Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues:
Revenue	$ 146,901	$ 174,900	$ 313,253	$ 367,013
Cost of revenues:
Cost of revenues	94,926	109,514	187,631	219,809
Gross profit	51,975	65,386	125,622	147,204
Operating expenses:
Research and development expenses	1,128	1,172	2,004	2,791
Selling and marketing expenses	3,988	4,854	8,264	9,648
General and administrative expenses	18,240	11,870	36,846	28,615
Business interruption insurance income	0	(585)	0	(2,982)
Operating income	28,619	48,075	78,508	109,132
Other income (expense):
Interest income	808	441	1,071	843
Interest expense, net	(18,626)	(19,785)	(37,642)	(37,058)
Derivatives and foreign currency transaction gains (losses)	658	671	(16,208)	1,064
Income attributable to sale of tax benefits	7,420	5,672	13,775	9,804
Other non-operating income (expense), net	(21)	304	(352)	382
Income from operations before income tax and equity in earnings (losses) of investees	18,858	35,378	39,152	84,167
Income tax provision	(4,268)	(11,766)	(7,275)	(29,914)
Equity in earnings (losses) of investees, net	605	1,658	1,147	923
Net income	15,195	25,270	33,024	55,176
Net income attributable to noncontrolling interest	(2,169)	(2,224)	(4,739)	(6,097)
Net income attributable to the Company's stockholders	13,026	23,046	28,285	49,079
Comprehensive income:
Net income	15,195	25,270	33,024	55,176
Other comprehensive income (loss), net of related taxes:
Change in foreign currency translation adjustments	416	921	(1,410)	276
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment	(1,234)	(653)	2,521	(5,408)
Change in unrealized gains or losses in respect of a cross currency swap derivative instrument that qualifies as a cash flow hedge	198	0	(2,600)	0
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax of $0)	9	0	(11)	0
Other changes in comprehensive income	17	12	33	17
Comprehensive income	14,601	25,550	31,557	50,061
Comprehensive income attributable to noncontrolling interest	(2,301)	(2,763)	(4,298)	(6,249)
Comprehensive income attributable to the Company's stockholders	$ 12,300	$ 22,787	$ 27,259	$ 43,812
Earnings per share attributable to the Company's stockholders:
Basic: (in dollars per share)	$ 0.23	$ 0.45	$ 0.51	$ 0.96
Diluted: (in dollars per share)	$ 0.23	$ 0.45	$ 0.50	$ 0.95
Weighted average number of shares used in computation of earnings per share attributable to the Company's stockholders:
Basic (in shares)	55,992	51,043	55,990	51,040
Diluted (in shares)	56,316	51,362	56,502	51,448
Electricity [Member]
Revenues:
Revenue	$ 133,864	$ 128,685	$ 278,852	$ 271,541
Cost of revenues:
Cost of revenues	83,736	71,950	163,587	143,318
Product [Member]
Revenues:
Revenue	7,410	43,701	16,053	91,112
Cost of revenues:
Cost of revenues	5,924	34,709	13,998	71,687
Energy Storage and Management Services [Member]
Revenues:
Revenue	5,627	2,514	18,348	4,360
Cost of revenues:
Cost of revenues	$ 5,266	$ 2,855	$ 10,046	$ 4,804