Marketable Securities (Details) (USD $) In Thousands, unless otherwise specified	Mar. 02, 2013	Mar. 03, 2012
Amortized cost, gross unrealized gains and losses, and estimated fair values of investments available for sale
Amortized Cost	$ 38,927	$ 19,670
Gross Unrealized Gains	127	188
Gross Unrealized Losses	(240)	(258)
Estimated Fair Value	38,814	19,600
Municipal bonds
Amortized cost, gross unrealized gains and losses, and estimated fair values of investments available for sale
Amortized Cost	38,927	19,670
Gross Unrealized Gains	127	188
Gross Unrealized Losses	(240)	(258)
Estimated Fair Value	$ 38,814	$ 19,600

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

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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