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Inventories - Components of Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 28, 2013
Mar. 30, 2013
Inventory Disclosure [Abstract]    
Raw materials and purchased parts $ 49,298 $ 44,332
Work-in-process 13,353 8,985
Finished goods 5,975 9,750
Inventories $ 68,626 $ 63,067