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Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Inventory Disclosure [Abstract]    
Raw materials $ 14,120us-gaap_InventoryRawMaterialsNetOfReserves $ 15,234us-gaap_InventoryRawMaterialsNetOfReserves
Work-in-process 3,809us-gaap_InventoryWorkInProcessNetOfReserves 2,958us-gaap_InventoryWorkInProcessNetOfReserves
Finished goods 6,713us-gaap_InventoryFinishedGoodsNetOfReserves 6,692us-gaap_InventoryFinishedGoodsNetOfReserves
Inventories $ 24,642us-gaap_InventoryNet $ 24,884us-gaap_InventoryNet