Quarterly report [Sections 13 or 15(d)]

DEBT AND FINANCING LEASE LIABILITIES - Long-term Debt (Details)

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DEBT AND FINANCING LEASE LIABILITIES - Long-term Debt (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Debt Instrument [Line Items]    
Financing lease liabilities $ 12,655 $ 12,904
Total debt and financing lease liabilities 1,931,010 1,674,187
Less: current maturities 167,083 149,363
Less: unamortized discount and debt issuance costs 47,238 40,924
Long-term debt and financing lease liabilities, net of current portion, unamortized discount and debt issuance costs [1] 1,716,689 1,483,900
Secured Debt | Senior secured corporate term loans    
Debt Instrument [Line Items]    
Long-term debt, gross 96,250 13,000
Secured Debt | Second lien corporate term loan    
Debt Instrument [Line Items]    
Long-term debt, gross 100,000 100,000
Revolving Senior Secured Credit Facility | Line of Credit    
Debt Instrument [Line Items]    
Long-term debt, gross 110,000 135,000
Funds available for borrowing 26,629  
Revolving Credit Facility | Line of Credit | Energy asset construction facilities    
Debt Instrument [Line Items]    
Long-term debt, gross 596,586 339,209
Revolving Credit Facility | Line of Credit | Energy asset operating facilities    
Debt Instrument [Line Items]    
Long-term debt, gross 613,327 674,704
Revolving Credit Facility | Financing Facility | Other financing facilities    
Debt Instrument [Line Items]    
Long-term debt, gross $ 402,192 $ 399,370
[1] Includes restricted assets of consolidated variable interest entities (“VIEs”) at September 30, 2025 and December 31, 2024 of $285,449 and $158,548, respectively. Includes liabilities of consolidated VIEs at September 30, 2025 and December 31, 2024 of $146,082 and $16,871, respectively. See Note 13.