BUSINESS SEGMENTS - Summarized Financial Information Concerning Reportable Segments (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) numberOfSegment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jan. 04, 2024 USD ($)
Segment Reporting Information [Line Items]
Net revenues from external customers	$ 879,654	$ 829,424	$ 734,159
Depreciation and amortization expenses	262,863	224,797	198,792
Gross profit	272,619	264,018	268,824
Operating income	172,470	166,585	152,803
Segment assets	5,666,224	5,208,279
Expenditures for long-lived assets	$ 487,678	618,383	563,476
Number of segment, allocation of other segment items | numberOfSegment	2
Goodwill	$ 151,023	90,544	90,325
Enel Green Power North America ("EGPNA")
Segment Reporting Information [Line Items]
Goodwill				$ 60,900
Electricity
Segment Reporting Information [Line Items]
Depreciation and amortization expenses	230,957	199,344	179,966
Expenditures for long-lived assets	375,540	474,592	462,269
Goodwill	146,400	85,900	85,700
Electricity | Accounted for Under ASC 606
Segment Reporting Information [Line Items]
Net revenues from external customers	153,200	124,700	102,500
Product
Segment Reporting Information [Line Items]
Depreciation and amortization expenses	11,693	10,908	7,302
Expenditures for long-lived assets	10,005	20,599	16,352
Goodwill	0	0	0
Energy storage
Segment Reporting Information [Line Items]
Depreciation and amortization expenses	20,213	14,545	11,524
Expenditures for long-lived assets	102,133	123,192	84,855
Goodwill	4,600	4,600	4,600
Energy storage | Accounted for Under ASC 606
Segment Reporting Information [Line Items]
Net revenues from external customers	4,200	0	0
United States
Segment Reporting Information [Line Items]
Net revenues from external customers	557,343	509,827	484,055
Operating segments
Segment Reporting Information [Line Items]
Net revenues from external customers	879,654	829,424	734,159
Depreciation and amortization expenses	248,876	209,173	192,780
Other cost of revenues expenses	358,159	356,233	272,555
Gross profit	272,619	264,018	268,824
Segment operating expenses	100,149	97,433	116,021
Operating income	172,470	166,585	152,803
Segment assets			4,611,579
Operating segments | Electricity
Segment Reporting Information [Line Items]
Net revenues from external customers	702,264	666,767	631,727
Depreciation and amortization expenses	218,252	189,194	173,954
Other cost of revenues expenses	241,274	233,355	206,407
Gross profit	242,738	244,218	251,366
Segment operating expenses	80,832	75,384	95,188
Operating income	161,906	168,834	156,178
Segment assets	4,983,069	4,652,392	4,253,910
Operating segments | Product
Segment Reporting Information [Line Items]
Net revenues from external customers	139,661	133,763	71,414
Depreciation and amortization expenses	10,363	5,358	7,302
Other cost of revenues expenses	103,548	110,444	53,177
Gross profit	25,750	17,961	10,935
Segment operating expenses	15,428	14,425	12,019
Operating income	10,322	3,536	(1,084)
Segment assets	229,687	199,897	118,018
Operating segments | Energy storage
Segment Reporting Information [Line Items]
Net revenues from external customers	37,729	28,894	31,018
Depreciation and amortization expenses	20,262	14,621	11,524
Other cost of revenues expenses	13,336	12,434	12,971
Gross profit	4,131	1,839	6,523
Segment operating expenses	3,889	7,624	8,814
Operating income	242	(5,785)	(2,291)
Segment assets	453,468	355,990	239,651
Operating segments | United States
Segment Reporting Information [Line Items]
Net revenues from external customers	557,343	509,827	484,055
Operating segments | United States | Electricity
Segment Reporting Information [Line Items]
Net revenues from external customers	510,645	473,323	446,000
Operating segments | United States | Product
Segment Reporting Information [Line Items]
Net revenues from external customers	8,969	7,610	7,037
Operating segments | United States | Energy storage
Segment Reporting Information [Line Items]
Net revenues from external customers	37,729	28,894	31,018
Operating segments | Foreign
Segment Reporting Information [Line Items]
Net revenues from external customers	322,311	319,597	250,104
Operating segments | Foreign | Electricity
Segment Reporting Information [Line Items]
Net revenues from external customers	191,619	193,444	185,727
Operating segments | Foreign | Product
Segment Reporting Information [Line Items]
Net revenues from external customers	130,692	126,153	64,377
Operating segments | Foreign | Energy storage
Segment Reporting Information [Line Items]
Net revenues from external customers	0	0	0
Unconsolidated investments
Segment Reporting Information [Line Items]
Segment assets	144,585	125,439	115,693
Unconsolidated investments | Electricity
Segment Reporting Information [Line Items]
Segment assets	144,585	125,439	115,693
Unconsolidated investments | Product
Segment Reporting Information [Line Items]
Segment assets	0	0	0
Unconsolidated investments | Energy storage
Segment Reporting Information [Line Items]
Segment assets	$ 0	$ 0	$ 0