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Capital Stock - Summary of Common Stock Outstanding (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Mar. 30, 2013
Mar. 31, 2012
Mar. 26, 2011
Changes In Equity And Comprehensive Income Line Items [Line Items]      
Beginning Balance, Shares 11,391,585 11,390,505  
Stock rights offering, Shares 3,442,026    
Stock rights offering $ 3,593    
Exercise of stock options, Shares   1,080 128
Ending Balance, Shares 14,833,611 11,391,585 11,390,505
Balance as of beginning balance 60,896 60,895  
Exercise of stock options   1  
Balance as of ending balance 64,489 60,896 60,895
Class A Common Stock [Member]
      
Changes In Equity And Comprehensive Income Line Items [Line Items]      
Beginning Balance, Shares 3,673,615 3,672,535  
Stock rights offering, Shares 3,442,026    
Stock rights offering 3,593    
Exercise of stock options, Shares   1,080  
Ending Balance, Shares 7,115,641 3,673,615  
Balance as of beginning balance 22,283 22,282  
Exercise of stock options   1  
Balance as of ending balance 25,876 22,283  
Class B Common Stock [Member]
      
Changes In Equity And Comprehensive Income Line Items [Line Items]      
Beginning Balance, Shares 7,717,970 7,717,970  
Stock rights offering       
Ending Balance, Shares 7,717,970 7,717,970  
Balance as of beginning balance 38,613 38,613  
Exercise of stock options       
Balance as of ending balance $ 38,613 $ 38,613