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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Inventory Disclosure [Abstract]    
Finished goods $ 66,045us-gaap_InventoryFinishedGoodsNetOfReserves $ 67,487us-gaap_InventoryFinishedGoodsNetOfReserves
Work-in-progress 42,417us-gaap_InventoryWorkInProcessNetOfReserves 43,031us-gaap_InventoryWorkInProcessNetOfReserves
Raw materials 73,564us-gaap_InventoryRawMaterialsNetOfReserves 69,878us-gaap_InventoryRawMaterialsNetOfReserves
Total $ 182,026us-gaap_InventoryNet $ 180,396us-gaap_InventoryNet