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Capital Stock - Summary of Common Stock Outstanding (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 28, 2015
Mar. 29, 2014
Class of Stock [Line Items]    
Beginning Balance, Shares 17,849,509  
Exercise of stock options, Shares 111,372 74,813
Ending Balance, Shares 17,960,881 17,849,509
Balance as of beginning balance $ 69,475  
Exercise of stock options 116 $ 74
Balance as of ending balance $ 69,601 $ 69,475
Class A Common Stock [Member]    
Class of Stock [Line Items]    
Beginning Balance, Shares 10,131,539  
Exercise of stock options, Shares 111,372  
Ending Balance, Shares 10,242,911 10,131,539
Balance as of beginning balance $ 30,862  
Exercise of stock options 126  
Balance as of ending balance $ 30,988 [1] $ 30,862
Class B Common Stock [Member]    
Class of Stock [Line Items]    
Beginning Balance, Shares 7,717,970  
Ending Balance, Shares 7,717,970 7,717,970
Balance as of beginning balance $ 38,613  
Balance as of ending balance $ 38,613 [1] $ 38,613
[1] unlimited shares authorized