Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues:
Revenue	$ 192,113	$ 199,038
Cost of revenues:
Cost of revenues	110,295	124,859
Gross profit	81,818	74,179
Operating expenses:
Research and development expenses	1,619	900
Selling and marketing expenses	4,794	3,865
General and administrative expenses	14,348	15,689
Operating income	61,057	53,725
Other income (expense):
Interest income	402	293
Interest expense, net	(17,273)	(21,223)
Derivatives and foreign currency transaction gains (losses)	393	472
Income attributable to sale of tax benefits	4,132	7,764
Other non-operating income (expense), net	78	91
Income from operations before income tax and equity in earnings (losses) of investees	48,789	41,122
Income tax (provision) benefit	(18,148)	(14,039)
Equity in earnings (losses) of investees, net	(735)	1,047
Net income	29,906	28,130
Net income attributable to noncontrolling interest	(3,873)	(2,184)
Net income attributable to the Company's stockholders	26,033	25,946
Comprehensive income:
Net income	29,906	28,130
Other comprehensive income (loss), net of related taxes:
Change in foreign currency translation adjustments	(645)	(1,348)
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment	(4,755)	(1,145)
Change in respect of derivative instruments designated for cash flow hedge	13	22
Amortization of unrealized gains in respect of derivative instruments designated for cash flow hedge	(8)	(8)
Comprehensive income	24,511	25,651
Comprehensive income attributable to noncontrolling interest	(3,486)	(1,862)
Comprehensive income attributable to the Company's stockholders	$ 21,025	$ 23,789
Basic:
Net income (in dollars per share)	$ 0.51	$ 0.51
Diluted:
Net income (in dollars per share)	$ 0.51	$ 0.51
Weighted average number of shares used in computation of earnings per share attributable to the Company's stockholders:
Basic (in shares)	51,036	50,709
Diluted (in shares)	51,526	51,012
Electricity [Member]
Revenues:
Revenue	$ 142,856	$ 142,908
Cost of revenues:
Cost of revenues	71,368	77,543
Product [Member]
Revenues:
Revenue	47,411	52,128
Cost of revenues:
Cost of revenues	36,978	42,106
Energy Storage and Management Services [Member]
Revenues:
Revenue	1,846	4,002
Cost of revenues:
Cost of revenues	$ 1,949	$ 5,210