Quarterly report [Sections 13 or 15(d)]

Long-term Debt - Schedule of Outstanding Non-Recourse Asset-Backed Debt (Details)

v3.25.1
Long-term Debt - Schedule of Outstanding Non-Recourse Asset-Backed Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Financing Receivable, before Allowance for Credit Loss $ 3,015,000 $ 2,946,000
Total assets 7,475,961 7,080,245
Collateral Pledged    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Restricted cash 16,000 20,000
Asset-backed non-recourse debt | Collateral pledged | Collateral Pledged    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Total assets 300,000 307,000
Non-recourse debt    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Debt Issuance Costs, Net (4,000) (4,000)
Long-Term Debt, Total 125,000 132,000
Non-recourse debt | Collateral pledged    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Total assets 300,000 307,000
Non-recourse debt | Asset-backed non-recourse debt | HASI Harmony Issuer [Member]    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Carrying value of Convertible Notes $ 92,000 96,000
Interest rate (as a percent) 6.78%  
Debt Principal Amount Due Upon Maturity $ 0  
Non-recourse debt | Asset-backed non-recourse debt | HASI Harmony Issuer [Member] | Collateral pledged    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Financing Receivable, before Allowance for Credit Loss 261,000 266,000
Non-recourse debt | Other non-recourse debt    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Other non-recourse debt 37,000 40,000
Debt Principal Amount Due Upon Maturity $ 17,000  
Non-recourse debt | Other non-recourse debt | Minimum    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Interest rate (as a percent) 3.15%  
Non-recourse debt | Other non-recourse debt | Maximum    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Interest rate (as a percent) 7.23%  
Non-recourse debt | Other non-recourse debt | Collateral pledged    
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Financing Receivable, before Allowance for Credit Loss $ 39,000 $ 41,000