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Inventories (Schedule of Inventories) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Inventory Disclosure [Abstract]    
Raw material $ 41,758 $ 47,117
Work-in-process 12,268 16,238
Finished goods 35,586 43,703
Total inventories $ 89,612 $ 107,058