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Goodwill and Other Intangible Assets (Schedule of Goodwill) (Details)
$ in Thousands
 6 Months Ended
Jun. 30, 2016
USD ($)
Goodwill [Roll Forward]  
Balance, beginning $ 11,044
Foreign currency translation 70
Balance, ending 11,114
Accumulated impairment losses:  
Balance, beginning (976)
Foreign currency translation (70)
Balance, ending (1,046)
Net Goodwill 10,068
T And D Solutions Segment [Member]  
Goodwill [Roll Forward]  
Balance, beginning 7,733
Foreign currency translation 70
Balance, ending 7,803
Accumulated impairment losses:  
Balance, beginning (976)
Foreign currency translation (70)
Balance, ending (1,046)
Net Goodwill 6,757
Critical Power Solutions Segment [Member]  
Goodwill [Roll Forward]  
Balance, beginning 3,311
Balance, ending 3,311
Accumulated impairment losses:  
Net Goodwill $ 3,311