Marketable Securities (Tables)

9 Months Ended

Dec. 01, 2012

Amortized cost, gross unrealized gains and losses, and estimated fair values of investments available for sale

The amortized cost, gross unrealized gains and losses, and estimated fair values of investments available for sale at December 1, 2012 and March 3, 2012, are as follows:



(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
December 1, 2012
Municipal bonds	$	35,566	$	145	$	(201	)	$	35,510
Total investments	$	35,566	$	145	$	(201	)	$	35,510
March 3, 2012
Municipal bonds	$	19,670	$	188	$	(258	)	$	19,600
Total investments	$	19,670	$	188	$	(258	)	$	19,600

Schedule of length of time that available-for-sale securities were in continuous unrealized loss positions

The following table presents the length of time that available-for-sale securities were in continuous unrealized loss positions, but were not deemed to be other than temporarily impaired, as of December 1, 2012:



	Less Than 12 Months					Greater Than or Equal to 12 Months					Total
(In thousands)	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Municipal bonds	$	11,987	$	(8	)	$	1,057	$	(193	)	$	13,044	$	(201	)
Total investments	$	11,987	$	(8	)	$	1,057	$	(193	)	$	13,044	$	(201	)

Schedule of amortized cost and estimated fair values of investments by contractual maturity

The amortized cost and estimated fair values of investments at December 1, 2012, by contractual maturity are shown below. Expected maturities may differ from contractual maturities as borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.



(In thousands)	Amortized Cost		Estimated Market Value
Due within one year	$	25,155	$	25,154
Due after one year through five years	3,983		4,015
Due after five years through 10 years	4,781		4,882
Due after 10 years through 15 years	1,530		1,338
Due beyond 15 years	117		121
Total	$	35,566	$	35,510