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Inventories Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 27, 2014
Mar. 29, 2014
Inventory Disclosure [Abstract]    
Inventory, Raw Materials, Gross $ 14,094us-gaap_InventoryRawMaterials $ 15,306us-gaap_InventoryRawMaterials
Inventory, Work in Process, Gross 198,270us-gaap_InventoryWorkInProcess 192,067us-gaap_InventoryWorkInProcess
Inventory, Finished Goods, Gross 34,300us-gaap_InventoryFinishedGoods 26,626us-gaap_InventoryFinishedGoods
Inventory, Net $ 246,664us-gaap_InventoryNet $ 233,999us-gaap_InventoryNet [1]
[1] Derived from audited financial statements