Debt (Details Textual) (USD $)	12 Months Ended
	Mar. 02, 2013	Mar. 03, 2012	Feb. 26, 2011
Debt (Textual) [Abstract]
Amount of revolving credit facility	$ 80,000,000.0
Total availability under credit facility	100,000,000.0
Revolving credit facility expiration date	Oct. 19, 2017
Adjusted debt-to-EBITDA ratio	0.11
Borrowings outstanding under amended credit agreement	0	0
Amount of available commitment	76,600,000	66,800,000
Minimum net worth required	263,900,000
Net Worth	333,300,000
Decrease in non-credit facility debt	25,000,000
Excess of non credit facility debt on unrestricted cash balances, cash equivalents and short-term marketable securities available for sale	15,000,000
Debt	30,813,000	21,024,000
Current portion long-term debt	10,057,000	108,000
Interest payments	1,000,000	1,000,000	600,000
Industrial Development Bonds
Debt (Textual) [Abstract]
Debt Instrument Issued	10,000,000
Cash disbursements from restricted investments	5,400,000
Debt	18,400,000
Recovery Zone Facility Bonds
Debt (Textual) [Abstract]
Debt	12,000,000
Current portion long-term debt	10,000,000
Letter of Credit
Debt (Textual) [Abstract]
Total availability under credit facility	$ 60,000,000
Maximum
Debt (Textual) [Abstract]
Minimum required adjusted debt-to-EBITDA ratio	2.75
Adjusted debt-to-EBITDA ratio	3