Consolidated Statements of Comprehensive Earnings (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	May. 31, 2015	Jun. 01, 2014
Gains on Marketable Securities [Member]
Unrealized gains on marketable securities:
Unrealized holding gains (losses) arising during the period	$ 103	$ 32
Less: reclassification adjustment for gains included in net earnings	(3)	0
Losses on Marketable Securities [Member]
Unrealized gains on marketable securities:
Unrealized holding gains (losses) arising during the period	(31)	(3)
Net earnings	4,777	8,216
Foreign currency translation	55	(94)
Other comprehensive earnings (loss)	124	(65)
Total comprehensive earnings	$ 4,901	$ 8,151