Marketable Securities (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Feb. 27, 2016	Feb. 28, 2015	Mar. 01, 2014
Schedule of Available-for-sale Securities [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.60%	4.00%	3.75%
Amortized Cost	$ 42,571	$ 10,973
Estimated Fair Value	42,692	10,982
Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Due within one year	50
Amortized Cost, Due after one year through five years	3,853
Amortized Cost, Due after five years through 10 years	7,198
Amortized Cost, Due after 10 years through 15 years	1,292
Amortized Cost	12,393	10,973
Estimated Market Value, Due within one year	50
Estimated Market Value, Due after one year through five years	3,903
Estimated Market Value, Due after five years through 10 years	7,428
Estimated Market Value, Due after 10 years through 15 years	1,188
Estimated Fair Value	$ 12,569	$ 10,982