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Goodwill (Text Block)
 12 Months Ended
Dec. 31, 2017
Goodwill Excluding Non Goodwill Intangibles [Abstract]  
Goodwill Disclosure [Text Block]
Goodwill

The following table reflects goodwill allocated to each reporting segment at December 31, 2017 and 2016:

 
Electricity
 
Gas
 
Water
 
Total Company
 
(in thousands)
Goodwill balance at January 1, 2016
 
 
 
 
 
 
 
Goodwill before impairment
$
414,910

 
$
331,436

 
$
350,314

 
$
1,096,660

Accumulated impairment losses
(362,177
)
 
—

 
(266,361
)
 
(628,538
)
Goodwill, net
52,733

 
331,436

 
83,953

 
468,122

 
 
 
 
 
 
 
 
Effect of change in exchange rates
(1,360
)
 
(11,523
)
 
(2,745
)
 
(15,628
)
 
 
 
 
 
 
 
 
Goodwill balance at December 31, 2016
 
 
 
 
 
 
 
Goodwill before impairment
400,299

 
319,913

 
334,505

 
1,054,717

Accumulated impairment losses
(348,926
)
 
—

 
(253,297
)
 
(602,223
)
Goodwill, net
51,373

 
319,913

 
81,208

 
452,494

 
 
 
 
 
 
 
 
Goodwill acquired
59,675

 
—

 
—

 
59,675

Effect of change in exchange rates
3,193

 
32,790

 
7,610

 
43,593

 
 
 
 
 
 
 
 
Goodwill balance at December 31, 2017
 
 
 
 
 
 
 
Goodwill before impairment
500,625

 
352,703

 
378,901

 
1,232,229

Accumulated impairment losses
(386,384
)
 
—

 
(290,083
)
 
(676,467
)
Goodwill, net
$
114,241

 
$
352,703

 
$
88,818

 
$
555,762



During our 2017 annual goodwill impairment test, performed as of October 1, 2017, we performed a qualitative assessment and determined it is not more likely than not that the fair value of our reporting units is less than their carrying amounts.