Segment Information (Tables)

12 Months Ended

Dec. 31, 2015

Segment Reporting [Abstract]

Revenues Gross Profit And Operating Income By Segment [Table Text Block]

Revenues, gross profit, and operating income associated with our segments were as follows:

	Year Ended December 31,
	2015			2014			2013
	(in thousands)
Revenues
Electricity	$	820,306		$	771,857		$	825,391
Gas	543,805			599,091			570,450
Water	519,422			576,668			542,184
Total Company	$	1,883,533		$	1,947,616		$	1,938,025
Gross profit
Electricity	$	225,446		$	200,249		$	219,852
Gas	185,559			211,623			207,577
Water	145,680			202,178			187,339
Total Company	$	556,685		$	614,050		$	614,768
Operating income (loss)
Electricity	$	31,104		$	(77,751	)	$	(237,279	)
Gas	67,471			76,101			82,176
Water	19,864			71,356			62,015
Corporate unallocated	(65,593		)	(69,226		)	(46,775		)
Total Company	52,846			480			(139,863		)
Total other income (expense)	(15,744		)	(18,745		)	(13,537		)
Income (loss) before income taxes	$	37,102		$	(18,265	)	$	(153,400	)

Revenues By Region [Table Text Block]

Revenues by region were as follows:

	Year Ended December 31,
	2015		2014		2013
	(in thousands)
United States and Canada	$	997,293	$	875,796	$	848,951
Europe, Middle East, and Africa (EMEA)	701,301		849,841		849,464
Other	184,939		221,979		239,610
Total Company	$	1,883,533	$	1,947,616	$	1,938,025

Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block]

Property, plant, and equipment, net, by geographic area were as follows:

	At December 31,
	2015		2014
	(in thousands)
United States	$	72,179	$	76,130
Outside United States	118,077		131,022
Total Company	$	190,256	$	207,152

Depreciation And Amortization Expense Associated With Segments [Table Text Block]

Depreciation and amortization expense associated with our segments was as follows:

	Year Ended December 31,
	2015		2014		2013
	(in thousands)
Electricity	$	35,896	$	47,889	$	46,510
Gas	20,288		25,706		27,671
Water	19,459		24,257		24,818
Corporate Unallocated	350		287		247
Total Company	$	75,993	$	98,139	$	99,246