Marketable Securities (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 01, 2014	Mar. 02, 2013
Schedule of amortized cost and estimated fair values of investments by contractual maturity
Amortized Cost, Due within one year	$ 204
Amortized Cost, Due after one year through five years	2,686
Amortized Cost, Due after five years through 10 years	7,564
Amortized Cost, Due after 10 years through 15 years	1,250
Amortized Cost, Due beyond 15 years	15
Amortized Cost, Total	11,719
Estimated Market Value, Due within one year	204
Estimated Market Value, Due after one year through five years	2,719
Estimated Market Value, Due after five years through 10 years	7,515
Estimated Market Value, Due after 10 years through 15 years	1,024
Estimated Market Value, Due beyond 15 years	15
Estimated Fair Value	$ 11,477	$ 38,814