Marketable Securities (Details) - USD ($) $ in Thousands	Nov. 26, 2016	Feb. 27, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 11,419
Amortized Cost	41,772	$ 42,571
Gross Unrealized Gains	50	285
Gross Unrealized Losses	225	164
Estimated Market Value, Total	11,328
Available-for-sale Securities	41,597	42,692
Mutual Fund [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	30,353	30,178
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	(84)	(55)
Estimated Market Value, Total	30,269	30,123
Municipal bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	11,419	12,393
Gross Unrealized Gains	50	285
Gross Unrealized Losses	141	109
Estimated Market Value, Total	$ 11,328	$ 12,569