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Goodwill (Tables)
 3 Months Ended
Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of the changes in goodwill
The following summarizes the changes in goodwill during the three months ended March 31, 2015 (in thousands):
 
 
December 31, 2014
 
Effect of Currency Translation
 
March 31, 2015
Precision Power
 
$
43,873

 
$
(1,317
)
 
$
42,556

Inverters
 
159,456

 
(13,169
)
 
146,287

Consolidated
 
$
203,329

 
$
(14,486
)
 
$
188,843