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Goodwill (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Goodwill impairment charge (benefit) $ 29,300   $ 29,300
Goodwill, translation adjustments     2,962
PST [Member]      
Goodwill impairment charge (benefit)     29,300
Goodwill impairment loss attributable to noncontrolling interest $ 6,436    
Goodwill, translation adjustments     2,985
Electronics [Member]      
Goodwill, translation adjustments   $ (75) $ (23)