Marketable Securities (Tables)

9 Months Ended

Nov. 28, 2015

Marketable Securities [Abstract]

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

Marketable securities available for sale at November 28, 2015 and February 28, 2015, were as follows:

(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
November 28, 2015
Mutual fund	$	30,107	$	—	$	(56	)	$	30,051
Municipal bonds	11,111		123		(127		)	11,107
Commercial paper	30,517		—		—			30,517
Total marketable securities	$	71,735	$	123	$	(183	)	$	71,675
February 28, 2015
Municipal bonds	$	10,973	$	127	$	(118	)	$	10,982
Total marketable securities	$	10,973	$	127	$	(118	)	$	10,982

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

The amortized cost and estimated fair values of municipal bonds and commercial paper at November 28, 2015, 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 Fair Value
Due within one year	$	30,601	$	30,602
Due after one year through five years	2,948		2,966
Due after five years through 10 years	6,829		6,922
Due after 10 years through 15 years	1,250		1,134
Total	$	41,628	$	41,624