Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Details)

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Commitments and Contingencies - Additional Information (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Jan. 31, 2015
Dec. 31, 2019
Dec. 31, 2018
Other Commitments [Line Items]      
Letters of credit outstanding, amount   $ 20.1 $ 9.7
Photovoltaic Modules      
Other Commitments [Line Items]      
Purchase commitment $ 78.5    
Letter of Credit | Minimum      
Other Commitments [Line Items]      
Letter of credit, fee percentage   1.25% 2.50%
Letter of Credit | Maximum      
Other Commitments [Line Items]      
Letter of credit, fee percentage   3.25% 3.25%