Marketable Securities (Tables)

12 Months Ended

Feb. 27, 2016

Marketable Securities [Abstract]

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

(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
February 27, 2016
Mutual fund	$	30,178	$	—	$	(55	)	$	30,123
Municipal bonds	12,393		285		(109		)	12,569
Total marketable securities	$	42,571	$	285	$	(164	)	$	42,692
February 28, 2015
Municipal bonds	$	10,973	$	127	$	(118	)	$	10,982
Total marketable securities	$	10,973	$	127	$	(118	)	$	10,982

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 our securities were in continuous unrealized loss positions, but were not deemed to be other than temporarily impaired, as of February 27, 2016:

	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	$	—	$	—	$	1,345	$	(109	)	$	1,345	$	(109	)

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

The amortized cost and estimated fair values of our municipal bonds at February 27, 2016, 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 penalty.

(In thousands)	Amortized Cost		Estimated Market Value
Due within one year	$	50	$	50
Due after one year through five years	3,853		3,903
Due after five years through 10 years	7,198		7,428
Due after 10 years through 15 years	1,292		1,188
Total	$	12,393	$	12,569