Marketable Securities (Details 2) (USD $) In Thousands, unless otherwise specified	Nov. 29, 2014	Mar. 01, 2014
Schedule of amortized cost and estimated fair values of investments by contractual maturity
Amortized Cost, Due within one year	$ 237
Amortized Cost, Due after one year through five years	2,650
Amortized Cost, Due after five years through 10 years	6,888
Amortized Cost, Due after 10 years through 15 years	1,250
Amortized Cost, Total	11,025	11,719
Estimated Market Value, Due within one year	243
Estimated Market Value, Due after one year through five years	2,660
Estimated Market Value, Due after five years through 10 years	6,935
Estimated Market Value, Due after 10 years through 15 years	1,144
Estimated Market Value, Total	$ 10,982	$ 11,477