Marketable Securities (Details) - USD ($) $ in Thousands	Nov. 28, 2015	Feb. 28, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 41,628
Amortized Cost	71,735	$ 10,973
Gross Unrealized Gains	123	127
Gross Unrealized Losses	183	118
Estimated Market Value, Total	41,624
Available-for-sale Securities	71,675	10,982
Mutual Fund [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Equity Securities	30,107
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	(56)
Estimated Market Value, Total	30,051
Municipal bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	11,111	10,973
Gross Unrealized Gains	123	127
Gross Unrealized Losses	127	118
Estimated Market Value, Total	11,107	$ 10,982
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Market Value, Total	$ 30,517