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]	Total
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
Exchange rate changes				377		377
Unrealized gains on marketable securities during the period, net of tax				(10)
Stock option exercised	18	3,621
Shares issued pursuant to the exercise of stock options	181,343				12	181,343
Stock-based compensation		959
Tax benefit on exercise of options		527
Cash dividends			(28,903)
Balance at Feb. 27, 2011	2,072	154,459	166,795	1,983	(1)
Balance, shares at Feb. 27, 2011	20,722,179				158
Net earnings			23,442			23,442
Exchange rate changes				70		70
Unrealized gains on marketable securities during the period, net of tax				24
Stock option exercised	7	1,803
Shares issued pursuant to the exercise of stock options	73,412					73,412
Stock-based compensation		762
Tax benefit on exercise of options		91
Cash dividends			(8,296)
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
Net earnings			16,961			16,961
Exchange rate changes				(1,390)		75
Unrealized gains on marketable securities during the period, net of tax				(58)
Stock option exercised	4	758			(93)
Shares issued pursuant to the exercise of stock options	35,987				3,908	35,987
Stock-based compensation		915
Tax benefit on exercise of options		2
Cash dividends			(60,388)
Balance at Mar. 03, 2013	$ 2,083	$ 158,790	$ 138,514	$ 629	$ (94)	$ 299,922
Balance, shares at Mar. 03, 2013	20,831,578				4,066