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Note 8 - Business Segments (Tables)

6 Months Ended

Jun. 30, 2020

Notes Tables

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

		Electricity				Product				ESMS				Consolidated
		(Dollars in thousands)
Three Months Ended June 30, 2020:
Revenues from external customers:
United States ⁽¹⁾		$	80,427			$	2,269			$	2,514			$	85,210
Foreign⁽²⁾			48,258				41,432				—				89,690
Net revenue from external customers			128,685				43,701				2,514				174,900
Intersegment revenue			—				50,453				—				50,453
Operating income (loss)			45,875				3,803				(1,603	)			48,075
Segment assets at period end ^{(3) (*)}			3,150,770				190,474				77,133				3,418,377
* Including unconsolidated investments			84,414				—				—				84,414

Three Months Ended June 30, 2019:
Revenues from external customers:
United States ⁽¹⁾		$	76,931			$	12,532			$	2,956			$	92,419
Foreign⁽²⁾			52,148				39,498				—				91,646
Net revenue from external customers			129,079				52,030				2,956				184,065
Intersegment revenue			—				19,167				—				19,167
Operating income (loss)			43,475				5,307				(1,902	)			46,880
Segment assets at period end^{(3) (*)}			2,992,891				128,524				72,366				3,193,781
* Including unconsolidated investments			71,047				—				—				71,047

Six Months Ended June 30, 2020:
Revenues from external customers:
United States (1)		$	172,119			$	2,667			$	4,360			$	179,146
Foreign (2)			99,422				88,445				—				187,867
Net revenue from external customers			271,541				91,112				4,360				367,013
Intersegment revenue			—				59,109				—				59,109
Operating income (loss)			104,505				7,675				(3,048	)			109,132
Segment assets at period end (3) (*)			3,150,770				190,474				77,133				3,418,377
* Including unconsolidated investments			84,414				—				—				84,414

Six Months Ended June 30, 2019:
Revenues from external customers:
United States (1)		$	168,459			$	23,775			$	6,958			$	199,192
Foreign (2)			103,528				80,383				—				183,911
Net revenue from external customers			271,987				104,158				6,958				383,103
Intersegment revenue			—				37,428				—				37,428
Operating income (loss)			95,026				9,559				(3,980	)			100,605
Segment assets at period end (3) (*)			2,992,891				128,524				72,366				3,193,781
* Including unconsolidated investments			71,047				—				—				71,047

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

		Three Months Ended June 30,								Six Months Ended June 30,
		2020				2019				2020				2019
		(Dollars in thousands)								(Dollars in thousands)
Revenues:
Total segment revenues		$	174,900			$	184,065			$	367,013			$	383,103
Intersegment revenues			50,453				19,167				59,109				37,428
Elimination of intersegment revenues			(50,453	)			(19,167	)			(59,109	)			(37,428	)
Total consolidated revenues		$	174,900			$	184,065			$	367,013			$	383,103

Operating income:
Operating income		$	48,075			$	46,880			$	109,132			$	100,605
Interest income			441				420				843				713
Interest expense, net			(19,785	)			(21,517	)			(37,058	)			(42,740	)
Derivatives and foreign currency transaction gains (losses)			671				19				1,064				491
Income attributable to sale of tax benefits			5,672				4,637				9,804				12,401
Other non-operating income (expense), net			304				1,027				382				1,118
Total consolidated income before income taxes and equity in income of investees		$	35,378			$	31,466			$	84,167			$	72,588