Marketable Securities (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	Mar. 02, 2013
Amortized cost, gross unrealized gains and losses, and estimated fair values of investments available for sale
Amortized Cost	$ 26,815	$ 38,927
Gross Unrealized Gains	40	127
Gross Unrealized Losses	(584)	(240)
Estimated Market Value, Total	26,271	38,814
Municipal bonds [Member]
Amortized cost, gross unrealized gains and losses, and estimated fair values of investments available for sale
Amortized Cost	26,815	38,927
Gross Unrealized Gains	40	127
Gross Unrealized Losses	(584)	(240)
Estimated Market Value, Total	$ 26,271	$ 38,814

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

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: 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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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Reference 8: http://www.xbrl.org/2003/role/presentationRef

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Reference 9: 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