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Acquisitions (Details 3) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Jul. 02, 2013
Business Acquisition [Line Items]      
Goodwill $ 39,247 $ 39,247  
Transcend Products LLC      
Business Acquisition [Line Items]      
Property and equipment, net     $ 29
Intangible assets, net     3,249
Goodwill     2,477
Total assets acquired     $ 5,755