Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Revenue	[1]	$ 663,084	$ 705,342	$ 746,044
Cost of revenues:
Cost of revenues		398,746	429,067	476,721
Gross profit		264,338	276,275	269,323
Operating expenses:
Research and development expenses		4,129	5,395	4,647
Selling and marketing expenses		15,199	17,384	15,047
General and administrative expenses		75,901	60,226	55,833
Business interruption insurance income		(248)	(20,743)	0
Operating income		169,357	214,013	193,796
Other income (expense):
Interest income		2,124	1,717	1,515
Interest expense, net		(82,658)	(77,953)	(80,384)
Derivatives and foreign currency transaction gains (losses)		(14,720)	3,802	624
Income attributable to sale of tax benefits		29,582	25,720	20,872
Other non-operating income (expense), net		(134)	1,418	880
Income from operations before income tax and equity in earnings (losses) of investees		103,551	168,717	137,303
Income tax provision		(24,850)	(67,003)	(45,613)
Equity in earnings (losses) of investees, net		(2,624)	92	1,853
Net income		76,077	101,806	93,543
Net income attributable to noncontrolling interest		(13,985)	(16,350)	(5,448)
Net income attributable to the Company's stockholders		62,092	85,456	88,095
Comprehensive income:
Net income		76,077	101,806	93,543
Other comprehensive income (loss), net of related taxes:
Change in foreign currency translation adjustments		(3,236)	3,813	(1,810)
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		3,892	(3,975)	(3,417)
Change in unrealized gains or losses in respect of a cross currency swap derivative instrument that qualifies as a cash flow hedge (net of related tax)		2,379	3,366	0
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax)		(40)	0	0
Other changes in comprehensive income		228	274	44
Comprehensive income		79,300	105,284	88,360
Comprehensive income attributable to noncontrolling interest		(12,779)	(17,794)	(5,120)
Comprehensive income attributable to the Company's stockholders		$ 66,521	$ 87,490	$ 83,240
Earnings per share attributable to the Company's stockholders:
Basic: (in dollars per share)		$ 1.11	$ 1.66	$ 1.73
Diluted: (in dollars per share)		$ 1.10	$ 1.65	$ 1.72
Weighted average number of shares used in computation of earnings per share attributable to the Company's stockholders:
Basic (in shares)		56,004	51,567	50,867
Diluted (in shares)		56,402	51,937	51,227
Electricity [Member]
Revenues:
Revenue		$ 585,771	$ 541,393	$ 540,333
Cost of revenues:
Cost of revenues		337,019	300,059	312,835
Product [Member]
Revenues:
Revenue		46,920	148,125	191,009
Cost of revenues:
Cost of revenues		41,374	114,948	145,974
Energy Storage and Management Services [Member]
Revenues:
Revenue		30,393	15,824	14,702
Cost of revenues:
Cost of revenues		$ 20,353	$ 14,060	$ 17,912

[1] Revenues as reported in the geographic area in which they originate.