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Inventories (Schedule of Inventories) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Inventories [Abstract]    
Raw materials $ 76,806 $ 64,340
Work-in-progress 16,355 13,621
Finished goods 25,815 18,071
Total inventories, net $ 118,976 $ 96,032