LONG-TERM DEBT, CREDIT AGREEMENTS AND FINANCE LIABILITY - Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Financing liability	$ 220,569	$ 225,760
Less current portion	(4,093)	(5,141)
Noncurrent portion	216,476	220,619
Nonrecourse
Debt Instrument [Line Items]
Long-term debt	657,315	512,852
Less current portion	(70,262)	(57,207)
Noncurrent portion	587,053	455,645
Full recourse
Debt Instrument [Line Items]
Long-term debt	988,812	817,737
Less current portion	(161,313)	(116,864)
Noncurrent portion	827,499	700,873
Loan agreement with DFC (the Olkaria III power plant)
Debt Instrument [Line Items]
Long-term debt	102,600
Loan agreement with DFC (the Olkaria III power plant) | Limited recourse
Debt Instrument [Line Items]
Long-term debt	102,520	120,668
Loan agreement with DFC (the Platanares power plant)
Debt Instrument [Line Items]
Long-term debt	63,500
Loan agreement with DFC (the Platanares power plant) | Limited recourse
Debt Instrument [Line Items]
Long-term debt	63,495	71,687
Idaho Refinancing, U.S. Department of Energy and Prudential Capital Group Nevada | Limited recourse
Debt Instrument [Line Items]
Long-term debt	106,420	112,959
OFC 2 Senior Secured Notes
Debt Instrument [Line Items]
Long-term debt	126,900
OFC 2 Senior Secured Notes | Limited recourse
Debt Instrument [Line Items]
Long-term debt	126,859	142,464
Mammoth Senior Secured Notes | Limited recourse
Debt Instrument [Line Items]
Long-term debt	129,245	0
Bottleneck Loan | Limited recourse
Debt Instrument [Line Items]
Long-term debt	72,600	0
Other loans | Limited recourse
Debt Instrument [Line Items]
Long-term debt	1,867	3,460
Don A. Campbell 1 Senior Secured Notes ("DAC 1")
Debt Instrument [Line Items]
Long-term debt	52,200
Don A. Campbell 1 Senior Secured Notes ("DAC 1") | Nonrecourse
Debt Instrument [Line Items]
Long-term debt	52,219	57,397
Other loans | Nonrecourse
Debt Instrument [Line Items]
Long-term debt	2,090	4,216
Senior Unsecured Bonds | Full recourse
Debt Instrument [Line Items]
Long-term debt	192,218	220,568
Senior Unsecured Loan (“Migdal”)
Debt Instrument [Line Items]
Long-term debt	70,600
Senior Unsecured Loan (“Migdal”) | Full recourse
Debt Instrument [Line Items]
Long-term debt	141,200	158,000
Other full recourse loans | Full recourse
Debt Instrument [Line Items]
Long-term debt	592,603	397,009
Loan agreements with DEG | Full recourse
Debt Instrument [Line Items]
Long-term debt	62,792	42,160
Convertible Senior Notes
Debt Instrument [Line Items]
Noncurrent portion	$ 476,437	$ 431,250