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Inventories (Schedule of Inventories) (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Inventories [Abstract]    
Raw materials $ 46,407 $ 41,767
Work-in-progress 10,335 8,779
Finished goods 25,375 20,707
Total inventories, net $ 82,117 $ 71,253