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Inventories (Components of Inventories) (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Inventory Disclosure [Abstract]    
Raw materials and component parts $ 140,239us-gaap_InventoryRawMaterialsAndPurchasedPartsNetOfReserves $ 137,584us-gaap_InventoryRawMaterialsAndPurchasedPartsNetOfReserves
Work in process 40,311us-gaap_InventoryWorkInProcessNetOfReserves 37,178us-gaap_InventoryWorkInProcessNetOfReserves
Finished goods 63,015us-gaap_InventoryFinishedGoodsNetOfReserves 62,869us-gaap_InventoryFinishedGoodsNetOfReserves
Total $ 243,565us-gaap_InventoryNet $ 237,631us-gaap_InventoryNet