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Accounts Receivable - Schedule of Continuity of Allowance for Doubtful Accounts (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Mar. 30, 2013
Mar. 31, 2012
Mar. 26, 2011
Receivables [Abstract]      
Beginning balance $ 2,465 $ 2,482 $ 2,518
Reduction in provision recorded (23)    
Additional provision recorded   231 247
Net write-offs (333) (248) (283)
Ending balance $ 2,109 $ 2,465 $ 2,482