Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenues:
Total revenues	$ 234,018	$ 212,963	$ 463,780	$ 437,129
Cost of revenues:
Total cost of revenues	177,123	151,577	333,958	296,933
Gross profit	56,895	61,386	129,822	140,196
Operating expenses:
Research and development expenses	1,439	1,730	3,981	3,294
Selling and marketing expenses	4,370	4,167	8,542	9,293
General and administrative expenses	19,786	18,026	37,695	37,563
Other operating income	(4,269)	0	(7,394)	0
Impairment of long-lived assets	0	957	0	957
Write-off of unsuccessful exploration and storage activities	251	1,379	767	1,379
Operating income	35,318	35,127	86,231	87,710
Other income (expense):
Interest income	1,929	2,604	3,242	4,443
Interest expense, net	(36,682)	(33,716)	(71,155)	(64,684)
Derivatives and foreign currency transaction gains (losses)	5,068	(332)	7,128	(1,914)
Income attributable to sale of tax benefits	16,251	15,798	33,822	33,274
Other non-operating income, net	76	74	298	100
Income from operations before income tax and equity in earnings of investees	21,960	19,555	59,566	58,929
Income tax (provision) benefit	5,466	3,178	9,261	3,325
Equity in earnings of investees	773	1,232	406	2,061
Net income	28,199	23,965	69,233	64,315
Net income attributable to noncontrolling interest	(153)	(1,722)	(825)	(3,485)
Net income attributable to the Company's stockholders	28,046	22,243	68,408	60,830
Comprehensive income:
Net income	28,199	23,965	69,233	64,315
Other comprehensive income (loss), net of related taxes:
Change in foreign currency translation adjustments	7,547	(266)	10,308	(2,429)
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of an unconsolidated investment that qualifies as a cash flow hedge	(214)	429	(1,110)	939
Other changes in comprehensive income	11	(28)	23	25
Total other comprehensive income (loss), net of related taxes:	8,435	(1,013)	6,334	(986)
Comprehensive income	36,634	22,952	75,567	63,329
Comprehensive income attributable to noncontrolling interest	(1,475)	(1,620)	(2,725)	(2,921)
Comprehensive income attributable to the Company's stockholders	$ 35,159	$ 21,332	$ 72,842	$ 60,408
Earnings per share attributable to the Company's stockholders:
Earnings per share, basic (US Dollar per share)	$ 0.46	$ 0.37	$ 1.13	$ 1.01
Earnings per share, diluted (US Dollar per share)	$ 0.46	$ 0.37	$ 1.12	$ 1.00
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 basic earnings per share	60,689	60,451	60,624	60,419
Weighted average number of shares used in computation of diluted earnings per share	61,019	60,755	60,973	60,655
Cross currency swap
Other comprehensive income (loss), net of related taxes:
Change in unrealized gains or losses in respect of a cross currency swap / interest rate swap derivative instrument that qualifies as a cash flow hedge	$ 1,324	$ (1,189)	$ (2,142)	$ (628)
Interest rate swap
Other comprehensive income (loss), net of related taxes:
Change in unrealized gains or losses in respect of a cross currency swap / interest rate swap derivative instrument that qualifies as a cash flow hedge	(233)	41	(745)	1,107
Electricity
Revenues:
Total revenues	159,912	166,226	340,153	357,479
Cost of revenues:
Total cost of revenues	121,236	110,515	241,069	227,245
Product
Revenues:
Total revenues	59,612	37,829	91,381	62,661
Cost of revenues:
Total cost of revenues	43,118	32,662	67,802	53,816
Energy Storage
Revenues:
Total revenues	14,494	8,908	32,246	16,989
Cost of revenues:
Total cost of revenues	$ 12,769	$ 8,400	$ 25,087	$ 15,872