Debt (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 01, 2012	Nov. 26, 2011	Mar. 03, 2012
Debt (Textual) [Abstract]
Line of Credit Facility Maximum Capacity under Previous Facility	$ 80,000
Line of Credit Facility, Maximum Borrowing Capacity	100,000
Line of Credit Facility, Expiration Date	Oct. 19, 2017
Line of Credit Facility, Amount Outstanding	0		0
Minimum net worth required	260,100
Net Worth	330,100
Adjusted debt-to-EBITDA ratio	0.11
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	600	800
Maximum [Member]
Debt (Textual) [Abstract]
Adjusted Debt to Ebitda Ratio under Previous Facility	2.75
Adjusted debt-to-EBITDA ratio	3.00
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	5,100
Debt	18,400
Letter of Credit [Member]
Debt (Textual) [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity	$ 60,000