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Inventories (Schedule of Inventories) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Inventories [Abstract]    
Raw materials $ 41,419us-gaap_InventoryRawMaterials $ 41,767us-gaap_InventoryRawMaterials
Work-in-progress 9,681us-gaap_InventoryWorkInProcess 8,779us-gaap_InventoryWorkInProcess
Finished goods 20,842us-gaap_InventoryFinishedGoods 20,707us-gaap_InventoryFinishedGoods
Total inventories, net $ 71,942us-gaap_InventoryNet $ 71,253us-gaap_InventoryNet