v3.26.1
Debt - Schedule of Credit Facilities and Loan Agreements (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Dec. 24, 2025
Jul. 30, 2024
Debt Instrument [Line Items]        
Total debt $ 1,370,405 $ 1,298,612    
Less: Total unamortized discount and deferred financing costs (25,103) (26,785)    
Less: Current portion of long-term debt (25,125) (24,056)    
Total long-term debt, net 1,320,177 1,247,771    
Unamortized debt discount and deferred financing fees, current 5,400 4,500    
Current portion of long-term debt, gross (30,500) (28,600)    
Trillium Manager LLC | Construction, Revolving and Term Loans        
Debt Instrument [Line Items]        
Total debt 61,614 62,975    
Greenbacker Wind Holdings II LLC | Loans Payable        
Debt Instrument [Line Items]        
Total debt $ 62,708 64,414    
Basis spread on variable rate (in percent) 2.15%      
Conic Manager LLC | Loans Payable        
Debt Instrument [Line Items]        
Total debt $ 20,734 21,076    
Basis spread on variable rate (in percent) 1.75%      
Greenbacker Renewable Energy Corporation (Premium financing agreement) | Premium Financing Loan        
Debt Instrument [Line Items]        
Total debt $ 349 1,699    
Interest rate 7.15%      
Gemstone 2025 Manager LLC | Loans Payable        
Debt Instrument [Line Items]        
Total debt $ 51,860 52,502    
Basis spread on variable rate (in percent) 2.25%      
GB Solar TE 2020 Manager LLC | Secured Debt        
Debt Instrument [Line Items]        
Total debt $ 13,406 13,688    
Basis spread on variable rate (in percent) 2.10%      
Sego Lily Solar Manager LLC | Secured Debt        
Debt Instrument [Line Items]        
Total debt $ 118,347 121,488    
Basis spread on variable rate (in percent) 1.53%      
GRP II Borealis Solar LLC | Secured Debt        
Debt Instrument [Line Items]        
Total debt $ 38,184 38,752    
Basis spread on variable rate (in percent) 2.50%      
Ponderosa Manager LLC | Construction Loan        
Debt Instrument [Line Items]        
Total debt $ 85,363 85,363    
Basis spread on variable rate (in percent) 1.40%      
PRC Nemasket LLC | Loans Payable        
Debt Instrument [Line Items]        
Total debt $ 34,797 37,486    
Basis spread on variable rate (in percent) 1.25%      
GREC Holdings 1 LLC | Line of Credit | Revolving Credit Facility        
Debt Instrument [Line Items]        
Total debt $ 62,600 67,600    
GREC Holdings 1 LLC | Line of Credit | Revolving Credit Facility | Minimum        
Debt Instrument [Line Items]        
Basis spread on variable rate (in percent) 1.85%      
GREC Holdings 1 LLC | Line of Credit | Revolving Credit Facility | Maximum        
Debt Instrument [Line Items]        
Basis spread on variable rate (in percent) 2.10%      
GREC Warehouse Holdings I LLC | Line of Credit | Revolving Credit Facility        
Debt Instrument [Line Items]        
Total debt $ 79,906 89,179    
Basis spread on variable rate (in percent) 2.28%      
Cider Solar Construction Owner LLC | Loans Payable        
Debt Instrument [Line Items]        
Total debt $ 0 81,000    
Interest rate     14.00% 9.75%
Cider Solar Construction Owner LLC | Loans Payable | Minimum        
Debt Instrument [Line Items]        
Interest rate 12.25%      
Cider Solar Construction Owner LLC | Loans Payable | Maximum        
Debt Instrument [Line Items]        
Interest rate 14.00%      
Cider Solar Manager LLC | Loans Payable        
Debt Instrument [Line Items]        
Total debt $ 666,078 485,645    
Pemaquid Manager LLC | Loans Payable        
Debt Instrument [Line Items]        
Total debt $ 74,459 $ 75,745    
Basis spread on variable rate (in percent) 1.85%