assets 432,702 432,702 369,345    
Solar energy systems, net 3,319,708 3,319,708 2,629,366    
Other assets 37,225 37,225 34,936    
Total assets (1) 3,927,874 3,927,874 3,572,818    
Current liabilities:          
Accounts payable 115,193 115,193 66,018    
Distributions payable to noncontrolling interests and redeemable noncontrolling interests 13,583 13,583 10,654    
Accrued expenses and other liabilities 85,639 85,639 59,261    
Deferred revenue, current portion 77,310 77,310 70,849    
Deferred grants, current portion 8,269 8,269 8,011    
Non-recourse debt, current portion 21,529 21,529 14,153    
Total current liabilities 335,031 335,031 244,784    
Deferred revenue, net of current portion 584,427 584,427 583,401    
Deferred grants, net of current portion 228,603 228,603 226,893    
Non-recourse debt, net of current portion 1,026,416 1,026,416 639,870    
Other liabilities 13,520 13,520 5,457    
Total liabilities (1) [1] 2,638,063 2,638,063 2,510,725    
Acquisition and derecognition of noncontrolling interests, net of taxes   9,408      
Variable Interest Entities          
Current assets:          
Cash 118,352 118,352 120,728    
Restricted cash 2,699 2,699 1,680    
Accounts receivable, net 30,200 30,200 20,771    
Prepaid expenses and other current assets 917 917 242    
Total current assets 152,168 152,168 143,421    
Solar energy systems, net 2,385,329 2,385,329 1,920,330    
Other assets 3,679 3,679 1,481    
Total assets (1) 2,541,176 2,541,176 2,065,232    
Current liabilities:          
Accounts payable 15,929 15,929 14,873    
Distributions payable to noncontrolling interests and redeemable noncontrolling interests 13,526 13,526 10,654    
Accrued expenses and other liabilities 3,048 3,048 782    
Deferred revenue, current portion 28,240 28,240 25,827    
Deferred grants, current portion 1,021 1,021 3,644    
Non-recourse debt, current portion 11,178 11,178 8,616    
Total current liabilities 72,942 72,942 64,396    
Deferred revenue, net of current portion 380,283 380,283 396,858    
Deferred grants, net of current portion 29,385 29,385 105,390    
Non-recourse debt, net of current portion 190,106 190,106 50,367    
Other liabilities 1,848 1,848 0    
Total liabilities (1) 674,564 674,564 $ 617,011    
VIE, cash consideration $ 35,400        
Additional Paid-In Capital          
Current liabilities:          
Acquisition and derecognition of noncontrolling interests, net of taxes   7,057      
Additional Paid-In Capital | Variable Interest Entities          
Current liabilities:          
Acquisition and derecognition of noncontrolling interests, net of taxes   $ 7,057      
[1] The Company’s consolidated assets as of December 31, 2017 and 2016 include $2,541,176 and $2,065,232, respectively, in assets of variable interest entities, or “VIEs”, that can only be used to settle obligations of the VIEs. Solar energy systems, net, as of December 31, 2017 and 2016 were $2,385,329 and $1,920,330, respectively; cash as of December 31, 2017 and 2016 were $118,352 and $120,728, respectively; restricted cash as of December 31, 2017 and 2016 were $2,699 and $1,680, respectively; accounts receivable, net as of December 31, 2017 and 2016 were $30,200 and $20,771, respectively; prepaid expenses and other current assets as of December 31, 2017 and 2016 were $917 and $242, respectively and other assets as of December 31, 2017 and 2016 were $3,679 and $1,481, respectively. The Company’s consolidated liabilities as of December 31, 2017 and 2016 include $674,564 and $617,011, respectively, in liabilities of VIEs whose creditors have no recourse to the Company. These liabilities include accounts payable as of December 31, 2017 and 2016 of $15,929 and $14,873, respectively; distributions payable to noncontrolling interests and redeemable noncontrolling interests as of December 31, 2017 and 2016 of $13,526 and $10,654, respectively; accrued expenses and other liabilities as of December 31, 2017 and 2016 of $4,896 and $782, respectively; deferred revenue as of December 31, 2017 and 2016 of $408,523 and $422,685, respectively; deferred grants as of December 31, 2017 and 2016 of $30,406 and $109,034, respectively; and non-recourse debt as of December 31, 2017 and 2016 of $201,284 and $58,983, respectively.