Consolidated Statements Of Stockholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Comprehensive Income (Loss) [Member]	Total
Balance at Mar. 01, 2009	$ 2,047	$ 146,934	$ 145,107	$ 1,622	$ (1)
Balance, shares at Mar. 01, 2009	20,470,661				145
Net earnings			25,359			25,359	25,359
Exchange rate changes				38		38
Unrealized gain loss on marketable securities, net of tax				(44)		(44)
Stock option exercise	7	1,171
Stock option exercise, shares	70,175				1
Stock-based compensation		1,117
Tax benefit on exercise of options		130
Cash dividends			(7,389)
Comprehensive income						25,353
Balance at Feb. 28, 2010	2,054	149,352	163,077	1,616	(1)
Balance, shares at Feb. 28, 2010	20,540,836				146
Net earnings			32,621			32,621	32,621
Exchange rate changes				377		377
Unrealized gain loss on marketable securities, net of tax				(10)		(10)
Stock option exercise	18	3,621
Stock option exercise, shares	181,343				12
Stock-based compensation		959
Tax benefit on exercise of options		527
Cash dividends			(28,903)
Comprehensive income						32,988
Balance at Feb. 27, 2011	2,072	154,459	166,795	1,983	(1)		325,308
Balance, shares at Feb. 27, 2011	20,722,179				158
Net earnings			23,442			23,442	23,442
Exchange rate changes				70		70
Unrealized gain loss on marketable securities, net of tax				24		24
Stock option exercise	7	1,803
Stock option exercise, shares	73,412
Stock-based compensation		762
Tax benefit on exercise of options		91
Cash dividends			(8,296)
Comprehensive income						23,536
Balance at Feb. 26, 2012	$ 2,079	$ 157,115	$ 181,941	$ 2,077	$ (1)		$ 343,211
Balance, shares at Feb. 26, 2012	20,795,591				158