Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Details)

v3.8.0.1
Commitments and Contingencies - Additional Information (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Jan. 31, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Other Commitments [Line Items]        
Letters of credit outstanding, amount   $ 16.4 $ 6.2  
Letter of credit, fee percentage     2.75%  
Capital lease obligations   $ 13.2 $ 23.0  
Photovoltaic Modules        
Other Commitments [Line Items]        
Purchase commitment with suppliers $ 280.6      
Minimum        
Other Commitments [Line Items]        
Letter of credit, fee percentage   2.50%    
Maximum        
Other Commitments [Line Items]        
Letter of credit, fee percentage   3.25%    
Non-cancellable operating leases arrangements        
Other Commitments [Line Items]        
Operating lease expenses   $ 12.5 12.4 $ 7.0
Deferred rent liabilities   $ 2.5 $ 2.9  
Capital lease obligation        
Other Commitments [Line Items]        
Lease obligation interest rates   5.16% 10.00%