LONG-TERM DEBT, CREDIT AGREEMENTS AND COMMERCIAL PAPER - Schedule of Additional Information of Long-Term Debt (Details) $ in Thousands, ₪ in Billions	Dec. 31, 2025 USD ($)	May 14, 2025 USD ($)	Mar. 31, 2025 USD ($)	Mar. 27, 2025 USD ($)	Feb. 02, 2025 USD ($)	Dec. 31, 2024 USD ($)	Sep. 26, 2024 USD ($)	May 22, 2024 USD ($)	Jan. 02, 2024 USD ($)	Jul. 01, 2020 USD ($)	Jul. 01, 2020 ILS (₪)
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,966,700
Limited and non-recourse
Debt Instrument [Line Items]
Long-term debt, gross	739,176					$ 657,315
Limited recourse
Debt Instrument [Line Items]
Long-term debt, gross	692,273					603,006
Nonrecourse
Debt Instrument [Line Items]
Long-term debt, gross	46,903					54,309
Full recourse
Debt Instrument [Line Items]
Long-term debt, gross	1,227,545					$ 988,812
Mammoth Senior Secured Notes 2025 | Limited recourse
Debt Instrument [Line Items]
Debt instrument, face amount	23,400
Long-term debt, gross	$ 23,400
Annual interest rate	6.95%
Geothermie Bouillante tranche 1 | Limited recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 39,200
Long-term debt, gross	$ 35,700
Annual interest rate	1.80%
Geothermie Bouillante tranche 2 | Limited recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 55,700
Long-term debt, gross	$ 56,300
Annual interest rate	2.00%
Dominica Loan | Limited recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 37,600
Long-term debt, gross	$ 37,600
Annual interest rate	2.40%
Bottleneck Loan | Limited recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 72,600
Long-term debt, gross	$ 68,900
Annual interest rate	6.31%
Mammoth Senior Secured Notes | Limited recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 135,100
Long-term debt, gross	$ 120,400
Annual interest rate	6.73%
DFC Loan - Tranche I | Limited recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 85,000
Long-term debt, gross	$ 23,600
Annual interest rate	6.34%
DFC Loan - Tranche II | Limited recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 180,000
Long-term debt, gross	$ 47,600
Annual interest rate	6.29%
DFC Loan - Tranche III | Limited recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 45,000
Long-term debt, gross	$ 13,400
Annual interest rate	6.12%
DFC - Platanares Loan | Limited recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 114,700
Long-term debt, gross	$ 55,300
Annual interest rate	7.02%
Series A | Limited recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 151,700
Long-term debt, gross	$ 48,600
Annual interest rate	4.69%
Series C | Limited recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 140,000
Long-term debt, gross	$ 62,600
Annual interest rate	4.61%
Idaho Refinancing Note | Limited recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 61,600
Long-term debt, gross	$ 52,400
Annual interest rate	6.26%
U.S. Department of Energy | Limited recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 96,800
Long-term debt, gross	$ 24,800
Annual interest rate	2.60%
Prudential Capital Group – Nevada | Limited recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 30,700
Long-term debt, gross	$ 21,700
Annual interest rate	6.75%
Don A. Campbell Senior Secured Notes | Nonrecourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 92,500
Long-term debt, gross	$ 46,900
Annual interest rate	4.03%
Discount 2025 III Loan
Debt Instrument [Line Items]
Debt instrument, face amount	$ 100,000
Discount 2025 III Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	100,000
Long-term debt, gross	$ 100,000
Annual interest rate	2.42%
Discount 2025 II Loan
Debt Instrument [Line Items]
Debt instrument, face amount		$ 50,000
Discount 2025 II Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 50,000
Long-term debt, gross	$ 46,900
Annual interest rate	2.40%
Hapoalim 2025 Loan
Debt Instrument [Line Items]
Debt instrument, face amount			$ 100,000
Hapoalim 2025 Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 150,000
Long-term debt, gross	$ 137,600
Annual interest rate	2.45%
Discount 2025 Loan
Debt Instrument [Line Items]
Debt instrument, face amount				$ 50,000
Discount 2025 Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 50,000
Long-term debt, gross	$ 45,300
Annual interest rate	2.40%
Mizrahi 2025 Loan
Debt Instrument [Line Items]
Debt instrument, face amount					$ 50,000
Mizrahi 2025 Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 50,000
Long-term debt, gross	$ 46,900
Annual interest rate	2.35%
Hapoalim 2024 Loan
Debt Instrument [Line Items]
Debt instrument, face amount									$ 75,000
Hapoalim 2024 Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 75,000
Long-term debt, gross	$ 58,600
Annual interest rate	6.60%
HSBC Bank 2024 Loan
Debt Instrument [Line Items]
Debt instrument, face amount									$ 125,000
HSBC Bank 2024 Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 125,000
Long-term debt, gross	$ 87,500
Annual interest rate	2.25%
Discount 2024 Loan
Debt Instrument [Line Items]
Debt instrument, face amount								$ 31,800
Discount 2024 Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 31,800
Long-term debt, gross	$ 25,800
Annual interest rate	6.75%
Discount 2024 II Loan
Debt Instrument [Line Items]
Debt instrument, face amount							$ 50,000
Discount 2024 II Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 50,000
Long-term debt, gross	$ 42,200
Annual interest rate	2.35%
Mizrahi Loan 2023 | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 50,000
Long-term debt, gross	$ 37,500
Annual interest rate	7.15%
Hapoalim 2023 Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 100,000
Long-term debt, gross	$ 75,000
Annual interest rate	6.45%
Mizrahi Bank Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 75,000
Long-term debt, gross	$ 42,200
Annual interest rate	4.10%
Bank Hapoalim Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 125,000
Long-term debt, gross	$ 44,600
Annual interest rate	3.45%
HSBC Bank Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 50,000
Long-term debt, gross	$ 21,400
Annual interest rate	3.45%
Discount Bank Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 100,000
Long-term debt, gross	$ 50,000
Annual interest rate	2.90%
Senior Unsecured Bonds - Series 4
Debt Instrument [Line Items]
Debt instrument, face amount										$ 289,800	₪ 1.0
Senior Unsecured Bonds - Series 4 | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 289,800
Long-term debt, gross	$ 188,100
Annual interest rate	3.35%
Migdal Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 100,000
Long-term debt, gross	$ 62,300
Annual interest rate	4.80%
Additional Migdal Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 50,000
Long-term debt, gross	$ 31,100
Annual interest rate	4.60%
Second Addendum Migdal Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 50,000
Long-term debt, gross	$ 31,100
Annual interest rate	5.44%
DEG 2 Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 50,000
Long-term debt, gross	$ 12,500
Annual interest rate	6.28%
DEG 3 Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 41,500
Long-term debt, gross	$ 10,900
Annual interest rate	6.04%
DEG 4 Loan | Full recourse
Debt Instrument [Line Items]
Debt instrument, face amount	$ 30,000
Long-term debt, gross	$ 30,000
Annual interest rate	7.79%