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Goodwill Schedule of Goodwill Allocated to Reporting Segments (Tables)
 6 Months Ended
Jun. 30, 2013
Goodwill [Line Items]  
Schedule of Goodwill [Table Text Block]
The following table reflects the goodwill balance as of June 30, 2013:

 
Energy
 
Water
 
Total Company
 
(in thousands)
Balance at January 1, 2013
 
 
 
 
 
Goodwill before impairment
$
859,454

 
$
414,394

 
$
1,273,848

Accumulated impairment losses
(249,502
)
 
(323,330
)
 
(572,832
)
Goodwill, net
609,952

 
91,064

 
701,016

 
 
 
 
 
 
Adjustments of previous acquisition
3,958

 
—

 
3,958

Effect of change in exchange rates
(7,551
)
 
(1,208
)
 
(8,759
)
 
 
 
 
 
 
Balance at June 30, 2013
 
 
 
 
 
Goodwill before impairment
851,471

 
407,497

 
1,258,968

Accumulated impairment losses
(245,112
)
 
(317,641
)
 
(562,753
)
Goodwill, net
$
606,359

 
$
89,856

 
$
696,215