Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenues:
Total revenues	$ 989,543	$ 879,654	$ 829,424
Cost of revenues:
Total cost of revenues	716,858	607,035	565,406
Gross profit	272,685	272,619	264,018
Operating expenses:
Research and development expenses	6,304	6,501	7,215
Selling and marketing expenses	18,898	17,694	18,306
General and administrative expenses	79,592	80,119	68,179
Other operating income	(14,844)	(9,375)	0
Impairment of long-lived assets	12,064	1,280	0
Write-off of unsuccessful exploration and storage activities	1,446	3,930	3,733
Operating income	169,225	172,470	166,585
Other income (expense):
Interest income	6,015	7,883	11,983
Interest expense, net	(141,851)	(134,031)	(98,881)
Derivatives and foreign currency transaction gains (losses)	5,248	(4,187)	(3,278)
Income attributable to sale of tax benefits	66,726	73,054	61,157
Other non-operating income, net	385	188	1,519
Income from operations before income tax and equity in earnings (losses) of investees	105,748	115,377	139,085
Income tax (provision) benefit	20,282	16,289	(5,983)
Equity in earnings (losses) of investees	960	(425)	35
Net income	126,990	131,241	133,137
Net income attributable to noncontrolling interest	(3,092)	(7,508)	(8,738)
Net income attributable to the Company's stockholders	123,898	123,733	124,399
Comprehensive income:
Net income	126,990	131,241	133,137
Other comprehensive income (loss), net of related taxes:
Change in foreign currency translation adjustments	9,665	(8,232)	1,257
Change in unrealized gains or (losses) in respect of the Company's share in derivatives instruments of unconsolidated investment that qualifies as a cash flow hedge	(1,230)	602	(470)
Change in unrealized gains or losses in respect of an interest rate swap and cross currency swap derivative instrument that qualifies as a cash flow hedge (net of related tax)			(4,237)
Other changes in comprehensive income	45	50	53
Comprehensive income	133,803	124,662	129,740
Comprehensive income attributable to noncontrolling interest	(5,306)	(6,328)	(9,173)
Comprehensive income attributable to the Company's stockholders	$ 128,497	$ 118,334	$ 120,567
Earnings per share attributable to the Company's stockholders:
Basic (in dollars per share)	$ 2.04	$ 2.05	$ 2.09
Diluted (in dollars per share)	$ 2.02	$ 2.04	$ 2.08
Weighted average number of shares used in computation of earnings per share attributable to the Company's stockholders:
Weighted average number of shares used in computation of earnings per share, basic (in shares)	60,705	60,455	59,424
Weighted average number of shares used in computation of earnings per share, diluted (in shares)	61,362	60,790	59,762
Cross currency swap derivative
Other comprehensive income (loss), net of related taxes:
Change in unrealized gains or losses in respect of an interest rate swap and cross currency swap derivative instrument that qualifies as a cash flow hedge (net of related tax)	$ (1,780)	$ 988	$ (4,237)
Interest rate swap
Other comprehensive income (loss), net of related taxes:
Change in unrealized gains or losses in respect of an interest rate swap and cross currency swap derivative instrument that qualifies as a cash flow hedge (net of related tax)	113	13	0
Electricity
Revenues:
Total revenues	693,900	702,264	666,767
Cost of revenues:
Total cost of revenues	495,989	459,526	422,549
Product
Revenues:
Total revenues	216,686	139,661	133,763
Cost of revenues:
Total cost of revenues	170,671	113,911	115,802
Energy storage
Revenues:
Total revenues	78,957	37,729	28,894
Cost of revenues:
Total cost of revenues	$ 50,198	$ 33,598	$ 27,055