Debt (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 01, 2012	Aug. 27, 2011	Mar. 03, 2012
Debt (Textual) [Abstract]
Line of Credit Facility, Amount Outstanding	$ 0		$ 0
Line of Credit Facility, Maximum Borrowing Capacity	80,000
Line of Credit Facility, Expiration Date	Jan. 27, 2014
Minimum net worth required	279,500
Net Worth	323,100
Adjusted debt-to-EBITDA ratio	0.12
Decrease in non-credit facility debt	25,000
Excess of non credit facility debt on unrestricted cash balances, cash equivalents and short-term marketable securities available for sale	15,000
Interest payments	300	500
Maximum [Member]
Debt (Textual) [Abstract]
Adjusted debt-to-EBITDA ratio	2.75
Recovery Zone Facility Bonds [Member]
Debt (Textual) [Abstract]
Debt	12,000
Industrial Development Bonds [Member]
Debt (Textual) [Abstract]
Debt Instrument Issued	10,000
Cash disbursements from restricted investments	2,000
Debt	$ 18,400