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Inventories - Components of Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 30, 2013
Mar. 31, 2012
Inventory Disclosure [Abstract]    
Raw materials and purchased parts $ 44,332 $ 48,126
Work-in-process 8,985 10,511
Finished goods 9,750 9,418
Inventories $ 63,067 $ 68,055