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Sale of Bright Canyon Energy (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Jan. 31, 2024
Aug. 04, 2023
Feb. 11, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Gain on sale relating to BCE $ 6,423 $ 0 $ 0      
Bridge Loan | Equity Bridge Loan Facility | Bright Canyon Energy Corporation            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Debt instrument, face amount         $ 31,000 $ 31,000
Term Loan | Non-Recourse Construction Term Loan Facility | Bright Canyon Energy Corporation            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Debt instrument, face amount           $ 36,000
Discontinued Operations, Disposed of by Sale | Bright Canyon Energy Corporation            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Consideration received         $ 44,000  
Gain on sale relating to BCE 6,000          
Assets held-for-sale 35,000          
Discontinued Operations, Disposed of by Sale | Bright Canyou Energy Corportion | Ameresco, Inc.            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Note receivable, net book value $ 28,000          
Discontinued Operations, Disposed of by Sale | Bright Canyou Energy Corportion | Subsequent Event            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Investment tax credits       $ 28,000