Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues:
Revenue	$ 158,842	$ 158,947	$ 472,095	$ 525,960
Cost of revenues:
Cost of revenues	95,702	104,917	283,333	324,726
Gross profit	63,140	54,030	188,762	201,234
Operating expenses:
Research and development expenses	1,175	1,490	3,179	4,281
Selling and marketing expenses	2,671	4,076	10,935	13,724
General and administrative expenses	23,554	14,539	60,400	43,154
Business interruption insurance income	(248)	(17,761)	(248)	(20,743)
Operating income	35,988	51,686	114,496	160,818
Other income (expense):
Interest income	519	626	1,590	1,469
Interest expense, net	(22,230)	(21,756)	(59,872)	(58,814)
Derivatives and foreign currency transaction gains (losses)	(21)	1,047	(16,229)	2,111
Income attributable to sale of tax benefits	7,879	7,014	21,654	16,818
Other non-operating income (expense), net	44	961	(308)	1,343
Income from operations before income tax and equity in earnings (losses) of investees	22,179	39,578	61,331	123,745
Income tax provision	(2,048)	(15,361)	(9,323)	(45,275)
Equity in earnings (losses) of investees, net	649	(1,119)	1,796	(196)
Net income	20,780	23,098	53,804	78,274
Net income attributable to noncontrolling interest	(5,878)	(7,419)	(10,617)	(13,516)
Net income attributable to the Company's stockholders	14,902	15,679	43,187	64,758
Comprehensive income:
Net income	20,780	23,098	53,804	78,274
Other comprehensive income (loss), net of related taxes:
Change in foreign currency translation adjustments	(632)	1,321	(2,042)	1,597
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	983	947	3,504	(4,461)
Change in unrealized gains or losses in respect of a cross currency swap derivative instrument that qualifies as a cash flow hedge	(2,694)	(3,548)	(5,294)	(3,548)
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax of $0)	2	0	(9)	0
Other changes in comprehensive income	15	30	48	47
Comprehensive income	18,454	21,848	50,011	71,909
Comprehensive income attributable to noncontrolling interest	(5,553)	(7,751)	(9,851)	(14,000)
Comprehensive income attributable to the Company's stockholders	$ 12,901	$ 14,097	$ 40,160	$ 57,909
Earnings per share attributable to the Company's stockholders:
Basic: (in dollars per share)	$ 0.27	$ 0.31	$ 0.77	$ 1.27
Diluted: (in dollars per share)	$ 0.26	$ 0.31	$ 0.77	$ 1.26
Weighted average number of shares used in computation of earnings per share attributable to the Company's stockholders:
Basic (in shares)	56,003	51,072	55,995	51,051
Diluted (in shares)	56,298	51,282	56,413	51,386
Electricity [Member]
Revenues:
Revenue	$ 142,651	$ 123,660	$ 421,503	$ 395,201
Cost of revenues:
Cost of revenues	81,549	76,670	245,136	219,988
Product [Member]
Revenues:
Revenue	10,527	29,625	26,580	120,737
Cost of revenues:
Cost of revenues	9,182	24,037	23,180	95,724
Energy Storage and Management Services [Member]
Revenues:
Revenue	5,664	5,662	24,012	10,022
Cost of revenues:
Cost of revenues	$ 4,971	$ 4,210	$ 15,017	$ 9,014