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Note 9 - Business Segments (Tables)

6 Months Ended

Jun. 30, 2013

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

	Electricity		Product		Consolidated
	(Dollars in thousands)
Three Months Ended June 30, 2013:
Net revenues from external customers	$	87,713	$	64,966	$	152,679
Intersegment revenues		-		18,821		18,821
Operating income		22,639		15,223		37,862
Segment assets at period end *		2,039,219		98,681		2,137,900
* Including unconsolidated investments		3,524		-		3,524
Three Months Ended June 30, 2012:
Net revenues from external customers	$	81,882	$	44,826	$	126,708
Intersegment revenues		-		8,941		8,941
Operating income		16,567		7,816		24,383
Segment assets at period end *		2,204,421		89,679		2,294,100
* Including unconsolidated investments		2,438		1,345		3,783
Six Months Ended June 30, 2013:
Net revenues from external customers	$	156,011	$	115,574	$	271,585
Intersegment revenues		-		25,402		25,402
Operating income		21,325		24,221		45,546
Segment assets at period end *		2,039,219		98,681		2,137,900
* Including unconsolidated investments		3,524		-		3,524
Six Months Ended June 30, 2012:
Net revenues from external customers	$	161,225	$	94,931	$	256,156
Intersegment revenues		-		21,907		21,907
Operating income		31,365		17,683		49,048
Segment assets at period end *		2,204,421		89,679		2,294,100
* Including unconsolidated investments		2,438		1,345		3,783

Reconciliation of Revenue and Operating Income from Segments to Consolidated [Text Block]

	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
	(Dollars in thousands)						(Dollars in thousands)
Operating income	$	37,862		$	24,383		$	45,546		$	49,048
Interest income		87			336			128			724
Interest expense, net		(17,504	)		(14,263	)		(33,367	)		(29,141	)
Foreign currency translation and transaction gains (losses)		904			(1,756	)		2,586			(1,742	)
Income attributable to sale of tax benefits		5,783			2,589			9,315			5,106
Other non-operating income, net		29			286			1,446			122
Total income, before income taxes, discontinued operations and equity in income (losses) of investees	$	27,161		$	11,575		$	25,654		$	24,117

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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