Marketable Securities (Details 2) - USD ($) $ in Thousands	Mar. 04, 2017	Feb. 27, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 9,595	$ 42,571
Estimated Fair Value	9,589	42,692
Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Due within one year	548
Amortized Cost, Due after one year through five years	3,003
Amortized Cost, Due after five years through 10 years	4,553
Amortized Cost, Due after 10 years through 15 years	1,491
Amortized Cost	9,595	12,393
Estimated Market Value, Due within one year	548
Estimated Market Value, Due after one year through five years	3,028
Estimated Market Value, Due after five years through 10 years	4,605
Estimated Market Value, Due after 10 years through 15 years	1,408
Estimated Fair Value	$ 9,589	$ 12,569