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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 |

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