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Outstanding Loans and Security Agreements - Non-recourse Debt Facilities Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
Nov. 30, 2021
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2021
Dec. 31, 2015
Dec. 31, 2012
Debt Instrument [Line Items]            
Unpaid Principal Balance   $ 534,895 $ 539,669      
Senior Secured Notes | 3.04% Senior Secured Notes due June 2031            
Debt Instrument [Line Items]            
Interest rate percentage     3.04%      
Senior Secured Notes | 6.07% Senior Secured Notes due March 2030            
Debt Instrument [Line Items]            
Interest rate percentage   6.07% 6.07%      
Unpaid Principal Balance   $ 72,852 $ 73,955      
Senior Secured Notes | PPA Company 5 | 3.04% Senior Secured Notes due June 2031            
Debt Instrument [Line Items]            
Interest rate percentage 3.04%          
Debt face amount $ 136,000          
Unpaid Principal Balance 109,100          
Accrued interest 100          
Financing fees 11,500          
Debt instrument, unamortized premium 6,500          
Debt other issuance costs, net 2,100          
Proceeds from debt, net of issuance costs $ 6,700          
Debt minimum debt service reserves required   8,000        
Senior Secured Notes | PPA Company IIIA | 7.5% Term Loan due September 2028            
Debt Instrument [Line Items]            
Interest rate percentage           7.50%
Debt face amount           $ 46,800
Debt minimum debt service reserves required   3,600 $ 3,600      
Senior Secured Notes | PPA Company 4 | 6.07% Senior Secured Notes due March 2030            
Debt Instrument [Line Items]            
Interest rate percentage         6.07%  
Debt minimum debt service reserves required   $ 9,200   $ 9,100    
Term Loan | LIBOR + 2.5% Term Loan due December 2021 | LIBOR            
Debt Instrument [Line Items]            
LIBOR margin (as a percentage)   2.50%        
Term Loan | 7.5% Term Loan due September 2028            
Debt Instrument [Line Items]            
Interest rate percentage   7.50% 7.50%      
Unpaid Principal Balance   $ 30,213 $ 31,070