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Goodwill Schedule of Goodwill Allocated to Reporting Segments (Tables)
 12 Months Ended
Dec. 31, 2013
Goodwill [Line Items]  
Schedule of Goodwill [Table Text Block]
The following table reflects goodwill allocated to each reporting segment at December 31, 2013 and 2012:

 
Electricity
 
Gas
 
Water
 
Total Company
 
(in thousands)
Goodwill balance at January 1, 2012
 
 
 
 
 
 
 
Goodwill before impairment
$
436,576

 
$
372,025

 
$
413,156

 
$
1,221,757

Accumulated impairment losses
(254,735
)
 
—

 
(330,112
)
 
(584,847
)
Goodwill, net
181,841

 
372,025

 
83,044

 
636,910

 
 
 
 
 
 
 
 
Goodwill acquired
36,540

 
9,561

 
—

 
46,101

Other
2,269

 
1,725

 
773

 
4,767

Effect of change in exchange rates
5,559

 
432

 
7,247

 
13,238

 
 
 
 
 
 
 
 
Goodwill balance at December 31, 2012
 
 
 
 
 
 
 
Goodwill before impairment
475,711

 
383,743

 
414,394

 
1,273,848

Accumulated impairment losses
(249,502
)
 
—

 
(323,330
)
 
(572,832
)
Goodwill, net
226,209

 
383,743

 
91,064

 
701,016

 
 
 
 
 
 
 
 
Goodwill impairment
(173,249
)
 
—

 
—

 
(173,249
)
Adjustments of previous acquisitions
3,958

 
—

 
—

 
3,958

Effect of change in exchange rates
3,314

 
11,135

 
2,404

 
16,853

 
 
 
 
 
 
 
 
Goodwill balance at December 31, 2013
 
 
 
 
 
 
 
Goodwill before impairment
493,610

 
394,878

 
429,783

 
1,318,271

Accumulated impairment losses
(433,378
)
 
—

 
(336,315
)
 
(769,693
)
Goodwill, net
$
60,232

 
$
394,878

 
$
93,468

 
$
548,578