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Inventories - Continuity of Obsolescence Reserve for Inventory (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Mar. 30, 2013
Mar. 31, 2012
Mar. 26, 2011
Inventory Disclosure [Abstract]      
Beginning balance $ 4,680 $ 5,086 $ 4,890
Additional charges 1,327 2,462 1,535
Deductions (2,408) (2,868) (1,339)
Ending balance $ 3,599 $ 4,680 $ 5,086