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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Inventory Disclosure [Abstract]    
Raw materials $ 42,600us-gaap_InventoryRawMaterialsNetOfReserves $ 44,847us-gaap_InventoryRawMaterialsNetOfReserves
Work-in-process 15,912us-gaap_InventoryWorkInProcessNetOfReserves 13,876us-gaap_InventoryWorkInProcessNetOfReserves
Finished goods 85,687us-gaap_InventoryFinishedGoodsNetOfReserves 89,426us-gaap_InventoryFinishedGoodsNetOfReserves
Total inventory $ 144,199us-gaap_InventoryNet $ 148,149us-gaap_InventoryNet