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Goodwill (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Jun. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Goodwill, ending balance $ 31,321   $ 1,000 $ 31,321
Goodwill impairment charge (benefit) (5,802)     23,498
Goodwill, translation adjustments       (193)
PST [Member]        
Goodwill, ending balance 30,177     30,177
Goodwill impairment charge (benefit)   $ 29,300   23,498
Adjustment to reduce the goodwill impairment (5,802)      
Goodwill impairment loss attributable to noncontrolling interest (1,274) $ 6,436   5,162
Goodwill, translation adjustments       (69)
Electronics [Member]        
Goodwill, ending balance $ 1,144   1,000 1,144
Goodwill, translation adjustments     $ (78) $ (124)