Annual report pursuant to Section 13 and 15(d)

Long-term Debt - Outstanding Non-Recourse Asset-Backed Debt and Bank Loans (Details)

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Long-term Debt - Outstanding Non-Recourse Asset-Backed Debt and Bank Loans (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Unamortized financing costs $ (9,000) $ (10,000)
Total non-recourse debt 433,000 430,000
Receivables 1,990,000  
Total assets 4,760,148 4,148,311
Collateral Pledged    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Restricted cash 20,000 19,000
Asset-Backed Non-recourse Debt | Pledged    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Total assets 632,000 592,000
Asset-Backed Non-recourse Debt | HASI Sustainable Yield Bond 2015-1A    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Carrying value of Senior Unsecured Notes $ 73,000 77,000
Interest Rate 4.28%  
Anticipated Balance at Maturity $ 0  
Asset-Backed Non-recourse Debt | HASI Sustainable Yield Bond 2015-1A | Pledged    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Receivables 136,000 139,000
Asset-Backed Non-recourse Debt | HASI SYB Trust 2016-2    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Carrying value of Senior Unsecured Notes $ 56,000 62,000
Interest Rate 4.35%  
Anticipated Balance at Maturity $ 0  
Asset-Backed Non-recourse Debt | HASI SYB Trust 2016-2 | Pledged    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Receivables 63,000 70,000
Asset-Backed Non-recourse Debt | HASI SYB Trust 2017-1    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Carrying value of Senior Unsecured Notes $ 141,000 146,000
Interest Rate 3.86%  
Anticipated Balance at Maturity $ 0  
Asset-Backed Non-recourse Debt | HASI SYB Trust 2017-1 | Pledged    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Receivables 231,000 208,000
Asset-Backed Non-recourse Debt | Lannie Mae Series 2019-1    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Carrying value of Senior Unsecured Notes $ 90,000 93,000
Interest Rate 3.68%  
Anticipated Balance at Maturity $ 0  
Asset-Backed Non-recourse Debt | Lannie Mae Series 2019-1 | Pledged    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Receivables 120,000 110,000
Other Non-recourse Debt    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Other non-recourse debt 82,000 62,000
Anticipated Balance at Maturity 18,000  
Other Non-recourse Debt | Pledged    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Receivables $ 82,000 $ 65,000
Other Non-recourse Debt | Minimum    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Interest Rate 3.15%  
Other Non-recourse Debt | Maximum    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Interest Rate 7.45%