Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Aug. 29, 2015	Feb. 28, 2015	Aug. 30, 2014	Aug. 29, 2015	Aug. 30, 2014
Income tax expense	$ 16,463		$ 19,860	$ 28,904	$ 31,741
Estimated effective tax rate (as a percent)	43.40%			41.80%
Valuation allowance released		$ 1,841,304
Valuation allowance against net deferred tax assets	$ 231,683	$ 231,679		$ 231,683