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Note 9 - Business Segments (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

		Electricity				Product				Energy Storage				Consolidated
		(Dollars in thousands)
Three Months Ended September 30, 2021:
Revenues from external customers:
United States ⁽¹⁾		$	98,550			$	1,541			$	5,664			$	105,755
Foreign⁽²⁾			44,101				8,986				—				53,087
Net revenue from external customers			142,651				10,527				5,664				158,842
Intersegment revenues ⁽⁴⁾			—				14,147				—				—
Operating income (loss)			38,409				(1,115	)			(1,306	)			35,988
Segment assets at period end ^{(3) (*)}			4,064,679				125,167				169,520				4,359,366
* Including unconsolidated investments			109,725				—				—				109,725

Three Months Ended September 30, 2020:
Revenues from external customers:
United States ⁽¹⁾		$	73,180			$	435			$	5,662			$	79,277
Foreign⁽²⁾			50,480				29,190				—				79,670
Net revenue from external customers			123,660				29,625				5,662				158,947
Intersegment revenues ⁽⁴⁾			—				36,839				—				—
Operating income (loss)			50,847				1,285				(446	)			51,686
Segment assets at period end⁽³⁾^(*)			3,236,631				148,106				136,210				3,520,947
* Including unconsolidated investments			91,277				—				—				91,277

Nine Months Ended September 30, 2021:
Revenues from external customers:
United States ⁽¹⁾		$	285,090			$	4,041			$	24,012			$	313,143
Foreign ⁽²⁾			136,413				22,539				—				158,952
Net revenue from external customers			421,503				26,580				24,012				472,095
Intersegment revenues ⁽⁴⁾			—				90,519				—				—
Operating income (loss)			116,176				(2,753	)			1,073				114,496
Segment assets at period end⁽³⁾ ^(*)			4,064,679				125,167				169,520				4,359,366
* Including unconsolidated investments			109,725				—				—				109,725

Nine Months Ended September 30, 2020:
Revenues from external customers:
United States ⁽¹⁾		$	245,299			$	1,412			$	10,022			$	256,733
Foreign ⁽²⁾			149,902				119,325				—				269,227
Net revenue from external customers			395,201				120,737				10,022				525,960
Intersegment revenues ⁽⁴⁾			—				95,948				—				—
Operating income (loss)			155,352				8,960				(3,494	)			160,818
Segment assets at period end ⁽³⁾ ^(*)			3,236,631				148,106				136,210				3,520,947
* Including unconsolidated investments			91,277				—				—				91,277

Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]

		Three Months Ended September 30,								Nine Months Ended September 30,
		2021				2020				2021				2020
		(Dollars in thousands)								(Dollars in thousands)
Revenues:
Total segment revenues		$	158,842			$	158,947			$	472,095			$	525,960
Intersegment revenues			14,147				36,839				90,519				95,948
Elimination of intersegment revenues			(14,147	)			(36,839	)			(90,519	)			(95,948	)
Total consolidated revenues		$	158,842			$	158,947			$	472,095			$	525,960

Operating income:
Operating income		$	35,988			$	51,686			$	114,496			$	160,818
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
Total consolidated income before income taxes and equity in income of investees		$	22,179			$	39,578			$	61,331			$	123,745