Marketable Securities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 01, 2012	Mar. 03, 2012
Amortized cost, gross unrealized gains and losses, and estimated fair values of investments available for sale
Amortized Cost	$ 35,566	$ 19,670
Gross Unrealized Gains	145	188
Gross Unrealized Losses	(201)	(258)
Estimated Market Value, Total	35,510	19,600
Municipal bonds [Member]
Amortized cost, gross unrealized gains and losses, and estimated fair values of investments available for sale
Amortized Cost	35,566	19,670
Gross Unrealized Gains	145	188
Gross Unrealized Losses	(201)	(258)
Estimated Market Value, Total	$ 35,510	$ 19,600

Amount of debt securities categorized neither as held-to-maturity nor trading.

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Reference 9: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef

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+ Details

- Definition

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ References+ Details