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Marketable Securities (Details Textual) (USD $) In Thousands, unless otherwise specified | 9 Months Ended |
--- | --- | ---
Dec. 01, 2012 | Nov. 26, 2011 | Mar. 03, 2012
Marketable Securities (Textual) [Abstract] |  |  |
Investments, Total | $ 35,500 |  |
Short-term marketable securities available for sale | 25,154 |  | 11,664
Available-for-sale Securities, Debt Securities, Noncurrent | 10,356 |  | 7,936
Available-for-sale Securities, Gross Realized Gains | 300 | 400 |
Prism Assurance Ltd [Member] |  |  |
Marketable Securities (Textual) [Abstract] |  |  |
Investments, Total | $ 10,600 |  |

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