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Goodwill Schedule of Goodwill Allocated to Reporting Segments (Tables)
 9 Months Ended
Sep. 30, 2014
Goodwill [Line Items]  
Schedule of Goodwill [Table Text Block]
The following table reflects goodwill allocated to each reporting segment as of September 30, 2014:

 
Electricity
 
Gas
 
Water
 
Total Company
 
(in thousands)
Balance at January 1, 2014
 
 
 
 
 
 
 
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

 
 
 
 
 
 
 
 
Goodwill impairment
(977
)
 
—

 
—

 
(977
)
Effect of change in exchange rates
(2,408
)
 
(24,211
)
 
(5,341
)
 
(31,960
)
 
 
 
 
 
 
 
 
Balance at September 30, 2014
 
 
 
 
 
 
 
Goodwill before impairment
463,550

 
370,667

 
397,462

 
1,231,679

Accumulated impairment losses
(406,703
)
 
—

 
(309,335
)
 
(716,038
)
Goodwill, net
$
56,847

 
$
370,667

 
$
88,127

 
$
515,641