Consolidated Statements of Comprehensive Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 30, 2015	Aug. 31, 2014	Aug. 30, 2015	Aug. 31, 2014
Gains on Marketable Securities [Member]
Unrealized gains on marketable securities:
Unrealized holding gains arising during the period	$ 14		$ 29	$ 22
Less: reclassification adjustment for gains (losses) included in net earnings	(3)	$ 0	(6)	0
Losses on Marketable Securities [Member]
Unrealized gains on marketable securities:
Unrealized holding gains arising during the period	(128)	$ (12)	(71)	$ (5)
Less: reclassification adjustment for gains (losses) included in net earnings	3		3
Net earnings	4,569	$ 4,955	9,346	$ 13,171
Foreign currency translation	8	18	63	(76)
Other comprehensive (loss) earnings	(106)	6	18	(59)
Total comprehensive earnings	$ 4,463	$ 4,961	$ 9,364	$ 13,112