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Inventories (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Inventory [Line Items]    
Inventory, Raw Materials, Gross $ 76,680 $ 94,437
Inventory, Work in Process, Gross 33,721 35,631
Inventory, Finished Goods, Gross 88,901 85,657
Inventories, net 199,302 215,725
Inventory Valuation Reserves $ 11,269 $ 5,233