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Capital Stock - Summary of Common Stock Outstanding (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 25, 2017
Mar. 26, 2016
Mar. 28, 2015
Class of Stock [Line Items]      
Beginning Balance, Shares 17,960,881 17,960,881  
Exercise of stock options, Shares 0 0 111,372
Ending Balance, Shares 17,960,881 17,960,881 17,960,881
Balance as of beginning balance $ 69,601 $ 69,601  
Exercise of stock options 0 0 $ 116
Balance as of ending balance $ 69,601 $ 69,601 $ 69,601
Class A Common Stock [Member]      
Class of Stock [Line Items]      
Beginning Balance, Shares 10,242,911 10,242,911  
Exercise of stock options, Shares 0 0  
Ending Balance, Shares 10,242,911 10,242,911 10,242,911
Balance as of beginning balance $ 30,988 [1] $ 30,988  
Exercise of stock options 0 0  
Balance as of ending balance $ 30,988 [1] $ 30,988 [1] $ 30,988
Class B Common Stock [Member]      
Class of Stock [Line Items]      
Beginning Balance, Shares 7,717,970 7,717,970  
Exercise of stock options, Shares 0 0  
Ending Balance, Shares 7,717,970 7,717,970 7,717,970
Balance as of beginning balance $ 38,613 [1] $ 38,613  
Exercise of stock options 0 0  
Balance as of ending balance $ 38,613 [1] $ 38,613 [1] $ 38,613
[1] unlimited shares authorized