Marketable Securities (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 01, 2013	Mar. 02, 2013
Schedule of amortized cost and estimated fair values of investments by contractual maturity
Amortized Cost, Due within one year	$ 29,777
Amortized Cost, Due after one year through five years	3,915
Amortized Cost, Due after five years through 10 years	6,539
Amortized Cost, Due after 10 years through 15 years	1,530
Amortized Cost, Due beyond 15 years	91
Amortized Cost, Total	41,852
Estimated Market Value, Due within one year	29,775
Estimated Market Value, Due after one year through five years	3,945
Estimated Market Value, Due after five years through 10 years	6,504
Estimated Market Value, Due after 10 years through 15 years	1,339
Estimated Market Value, Due beyond 15 years	94
Estimated Market Value, Total	$ 41,657	$ 38,814