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Long-Term Debt - Narrative (Details) - USD ($)
1 Months Ended
Feb. 29, 2020
Mar. 31, 2020
Warehouse credit facility    
Debt Instrument [Line Items]    
Borrowing capacity   $ 43,600,000
EZOP | Warehouse credit facility    
Debt Instrument [Line Items]    
Borrowing capacity   $ 31,600,000
SOLI | SOLI Series 2020-1 Class A | Solar asset-backed notes    
Debt Instrument [Line Items]    
Principal amount of debt issued $ 337,100,000  
Discount percent 0.89%  
Stated interest rate 3.35%  
SOLI | SOLI Series 2020-1 Class B | Solar asset-backed notes    
Debt Instrument [Line Items]    
Principal amount of debt issued $ 75,400,000  
Discount percent 0.85%  
Stated interest rate 5.54%  
AP4    
Debt Instrument [Line Items]    
Repayments of debt $ 92,000,000.0  
TEPIIH    
Debt Instrument [Line Items]    
Repayments of debt 226,600,000  
LAPH    
Debt Instrument [Line Items]    
Repayments of debt $ 32,000,000.0  
SEI | 7.75% convertible senior notes    
Debt Instrument [Line Items]    
Stated interest rate   7.75%
Revolving credit facility | TEPH | Line of credit    
Debt Instrument [Line Items]    
Borrowing capacity   $ 6,100,000
Maximum borrowing capacity   $ 400,000,000.0
Revolving credit facility | TEPH | TEPH Class A | Line of credit    
Debt Instrument [Line Items]    
Stated interest rate, increase   0.40%
Revolving credit facility | TEPH | TEPH Class B | Line of credit    
Debt Instrument [Line Items]    
Stated interest rate, increase   0.40%
Revolving credit facility | TEPINV | Line of credit    
Debt Instrument [Line Items]    
Borrowing capacity   $ 6,000,000.0